The following set-up is called
Name of the scientist who first reported that plants purify foul air.
Z scheme is (i) Cyclic photophosphorylation (ii) Noncyclic photophosphorylation (iii) Proposed by P. Mitchell.
For evolution of one molecule of oxygen, how many light quanta are required ?
The primary electron acceptor in noncyclic photophosphorylation in the light phase is
Photophosphorylation in a chloroplast is most similar to which of the following mitochondrial reactions ?
C 4 acid formed in the mesophyll cell of C 4 plants leaf during photosynthesis is
Read the following statements on photorespiration and state them as true (T) or false (F). (A) Oxidation of RuBP in the stroma of chloroplast in bright light and high oxygen. (B) Does not utilise ATP and reducing power. (C) Results in the release of CO 2 with the utilisation of energy. (D) The biological function of photorespiration is not yet known. A B C D 1. F T T F 2. F F T F 3. T F T F 4. T F T T
Increase in light intensity beyond saturation point causes
Read the following statements and state them as true (T) or false (F). A. If CO 2 concentration increases up to 0.05%, the rate of photosynthesis increases. B. The C 3 and C 4 plants respond similarly to CO 2 concentration. C. C 3 plants respond to high temperature and show higher photosynthetic rate. D. Light is less sensitive than temperature for dark phase A B C D 1. T F F T 2. T F F F 3. F F F F 4. F F T T
When daylight hours are increased, the rate of photosynthesis
Which of the following is a copper containing protein acting as an electron carrier?
Which is associated with photolysis of water?
NADP + is reduced to NADPH+H + in:
Photolysis of water requires the following essential elements in ionic form.
Statement A: During photosynthesis, oxygen is released in grana thylakoids of chloroplasts of higher plants. Statement B: Grana thylakoids have water splitting complex associated with Photosystem I
High-energy electrons generated from PS I during non-cyclic photophosphorylation end up with the formation of:
Choose the features shown by the alga used by Engelman in his photosynthetic experiments. A. It has chlorophyll ‘a’ and chlorophyll ‘b’. B. It has flagellated isogametes C. It is unicellular alga.
Highly acidic region of chloroplast is
Find the incorrect match.
Which of the following pigments absorbs light and prevents photo-oxidation reaction centers?
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilisation. In which of the following physiological groups would you assign this plant?
Which of the following pair of secondary metabolites has use as drugs in human welfare?
In light reaction of photosynthesis, plastocyanin facilitates the transfer of electrons from:
Match the following and choose the correct option : Column – I Column – II (A) Chlorophyll a (i) Yellow orange (B) Chlorophyll b (ii) Yellow (C) Xanthophyll (iii) Blue green (D) Carotene (iv) Yellow green A B C D 1. iii iv i ii 2. iii iv ii i 3. ii iii i iv 4. iv iii i ii
The correct sequence of cell organelles involved in photorespiration is
Water splitting complex is associated with A ,which itself is located on the B side of the membrane of thylakoid. A B 1. PS I Inner 2. PS II Outer 3. PS I Outer 4. PS II Inner
High photosynthetic efficiency is found in
C 4 plants are adapted to saline environment due to: (a) occurrence of organic acids. (b) kranz anatomy (c) dimorphic chloroplast
Red drop proposed by Emerson and Arnold indicated that:
Absorption spectrum is defined as:
Which of the following cannot be concluded from experiments of Emerson and Arnold?
In the Calvin cycle, for the fixation of 1 molecule of CO 2 , how many ATP and NADPH+H + molecules are required in the reduction step?
CO 2 acceptor in a C 3 plant is:
Plants growing in dark, show yellowing in leaves and elongated internode, this condition is known as:
In Z-scheme of light reaction electrons flow from:
Purple and green Sulphur bacteria use:
Which amongst the following is a wasteful process in plants?
Choose the correct statement with respect to C 4 plants.
The products of the photochemical reaction are :
If in a photosynthetic system H 2 O 18 type is provided, what will be the type of oxygen released in the process?
