When 12H + pass through F 0 – F 1 particle, how many ATPs are produced?
Pyruvate dehydrogenase catalyzes the conversion of
Identify X , Y and Z. X Y Z 1. GTP NADH 2 CO 2 2. FADH 2 NADH 2 GTP 3. NADH 2 FADH 2 GTP 4. CO 2 NADH 2 ADP
Find the incorrect match.
During aerobic respiration, the passing on of the electrons removed as a part of the hydrogen atom to molecular O 2 occurs in the
Cytochromes are found in
Conversion of fructose 1, 6-bisphosphate to glyceraldehyde 3 phosphate and dihydroxyacetone phosphate, is catalysed by
In mitochondrial ETC, cytochrome c is a A protein attached to the B surface of inner membrane. A B 1. Small Outer 2. Large Outer 3. Small Inner 4. Large Inner
Which of the following justifies the amphibolic nature of respiratory pathway rather than a purely catabolic one ?
What will be the value of R.Q. when proteins are used as respiratory substrate?
Which amongst the following condition in the cell maximizes the ATP synthesis during aerobic respiration?
Identify the incorrect statement about glycolysis.
Which of the given below substrates can enter into glycolysis for aerobic breakdown ? A. Proteins B. Glycerol C. Fatty acids D. Fructose
How many reduced coenzymes are produced during the aerobic breakdown of a molecule of pyruvic acid through Krebs’ cycle?
Select the correct option w.r.t. increasing order of respiratory quotient of various substrates.
Which of the following is correctly related to aerobic respiration?
Pyruvic acid, the key product of glycolysis can have many metabolic fates. Under aerobic condition, it forms .
Pyruvate dehydrogenase is used in converting
During which stage in the complete aerobic oxidation of glucose is the greatest number of ATP molecules produced from ADP?
The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products. Arrows numbered 4, 8 and 12 can all be
Which statement is wrong for Krebs’ cycle?
What is the role of NAD+ in cellular respiration?
If Acetyl Co A is the respiratory substrate, what is the Respiratory Quotient in aerobic respiration?
The number of decarboxylations that occur in one turn of citric acid cycle is:
The respiratory quotient of fats is:
Which is incorrect w.r.t. Krebs’ cycle?
What is the role of NAD+ in cellular respiration?
Substrate level phosphorylation in aerobic respiration
ATP formation by transfer of phosphate group from substrate to ADP is called
Yeasts poison themselves to death when the concentration of alcohol reaches about:
Identify the step in which NADH + H + is oxidised to NAD +
Which of the following is associated complex IV in mitochondrial ETS ?
Which among the following inhibits electron transport between cyt a 3 and oxygen ?
Intermediate common to fatty acid and carbohydrate oxidation is .
RQ (respiratory quotient) (A) is the ratio of the volume of CO 2 taken in and volume of oxygen evolved in respiration. (B) depends upon the type of respiratory substrate used during respiration.
2 C 51 H 98 O 6 + 145 O 2 102 CO 2 + 98 H 2 O + Energy The RQ of the above reaction is
ATP synthase is an integral part of:
Before entering the TCA cycle, pyruvic acid is converted to acetyl CoA by:
Tricarboxylic acid cycle (TCA) starts with condensation of:
Which is the first formed tricarboxylic acid in tricarboxylic acid cycle?
Organic compound subjected to biological oxidation in a cell is called:
Match Column I with Column II Column I Column II (a) Complex I (i) Cytochrome bc 1 complex (b) Complex II (ii) Cytochrome c oxidase complex (c) Complex III (iii) Succinate dehydrogenase complex (d) Complex IV (iv) NADH dehydrogenase complex
The conversion of pyruvate to acetyl CoA during aerobic respiration of plants or any eukaryote takes place in
Statement A: Complex V consists of two major components, F 1 and F 0 Statement B: The F 1 headpiece is an integral membrane protein complex and contains the site for synthesis of ATP from ADP and inorganic phosphate.
Identify the incorrect statement.
In which step of respiration is substrate level phosphorylation not observed?
During respiratory electron transport system, Cytochrome c carries electrons from
What is the net gain of ATP molecules for the complete aerobic breakdown of a molecule of glucose?
Statement A : RQ for pyruvic acid in aerobic respiration is 1 or unity. Statement B: Pyruvic acid is a sugar.
Which of the following statement is incorrect about photosynthesis?
In Kreb’s cycle the FAD participates as an electron acceptor during the conversion of
The given experimental set-up demonstrates:
Which of the following statement related to Kreb’s cycle is not correc t?