In a chloroplast the highest number of protons are found in
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
Which of the following is not a product of light reaction of photosynthesis?
In Hatch and Slack pathway, the primary CO 2 acceptor is –
Which statement is wrong about photorespiration ?
Match the following with respect to C 4 cycle. List – I List – II A) Product of Carboxylation coupled to dephosphorylation of substrate I) Phosphoenol pyruvic acid B) Product of carboxylation and cleavage of the substrate. II) Oxaloacetic acid C) Product of oxidative decarboxylation reaction III) Phosphoglyceric acid D) Product of substrate phosphorylation reaction IV) Pyruvic acid
During formation of ATP in chloroplast by chemiosmosis the part of the thylakoid which acts as proton pump is
NADP reductase enzyme is located on:
The primary CO 2 acceptor in C 4 and C 3 plants are respectively
During light reaction of photosynthesis, the site for splitting of water molecule is:
Which of the following is a product of dark reaction in photosynthesis?
Green Sulphur bacteria are
The number of protons, electrons and quanta of light involved to release two molecules of oxygen in C 3 plants are respectively:
In C 3 plants, the first stable product of photosynthesis during the dark reaction is
Match column I with column II Column I Column II (a) Van Neil (i) Mint (b) Engelman (ii) Hydrilla (c) Pristley (iii) Cladophora (d) Ingenhouz (iv) Purple and green bacteria
Select the correct equation for photosynthesis.
The first action spectrum of photosynthesis was described by A using B and C . A B C 1. T.W Engelmann Cladophora anaerobic bacteria 2. T.W Engelmann Cladophora aerobic bacteria. 3. Jan Ingenhousz Spirogyra aerobic bacteria. 4. Julius von Sachs Chlorella anaerobic bacteria.
Read the following four statements (A-D) on photosynthesis . A. Photosynthesis is an oxidoreductive process. B. The stroma of chloroplast is responsible for the synthesis of ATP and NADPH. C. Membrane system of chloroplast is responsible for photochemical reaction. D. Photosynthesis does not take place in in the ground tissue of leaves. Select the right option having both incorrect statements.
How can we separate the leaf pigments of any green plant ?
The following graph shows
Chemiosmotic hypothesis: (a) was experimented by P. Mitchell (b) proves that proton gradient is required for ATP synthesis. (c) explains how ATP is synthesised in chloroplast and mitochondria.
The given figure represents the light – harvesting complex. Select the incorrect statement with respect to LHC.
During photosynthesis, electrons are continuously lost from the reaction centre of PS II. What source is used to replace these electrons ?
Light reactions in green plants include all, except
The following figure is the pathway of noncyclic photophosphorylation. In which of the following options, find the correct words for all the given blanks indicated by A,B,C, and D. A B D 1. PS II Electron acceptor PS I 2. PS I Electron acceptor PS II 3. P 680 Proton acceptor P 700 4. P 700 Proton acceptor P 680
Identify the correct statement (s) w.r.t. dark reaction of photosynthesis (A) Involves use of ATP and NADPH to produce sugar. (B) Takes place in the stroma of chloroplast. (C) Does not depend directly on the presence of light. (D) Depends on the product of light reaction.
Consider the following statements on C 4 plants and select the correct option. (A) They are updated to dry temperate regions. (B) They have a special type of leaf anatomy. (C) They show response to high light intensities. (D) They lack a process called photorespiration.
In Opuntia , the concentration of organic acid
Which of the following holds false with respect to photorespiration ?
(I) In majority of plants, light saturation occurs at A of the total sunlight available to plants. (II) Photosynthesis process utilises B of water absorbed by plant. A B 1. 10% 1% 2. 50% 10% 3. 25% 5% 4. 10% 5%
Which of the following ratio is correct for producing one molecule of glucose through six rounds of Calvin cycle ? CO 2 ATP NADPH 2 1. 6 18 12 2. 6 12 18 3. 1 3 2 4. 1 0 0
The plant factors depend on: (a) environmental conditions (b) genetic predisposition (c) growth of the plant
Which of these factors has no direct effect on photosynthesis ?
C 3 cycle was discovered by a
How many ATP are required for the formation of one glucose or hexose through Calvin cycle photosynthetic dark reaction?
The first formed carbohydrates in Calvin cycle are
During light reaction of photosynthesis, the protons of stroma are carried into lumen of thylakoid by the following I. Plastocyanin II. Plastoquinone III. Cytochrome b 6 f IV. Ferridoxin
Plants are called energy transducers because they:
Which of the following scientists proved that sunlight is essential for photosynthesis?
Variegated leaf is useful in conducting experiments to show:
Who gave the first action spectrum for photosynthesis?
Who found out that glucose is made in green parts of plant and is stored in form of starch?
Which of the following scientist showed that high concentration of O 2 is inhibitory for photosynthesis?
Who demonstrated that it is only the green part of the plants that could release oxygen?
Who demonstrated photolysis of water by isolated chloroplasts in presence of a H-acceptor and sunlight and in the absence of CO 2 ?
Which of the following is incorrect about light reactions?
In higher plants, sites of photosynthesis are:
There is a clear division of labour within the chloroplast because:
Which of the following takes place in grana?
Identify the most essential photosynthetic pigment.
Porphyrin structure of chlorophyll molecule contains which metal?
Which of the following pigment is mainly responsible for providing colours to flowers and fruits?
Action spectrum is defined as:
Determine the wavelengths (colour of light) at which chlorophyll a shows absorption peak?
Match the following with respect to C 4 cycle. Column I Column II A Product of carboxylation reaction in Mesophyll cell i Phosphoenol pyruvate B Product of carboxylation reaction in bundle sheath cell ii Ribulose 1,5 – bisphosphate C CO 2 acceptor of Bundle sheath cell iii Oxaloacetic acid D CO 2 acceptor of Mesophyll cell iv Phosphoglyceric acid
What is observed in the bundle sheath cells of a C 4 plant?
How C 4 plants are capable of photosynthesis with no apparent photorespiration?
Identify correct statement.
A factor is said to be limiting for photosynthesis, when it is available in
How many turns of Calvin cycle yield one molecule of glucose?
According to chemiosmotic hypothesis, ATP synthase produce ATP when protons (H + ):
Stroma lamellae membrane lacks:
Cyclic photophosphorylation results in the formation of:
Statement I: Chlorophyll a is the chief pigment in light reaction of photosynthesis. Statement II: Chlorophyll a pigment alone absorbs the light energy in a photosystem.
Which of the following is most probable consequence experienced by photosynthetic pigments on absorbing light energy?
Production of which of the following substance depends indirectly on the products of light reactions of photosynthesis?
Which of the following electron transport is exclusively downhill?
What did Engelmann observe when he split light into its spectral components and then illuminated Cladophora , placed in a suspension of aerobic bacteria?
Kranz anatomy is shown by the leaves of: (a) Maize (b) Sorghum (c) Rice (d) Sugarcane
Statement A: Rate of photosynthesis is more in intermittent light than in continuous light of same duration. Statement B: Accumulation of end products of light phase cause feed back inhibition in continuous light.
Choose the incorrect statements. A. Light harvesting complex of photosystems absorb different wavelengths of light. B. P700 is the reaction center of Photosystem II. C. Reaction center is specialised chlorophyll b molecule.
During photorespiration, loss of CO 2 occurs in which of the given cell organelles?
During the dark reaction, 3-PGA is derived from
During photosynthesis, the oxygen of CO 2 is incorporated into
Which of the following is not related to the non-cyclic process of light reaction?