Select the CORRECT sequence of formation of given intermediates of Kreb’s cycle.
Which of the metabolites is common to respiration-mediated breakdown of fats, carbohydrates and proteins?
In which one of the following processes CO 2 is not released?
The product of enolase reaction of glycolysis is
Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?
Oxidative phosphorylation is
Which of these statements is incorrect?
Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalysed by
Respiratory Quotient (RQ) value of tripalmitin is
When a molecule of Glucose is aerobically oxidized, there is
Choose the incorrect statement with respect to Glycolysis.
The product of enolase reaction of glycolysis is
Choose the correct statement with respect to respiration.
Number of oxidation reactions in one turn of Tricarboxylic acid cycle is
Among the following of Electron Transport system of aerobic respiration, which have Fe-S proteins as electron carriers? I. Complex II II. Complex III III. Complex IV IV. Complex I
An intermediate of Krebs cycle is oxidized by a component of inner membrane of mitochondrion. The intermediate and the component of inner membrane are respectively
The number of substrate level phosphorylations in one turn of citric acid cycle is :
The net gain of ATP in anaerobic breakdown of a molecule of Glucose is
Pyruvate dehydrogenase activity during aerobic respiration requires :
Where is respiratory electron transport system (ETS) located in plants ?
Which of the following values will depict correct respiratory quotient when tripalmitin (a fatty acid) is used as a respiratory substrate?
Statement A: Cytochrome c oxidase has both Cu and Fe. Statement B: Cytochrome c oxidase reduces oxygen.
During the process of aerobic breakdown of glucose, arrange the involvement of following parts of eukaryotic cell in correct sequence. A. F 0 B. F 1 C. Cytoplasm D. Inner membrane of mitochondrion
Oxidative decarboxylation is observed in which step of aerobic respiration?
Which of the following is correct.
At the end of glycolysis, six carbon compound ultimately converted into
The product of substrate level phosphorylation reaction of Krebs cycle is
The mobile electron carrier of respiratory electron transport system is
The end products of alcoholic fermentation are
During aerobic breakdown of glucose, what are the intermediates of respiration formed due to decarboxylation? A. Isocitric acid B. Acetyl CoA C. α-keto glutaric acid D. Succinyl CoA
Read the following statements w.r.t cellular respiration and select the correct option. A. The breaking of C-C bonds of complex compounds through oxidation always occurs in the absence of oxygen. B. All the energy present in respiratory substrate is not released free into the cells. C. Energy is released in a series of slow stepwise reactions in enzymes. D. The energy released by breakdown of C-C bonds is not used directly for cell metabolism.
Traditionally respiration is a/an
Read the following statements and state true(T) or false(F) A. All reactions in respiration are controlled by the specific enzymes. B. Proteins, fats and organic acids may be used as respiratory substrates in plants. C. Energy released by breakdown of respiratory substances is trapped as chemical energy in the form of ATP. A B C 1. T T T 2. T F T 3. T F F 4. F F T
Type of respiration where respiratory substrate is protein, called as
Floating respiration refers when respiratory substrates is/are. A. Fat B. Carbohydrate C. Protein
Common source of energy for cellular activities.
All are true about glycolysis, except
Which of the following enzyme is used to convert sucrose into the glucose and fructose that readily enter glycolytic pathway?
In glycolysis, conversation of glyceraldehyde-3 phosphate to 1,3 bisphosphoglyceric acid is catalyzed by which of the following enzyme?
Net production through glycolysis is Pyruvate ATP NADH 1. 2 2 2 2. 2 4 2 3. 1 2 4 4. 2 4 4
Site of glycolysis in prokaryotic cell is
Which metabolic pathway is common pathway in both anaerobic and aerobic respiration?
Which is true for glycolysis?
Identify the true (T) or false (F) statements(s) w.r.t. EMP pathway : A. It involves partial breakdown of glucose into two molecules of pyruvate without yielding redox equivalents. B. ATP is utilized in two steps and ATP is formed in one step. C. Decarboxylation and oxidation occur during glycolysis. D. The enzymes involved in the chemical reaction of glycolysis are located in the cytoplasm. A B C D 1. F F F T 2. T T F F 3. T F F T 4. F T T T
What occurs in glycolysis?
During glycolysis (i) Fructose-6-phosphate is changed to fructose-1,6- diphosphate by A . (ii) Fructose-1,6-diphosphate splits into two triose phosphate by enzyme A B . A B 1. Phosphofructokinase Aldolase 2. Aldolase Phosphofructokinase 3. Aldolase Enolase 4. Phosphofructokinase Enolase
Which of the following enzyme is not required during fermentation in microbes?