The following compounds are intermediates in the pathway of photorespiration I. phosphoglycolate II. serine III. glyoxylate. IV. glycine The correct sequence of their appearance in the pathway is
PGA as the first CO 2 fixation product was discovered in photosynthesis of
Bundle sheath cells
Anoxygenic photosynthesis is characteristic of
A few normal seedlings of tomato were kept in a darkroom. After a few days they were found to have become white-coloured like albinos. Which of the following terms will you use to describe them?
In photosynthesis, the light-independent reactions take place at
Statement A: Photosynthesis is a physicochemical process. Statement B: In Photosynthesis, light reaction is both physical and chemical process
Choose the incorrect pair
Emerson’s enhancement effect and Red drop have been instrumental in the discovery of
The process which makes major difference between C 3 and C 4 plants is
Phosphoenol Pyruvate is the primary CO 2 acceptor in
Oxygen is not produced during photosynthesis by
Which are the following are common features to photosynthesis of higher plants and green and purple bacteria. A. Carbohydrate as the main product B. H 2 O as the common byproduct C. Liberation of Oxygen D. H 2 O as the hydrogen donor
Choose the incorrect pair
Choose the incorrect statement.
Choose the correct statement with respect to Kranz anatomy and C 4 cycle of leaves.
Match the contents of List I with the contents of List II and choose the correct match. List – I List – II A) Restoration of the content of air by mint plant removed by burning candle and mouse. i) Julius Von Sachs B) Essentiality of sunlight for the restoration of air content by plants removed by mouse and burning candle. ii) Joseph Priestley C) Production of glucose in plants during their growth. iii) T. W. Englemann D) Used bacteria to detect the site of oxygen evolution in the green alga Cladophora illuminated with red and blue lights. iv) Jan Ingenhousz
Choose the correct statement with respect to photosynthesis.
Choose the incorrect statement with respect to photosynthesis.
Among the following choose the correct statements with respect to action and absorption spectra of photosynthesis. A. The absorption spectrum of Chlorophyll a superimposed-on chlorophyll b absorption spectrum. B. Action spectrum of photosynthesis and absorption spectrum of chlorophyll a does not show one to one overlap C. Chlorophylls absorb more red light and blue light than other spectral components of visible light. D. Carotenoids absorb more red light than chlorophylls.
During non-cyclic electron transport of photosynthesis of higher plants, A is the ultimate electron donor and B is the ultimate electron acceptor. A and B are respectively.
During photolysis of water in photosynthesis, the oxygen and protons of water are released into
The primary acceptor of CO 2 in Calvin cycle is
Match the following List – I List – II A) Dark reaction I) Lumen B) Cyclic electron transport II) Grana thylakoid membrane C) Non-cyclic electron transport III) Stroma thylakoid membrane D) Photolysis of water IV) Stroma
The major limiting factor for photosynthesis is
The oxygenation activity of RuBisCO enzyme in photorespiration leads to the formation of :
In light reaction, plastoquinone facilitates the transfer of electrons from :
Choose the incorrect statement with respect to photosynthesis.
Statement A: The most abundantly present protein on this planet is a bifunctional enzyme. Statement B: PEP carboxylase catalyses not only carboxylation but also oxygenation.
Which of the following statements is incorrect?
During non-cyclic photophosphorylation, when electrons are lost from the reaction centre at PS II, what is the source which replaces these electrons?
One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:
Which of the following is a proteinaceous and water soluble photosynthetic pigment?
Arrange the various steps given below in the light reaction of oxygenic photosynthetic organisms in correct sequence. A. Ejection of electron from reaction center of PS II B. Photolysis of water C. Pumping of protons from stroma to lumen D. Formation of NADPH+ H +
Choose the incorrect statement with respect to photosynthesis.
Match the following with respect to the process of photosynthesis and chloroplast. List – I List – II A) Site of electron transport I) Stroma of chloroplast B) Site of photophosphorylation II) Lumen of grana thylakoid C) Site of oxygen release III) CF particles D) Site of CO 2 reduction IV) Thylakoid membrane
During dark reaction of photosynthesis neither ATP nor NADPH are utilized in
Identify the correct sequence of stages taking place during Calvin cycle:
Current availability of CO 2 levels in atmosphere is limiting for photosynthesis in:
Primary CO 2 acceptor in mesophyll cells of sugarcane leaf is
The phenomenon responsible for transfer of trapped solar energy from antenna molecules to reaction centre is:
Photorespiration is negligible in:
The most abundant enzyme in the whole of biosphere:
The blue-green pigment in the chromatogram of pigments of leaf is
The CO 2 acceptors of C 4 cycle are
The site of high proton concentration in a chloroplast during photosynthesis is
The number of ATP molecules utilized for the fixation of 6 molecules of CO 2 in Rice and Maize is respectively
The site of photosynthetic pigments in a chloroplast is
How many turns of Calvin cycle required for the synthesis of one glucose molecule?
How many turns of Calvin cycle and how many ATP molecules will be required for synthesis of one molecule of sucrose?
Study the following statements and find which are correct and which are incorrect with respect to photosynthetic electron transport? A. The electrons removed from PSI are compensated by getting electrons from PSII. B. The electrons removed from PSII is compensated by getting electrons from water. C. The electrons removed from PSI always reach the NADP to form reducing power. D. During non-cyclic electron transport, there is cyclic electron transport in which Cytochrome b 6 and PQ are involved.
Which of the following cell organelles help in photorespiration?
showed that in the presence of sunlight, only the green parts of the plants could release oxygen.
What is the oxidation product when H 2 S is used as the hydrogen source for photosynthesis in purple and green sulphur bacteria ?
In which light of visible spectrum does maximum photosynthesis take place?
Who received the Nobel Prize for working out the early carbon pathway of photosynthesis ?
Following is the absorption spectrum of photosynthesis. Identify X,Y, and Z.
Following is the absorption spectrum of photosynthesis. Identify X,Y, and Z. X Y Z 1. Chlorophyll a Carotenoids Chlorophyll b 2. Chlorophyll b Carotenoids Chlorophyll a 3. Chlorophyll a Carotenes Xanthophyll 4. Chlorophyll b Chlorophyll a Phycobilin
The very first event in photosynthesis is
Read the following four statements A,B,C and D and select the option having both incorrect statements. (A) Antennae molecules are made up of hundreds of pigment molecules bound to proteins. (B) Antennae pigments help to make photosynthesis more efficient by absorbing different wavelength of light. (C) Only PS II is functional in cyclic photophosphorylation. (D) In PS I, the reaction centre is chlorophyll a, which absorbs light of 680 nm.
Photosystem consists of : (a) reaction centre (b) antenna molecule (c) primary electron acceptor.
Oxygen evolving complex (a) is associated with the reaction centre of PS II. (b) is located on the inner side of thylakoid membrane. (c) requires Mn, Ca, and CI.
How many of the given statements is/are correct for cyclic phosphorylation ? (I) Only PS I is functional. (II) Occurs is stroma lamellae. (III) Occurs when only light of wavelength less than 680 nm is available for excitation. (IV) Synthesis of both ATP and NADPH occurs. (V) Electrons are circulated within the photosystem.
The reaction centre of PS I is A and the reaction entre of PS II is
Both PS I and PS II operate
Statement A : PS II located in the appressed region of grana thylakoid. Statement B : PS II absorbs light of 680 nm of visible spectrum. Select correct option.
Read the following statements and state them as true (T) and false (F). (A) A photosystem consists of a reaction centre, LHC, and an electron acceptor. (B) The final acceptor of electrons during noncyclic flow of electron is NADP + (C) During phosphorylation, the chloroplast stoma become more acidic than the interior of thylakoid membrane. (D)The cytochrome system transports electron and pumps H + from stroma to thylakoid membrane. A B C D 1. T F F T 2. T T F T 3. F F T T 4. T T F F
Examine the figure given below and select the right option given all the four parts A,B,C and D correctly identified. A B C D 1. PS I Cytochrome b 6 f PS II CF 1 2. PS II Cytochrome b 6 f PS I CF 1 3. PS I Cytochrome b 6 f PS II CF 0 4. PS II Cytochrome b 6 f PS I CF 0
Enzyme ATPase is made up of two component F o and F 1 . Which of these undergo conformational changes due to the breakdown of proton gradient to release energy?