Isomerization of 3-PGA into 2-PGA step takes place in
During vigorous exercise, when oxygen is inadequate for cellular respiration, reduction of pyruvic acid catalyzed by
What is the maximum concentration of alcohol of which yeast cells poison themselves death?
Select incorrect statement for process of fermentation by lactic acid bacteria.
During the process of anaerobic respiration
Decarboxylation is not a feature of
Substrate entrant of TCA cycle is: (a) 3-carbon compound formed in cytoplasm (b) Formed in mitochondrial matrix through oxidative decarboxylation of pyruvic acid (c) Two carbon compound acetyl-CoA
Ratio of CO 2 produced in aerobic and anaerobic respiration of alcoholic fermentation when one glucose is oxidised?
The substrate for the first decarboxylation reaction in the Krebs cycle is:
(i) A is the site of complete oxidation of pyruvate by the stepwise removal of all the hydrogen atoms. (ii) B CO 2 molecules are released in the above process. A B 1. Mitochondrial matrix 3 2. Perimitochondrial space 2 3. Mitochondrial matrix 6 4. Inner mitochondrial membrane 3
Conversion of citrate into isocitrate in Kreb’s cycle occurs with the help of enzyme A and cofactor B respectively. A B 1. Aconitase Fe ++ 2. Aconitase Mn ++ 3. Isocitrate dehydrogenase Fe ++ 4. Citrate synthetase Mg ++
Mobile electron carrier in ETS of mitochondria are
The figure given below shows the structure of ATP synthetase with its two parts labelled (A) and (B). Select the part incorrectly matched with its structure/function.
In TCA cycle, GTP is formed during conversion of
Which of the following respiratory substrate has RQ value more than one ? (a) Oxalic acid (b) Tripalmitin (c) Malic acid
Which intermediate compound of Kreb’s cycle is involved in the synthesis of amino acid ?
How many oxygen atoms are required during complete oxidation of 1 molecule of PGAL in aerobic respiration?
All the cells respire except:
Read the following statements and identify the correct one: (a) Light energy is not used directly or indirectly to develop proton gradient during oxidative phosphorylation (b) The energy currency of the cell is chemically a lipo-protein (c) Complex V is associated with ATP synthesis and not electron transport
Arrange the following respiratory substrates in the sequence of increase in R.Q. during aerobic respiration. A. Carbohydrates B. Lipids C. Organic acids D. Proteins
Conversion of pyruvic acid into ethyl alcohol is facilitated by the enzyme(s)-
Which one of intermediate of TCA cycle is formed by the action of an enzyme present in the inner membrane of mitochondrion but not matrix enzymes.
When tripalmitin is the respiratory substrate-
Which enzyme converts sucrose into glucose and fructose?
How many ATP molecules are produced during oxidative phosphorylation, if one molecule of pyruvate is used as respiratory substrate?
In which of the following reactions substrate level phosphorylation does not occur?
What is the net gain of ATP for two molecules of glucose in fermentation?
The enzyme succinate dehydrogenase of Kreb’s cycle is present in
Which class of enzymes are not associated with glycolysis during the conversion of glucose to pyruvic acid?
The product of last decarboxylation reaction of aerobic respiration is
Which of the following reactions are associated with isomerisation reaction? a. Conversion of glucose-6-Phosphate to Frustose-6-phosphate b. Conversion of phosphoenol pyruvate to pyruvic acid c. Conversion of dihydroxy acetone phosphate to glyceraldehyde-3-phosphate d. Conversion of 3-phosphoglyceric acid to 2-phosphoglycerate
The products of decarboxylation reactions of Kreb’s cycle are A. Acetyl Co.A B. α -keto glutaric acid C. Succinyl Co.A D. Acetaldehyde
Which of the following statements are correct w.r.t respiration? (a) It is involved in breaking of the C-C bonds of complex compounds through oxidation within the cells. (b) It releases considerable amount of energy locked in organic compounds. (c) Photorespiration takes place only in mitochondria and cytoplasm during which oxygen is consumed.
Identify the correct match:
Select the correct statements (a) Roots, stems and leaves respire at rates far lower than animals do. (b) Diffusion is involved during respiration in plants. (c) Distance that gases must diffuse even in large, bulky plants is not great.
How many molecules of ATP are utilized for the production of two molecules of pyruvic acid from glucose during glycolysis?
If 2 molecules of 1,3 bisphosphoglyceric acid enter into glycolytic pathway, how many ATP are produced by the completion of glycolysis?