The NADP reductase is (i) Located on the stroma side of thylakoid membrane. (ii) Associated with noncyclic photophosphorylation. (iii) Associated with PS I.
C 3 plants require ( A ) ATP molecules and ( B ) NADPH molecules for fixation of one CO 2 . A B 1. 18 12 2. 3 2 3. 2 3 4. 5 2
Kranz anatomy is one of the features of the leaves of
The primary acceptor of CO 2 in sugarcane plant is
Study the cyclic pathway given below. Select the incorrect statement with respect to the above pathway.
How many plants given below have C 3 as well as C 4 pathways and mechanism that increase the concentration of CO 2 at the enzyme site during photosynthesis ? Wheat, maize, rice, potato, sugarcane, tomato, pearl millet, bell pepper, sorghum.
Read the following statements and select the correct option. (A) C 4 plants gave greater productivity of biomass. (B) C 4 plants have double carboxylation separation by time. (C) Chloroplast in bundle sheath cell lacks RuBisCo.
Substrate for photorespiration is
I. Primary CO 2 acceptor II. Extent of photorespiration III. Presence of Calvin cycle IV. Leaf anatomy V. Enzyme involved in first carbon dioxide fixation. Which one does not differ between C 3 and C 4 plants ?
Study the pathway given below. In which of the following options, correct words for all the three blanks A,B, and C. A B C 1. Carboxylation Reduction Regeneration 2. Fixation Carboxylation Reduction 3. Fixation Decarboxylation Regeneration 4. Carboxylation Decarboxylation Recarboxylation
Current availability of CO 2 levels in atmosphere is limiting to all, except
Relationship between incident light and CO 2 fixation rate is: (a) sigmoid at low light intensity. (b) linear at low light intensity. (c) constant at high light intensity.
CO 2 saturation point for C 3 plants (A) and C 4 plants (B) is A B 1. 360 μL / L 450 μL / L 2. 450 μL / L 360 μL / L 3. 250 μL / L 150 μL / L 4. 360 μL / L 650 μL / L
Plants responding to higher concentration of CO 2 show increased rates of photosynthesis, leading to higher productivity. This feature has been used for some greenhouse crops such as
Photorespiration is absent in:
Kranz anatomy is found in:
Choose the incorrect match
During photorespiration or C 2 pathway, the intermediate which is subjected to oxidation, decarboxylation and deamination is
Action spectrum of photosynthesis was given by
Which of the following statement is incorrect about light reaction of photosynthesis?
Identify the essential photosynthetic pigment.
Which of the following factor is the most limiting in nature for photosynthesis in C 3 plants?
How many ATP and NADPH are required for synthesis of 3 molecules of sucrose in C 4 plants?
In Sorghum, optimum CO 2 concentration for photosynthesis is
Choose the correct statement.
Choose the correct statement.
Chlorophyll pigments are present in
Identify the correct statement: (a) Lumen of chloroplast serves as reservoir of protons (H + ) and site for photolysis of water. (b) Chloroplasts are self-duplicating cell organelles. (c) The ribosomes of the chloroplasts are smaller (70S) than the cytoplasmic ribosomes (80S).
Identify the first stable product of CO 2 fixation during Calvin cycle.
Choose the correct statement.
Identify the person who was awarded noble prize for mapping of the pathway of carbon assimilation in photosynthesis.
Identify the incorrect statement regarding accessory pigments.
Photosynthesis is:
Choose the correct combination for photosynthesis.
Identify the correct statement.
What is the fate of CO 2 after the completion of photosynthesis?
The main purpose of photosynthesis is to:
Moll’s half leaf experiment proves that:
Who demonstrated that air has an essential role to play in the growth of green plants?
Who inferred that the O 2 evolved by the green plant comes from H 2 O , not from carbon dioxide?
Identify the technique which is used to separate leaf pigments like chlorophylls, xanthophylls, carotenes.
Choose the incorrect statement w.r.t. color of different photosynthetic pigments.
Which of the following substances have ability to absorb light at specific wavelength?
Which of the following statement is incorrect about accessory pigments?
Which is the most abundant plant pigment in the world?
Choose the incorrect statement.
Identify the correct statement.
Who proposed the Z-scheme of two photosystems?
Who proposed chemiosmotic theory of ATP synthesis?
ATP synthase enzyme ( F 0 – F 1 particles) are found in:
Who traced the pathway of carbon fixation in photosynthesis by using CO 2 14 ?
Present CO 2 concentration in atmosphere is limiting for:
During cloudy days, which of the following factors acts as limiting factor for photosynthesis
In C 3 plants, increase in incident light beyond saturation point result in:
Relationship between incident light and CO 2 fixation rates is linear at:
In which regions of light spectrum is maximum photosynthesis observed?
Which of the following is major limiting factor for photosynthesis in higher plants?
Which of the following statement is correct for plants at low light conditions?
If a plant is subjected to very high light intensities.
Which of the following does not represent the internal factors which affect photosynthesis?
Choose the correct statement with respect to photosynthesis.
Night acidification occurs in:
One of the following metabolic process is seen in C 3 but negligible or absent in C 4 plants.
For each RuBP involved in dark reaction, the formation of 3-phosphoglyceric acid molecules is decreased to half when there is operation of the following pathway.
RuBP carboxylase activity is observed in all expect:
Organic acid transported from mesophyll cells to bundle sheath cells in a C 4 plant is:
Primary CO 2 acceptor in a C 4 plant is:
Which alga was used by Calvin and his associates during photosynthetic research?
Increase in atmospheric CO 2 concentration beyond which level can become damaging over longer periods?
During light reactions in a chloroplast, highest number of protons are found in:
Which of the following plants respond to higher temperature with enhanced photosynthesis?
Light can become an important limiting factor for which types of plants?
How many light quanta or photons are required for the liberation of one oxygen molecule during the process of photosynthesis?
Event common to both cyclic and non-cyclic photophosphorylation is:
Which of the following type of oxygen gas will be released on providing heavy water (H 2 O 18 ) to a photosynthetic system?
In which region of light spectrum is minimum rate of photosynthesis observed?
Blue green pigment found in all green plants is:
Select the incorrect statement.
Law of limiting factor was proposed by:
Match Column I with Column II: Column I Column II (a) Action spectrum of photosynthesis (i) Julius Von Sachs (b) Production of glucose when plant grows (ii) B. Joseph Priestly (c) Only the green part of plants could release oxygen (iii) T.W. Engelmann (d) Role of air in the growth of green plants (iv) Jan Ingenhousz
Match the columns: Column I Column II a. Two carboxylations are separated by space i. Photochemical Phase b. Two carboxylations are separated by time ii. C 4 plants c. Production of ATP and NADPH+H + iii. CAM plants d. Fixation of O 2 and release of CO 2 iv. Photorespiration
Choose the correct statement with respect to photorespiration.
The net requirement of assimilatory powers for the formation of 1 hexose molecules in C 3 plant is:
During photosynthesis, where do the light independent reactions take place?
Formation of ATP, NADPH+H + and release of oxygen occur during:
Identify the incorrect statement.
A graph whereby the absorption of light by a pigment measured as relative absorbance is plotted as a function of wavelength. The resulting graph is known as
All are responsible for establishment of proton gradient across the thylakoid membrane except:
For carboxylation reaction in C 4 plants which amongst the following enzymes is/are involved: (a) RuBisCO (b) PEPcase (c) Pyruvate orthophosphate dikinase (d) Ribulose-5-phosphate kinase.