The site for glycolysis is:
What is the ratio of the number of pyruvic acid molecules and the number of NADH+H + produced during glycolysis from one molecule of glucose?
The partial oxidation of glucose to pyruvic acid by a series of enzymatic reactions is called:
During the redox reaction in glycolysis which molecule acts as an oxidizing and reducing agent respectively?
Match column I with column II Column I Column II (a) Glucose Glucose-6- Phosphate (i) Pyruvate kinase (b)Fructose-6-Phosphate Fructose-1,6-Bisphosphate (ii) Hexokinase (c) Phosphoenolpyruvate Pyruvic acid (iii) Enolase (d) 2-phosphoglycerate Phosphoenolpyruvate (iv) Phosphofructokinase
Identify the step which shows neither phosphorylation nor dephosphorylation during glycolysis.
Which of the following reaction does not occur during glycolysis?
ATP formation during the conversion of phosphoenolpyruvate to pyruvic acid of glycolysis is described as:
Statement A: Energy currency of a cell is a ribonucleotide Statement B:Cell membrane is not involved in respiration in any living organism
Decarboxylation reactions do not occur in which of these pathways? a. Conversion of Pyruvic acid to Acetyl CoA b. Krebs cycle c. Lactic acid fermentation d. Glycolysis
In which of the following steps production of NADH occurs during respiration? (a) Isocitric acid α-ketoglutaric acid (b) α-ketoglutaric acid Succinyl Co.A (c) Succinyl Co.A Succinic acid
Identify the incorrect statement.
Identify the correct statement. a. The maximum concentration of alcohol in naturally fermented beverages is up to 13% b. The net gain of ATP in both alcohol and lactic acid fermentation is 2. c. CO 2 is released during alcohol fermentation but not in lactic acid fermentation.
Identify the correct statement.
Identify the correct statement.
NADH is oxidised to NAD+ during
Select the correct statement with respect to aerobic respiration:
Identify the incorrect statement
Substrate level phosphorylation takes place in one of the following steps of Kreb’s cycle.
All the enzymes of the citric acid cycle are usually described as soluble components of the mitochondrial matrix except:
Most of the CO 2 released during aerobic respiration is released in
The number of ATP molecules formed by substrate level phosphorylation in glycolysis and krebs cycle during complete aerobic oxidation of one molecule of glucose is
The total of number of CO 2 and NADH+H + produced in Krebs cycle during aerobic breakdown of a molecule of glucose is
Identify the only 5-carbon compound that is produced as an intermediate in the Krebs cycle.
Malic dehydrogenase enzyme of aerobic respiration converts:
The tricarboxylic acid cycle is also known as the citric acid cycle because:
Citric acid is formed in the kreb cycle when
How many integral protein complexes of inner membrane of mitochondrion are involved in respiratory electron transport system?
The mobile electron carrier involved for the transfer of electrons between complex III and IV is
The site for respiratory electron transport in eukaryotes is:
Identify the step of aerobic respiration in which CO 2 is not released.
Ubiquinone carries electrons between (a) Complex I and Complex III (b) Complex II and Complex III (c) Complex III and Complex IV (d) Complex I and Complex II
Find the correct match
Identify the correct statements w.r.t . the role of oxygen in aerobic respiration. (a) The role of oxygen is limited to the terminal stage of the aerobic respiration. (b) The presence of oxygen is vital, since it drives the whole process by removing hydrogen from the system. (c) Oxygen acts as the final hydrogen acceptor.
How many molecules of ATP are produced through ETS in aerobic respiration if 1 molecule of Fructose-1,6- bisphosphate is used as a substrate?
Calculate the total number of ATP molecules produced if fructose-1,6- bisphosphate is used as a substrate for aerobic respiration.
Calculate the number of CO 2 produced if 1 molecule acetyl CoA is respired aerobically.
The net ATP produced during fermentation and aerobic respiration from the breakdown of a molecule of glucose are respectively
In which form would fatty acids enter into aerobic respiratory pathway?
Respiration involves breakdown of complex substances that drives the formation of complex substances. Therefore, it is better to call respiration as:
Statement A: When the organism needs to synthesize fatty acids, acetyl CoA would be withdrawn from the respiratory pathway for the synthesis. Statement B: Glycerol would enter the respiratory pathway after being converted to PGAl.
Identify correct statement.
The respiratory intermediate acetyl CoA is used for the synthesis of:
The site for fermentation in living cell is:
Which intermediate is a common meeting point or connecting link between fat, carbohydrate and protein catabolism?
Respiratory quotient is:
Identify the correct statement
The respiratory quotient for carbohydrates is:
What would be the RQ when proteins are used as respiratory substrate?
Match Column I with Column II Column I (Respiratory substrate) Column II (RQ) (a) Carbohydrates (i) more than one (b) Oxalic acid (ii) 1 (c) Proteins (iii) 0.7 (d) Tripalmitin (iv) about 0.9
What is the RQ when malic acid(C 4 H 6 O 5 ) is used as a respiratory substrate?
Calculate the number of FADH 2 molecule produced in Tricarboxylic acid cycle when 2 glucose molecules are aerobically degraded ?
Site for tricarboxylic acid cycle is in aerobic respiration of eukaryotes is
Identify the incorrect statement.
When fats are used as a respiratory substrate the RQ is:
Calculate the RQ from the equation given below 2 (C 51 H 98 O 6 ) + 145 O 2 102 CO 2 + 98 H 2 O+ energy
One of the following cytochromes of Electron transport chain of respiration is mobile electron carrier.
Water is utilised during the formation of the following intermediate of Krebs cycle.
Identify the correct statement w.r.t. the location and function of ubiquinone.
Glucose is phosphorylated to give rise to glucose-6-phosphate by the activity of:
What are the products of lactic acid fermentation?
Which of the following molecule is produced during the conversion of succinyl-CoA to succinic acid?
What happens when oxygen is inadequate for cellular respiration in muscle cells during exercise?
How many NADH+H + and FADH 2 molecules are produced in a single turn of TCA cycle?
Choose the correct statement with respect to glycolysis.
The second substrate level phosphorylation reaction in glycolysis is observed during the conversion of
Identify the incorrect statement.
In aerobic respiration, cytochromes are absent in which of the following complexes of electron transport system ?
One of the components of inner membrane of mitochondrion have both cytochromes and Fe.S centers.
In which step of citric acid cycle, FAD + is reduced to FADH 2 ?
In the dehydration reaction of glycolysis
Mobile electron carrier for transfer of electrons between complex III and IV during cellular respiration is:
Identify the step of respiration in which there is formation of NADH+H + from NAD + .
Select the incorrect match w.r.t. intermediates of Krebs cycle and their products
Which of the following steps of respiration takes place in cytoplasm?
The respiratory quotient is unity for
Hydrolysis is a ………….. reaction and in glycolysis at ……………….. steps the ATP is hydrolyzed.
First stage in respiration is
Oxidation of one molecule of glucose yields 38 molecules of ATP in the proportion of
The respiratory quotient varies due to
In presence of cyanide, azide and carbon monoxide, the rate of respiration
What is the role of NAD + in cellular respiration?
R.Q. is the ratio of
Statement I : Glycolysis is the first step of respiration in which glucose completely breaks into CO 2 and H 2 O Statement II : In this process, there is a net gain of twenty-four molecules of ATP.
Which of the following processes produce the maximum amount of ATP on the aerobic breakdown of one molecule of glucose?
Identify the biocatalyst that helps in obtaining the connecting link between glycolysis and Kreb’s cycle.
Correctly identify the energy-yielding step of glycolysis.
All enzymes of the TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in the cytosol in prokaryotes. This enzyme is
Aerobic respiration is called
What is the total gain of energy during this process?
Which of the following is the correct sequence of glycolysis?
Pyruvic acid is the initial substrate of
Which of the following steps during glycolysis is associated with utilization of ATP?
All enzymes of the TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is
How many ATP are produced when 12H + pass through F 0 -F 1 particles?
Which of the following statement is incorrect ?
The intermediate formed after second decarboxylation in Krebs cycle is
Which of the following cellular metabolic processes can occur both in the presence or absence of O 2 ?
Which of the following is the intermediate compound linking glycolysis to the Kreb’s cycle?
Study the following statements regarding the chemiosmotic hypothesis in mitochondria and select the CORRECT ones. (i) F 1 headpiece contains the site for the synthesis of ATP from ADP + Pi. (ii) F 0 part forms the channel through which protons crosses the inner membrane. (iii) For each ATP produced, 2H + pass through F 0 from the intermembrane space to the matrix down the electrochemical proton gradient.
Terminal cytochrome of respiratory chain which donates electrons to oxygen is
Which of the following reaction is associated with decarboxylation reactions during the Citric acid Cycle? (a) Isocitrate α -Ketoglutarate (b) α -Ketoglutarate Succinyl CoA (c) Succinate Fumarate (d) Pyruvate Acetyl CoA
Which intermediates of aerobic respiration are removed for lipid synthesis?