The accessory pigments are known as shield pigments because
Choose the correct statement.
C 4 plants are different from C 3 plants in
Find the correct match.
All of the following are included in the photochemical phase of photosynthesis, except
C 3 cycle was first discovered in
Statement A: Rubisco of bundle sheath cells of C 4 plants shows more carboxylase activity than the mesophyll cells of C 3 plants. Statement B: High CO 2 concentration is maintained in bundle sheath cells of C 4 plants than in mesophyll cells of the same plant.
In one turn of Calvin cycle how many ATP and NADPH are consumed?
Which one of the following is not involved in cyclic electron transport of photosynthesis?
Which is the bifunctional enzyme?
Statement A : Cyclic electron transport of photosynthesis takes place in both grana lamellae and stroma lamellae. Statement B: PSI is present in both grana lamellae and stroma lamellae.
Statement A: RuBisCo of C 4 plants shows high carboxylation activity than the Rubisco of C 3 plants. Statement B: High intracellular CO 2 concentration is maintained in mesophyll cells than in the bundle sheath cells of C 4 plants.
Which is true for PS II?
Characteristics C 3 C 4 Cell type in which the initial carboxylation reaction occurs Mesophyll A Number of carbons in the primary CO 2 acceptor B 3
Choose the correct statement.
The primary CO 2 acceptor molecule in C 3 cycle is a
The chlorophyll molecule in reaction center of PS II has maximum absorption at
Select the incorrect one about Photosystem I.
Photosynthetic pigments are located in the
During the dark reaction, 3-PGA is derived from
Enzyme ribulose bisphosphate carboxylase oxygenase is located in :
In an experiment, the carbon dioxide available to a C 3 plant was labelled with a radioactive isotope and the amount of radioactivity in the chloroplast was measured. As photosynthesis proceeded, in which of the following molecules did the radioactivity first appear?
Who first discovered the photosynthesis process?
The amount of water required to form one molecule of glucose in a photosynthetic reaction is
Algae float on water during day time and sink during night time because
In biochemical phase, fixation of carbon dioxide occurs by
The correct sequence of cell organelles involved in photorespiration is
The carbon dioxide acceptor in the Calvin cycle is
In the hypothesis given by a Peter Mitchell, where will we observe the accumulation of hydrogen ions (protons) in the cell?
T.W. Englemann performed his experiments on which of the following?
If the light is made unavailable then the biosynthetic phase of photosynthesis
In leaves of C 4 plants, malic acid synthesis during CO 2 fixation occurs in
C 4 plants are most efficient plants of tropical climate and
Who gave the “law of limiting factors”?
Presence of bundle sheath is a characteristic of
CAM pathway operates in
What is the location of water splitting complex associated with PS II?
Which light is absorbed more by Chlorophyll ‘a’?
In the C4 cycle, the 4 carbon-containing acids are formed in
In C 4 plant fixation of CO 2 (by RuBisCO enzyme) occur at which place
The diagram below shows three plants with identical leaf surface areas: Assuming all other conditions were identical for all three plants, which of the plants would like to photosynthesize slowest and fastest.
In which of the following options correct words for all three blanks X, Y, & Z indicated?
Read the following statements (A-D) carefully. A. Causes the 25% loss of CO2 fixed by Calvin-Benson cycle. B. Operates in chloroplasts, leaf peroxisomes and mitochondria. C. Absent in photosynthestic bacteria. D. Does not produce ATP Which light-dependent phenomenon has been described by the above statements?
In photosynthesis, light reaction includes :
Select the incorrect pairing.
In the leaves of C 4 plants, malic acid formation during CO 2 fixation occurs in the cells of
Carbon dioxide joins the photosynthetic pathway in
The example of C 4 plants is
Chemiosmotic theory of ATP synthesis in chloroplast & mitochondria is based on
Mg 2+ is the activator of
