Biomolecule PYQ JEE mains solved questions are given in this article. The activities performed by living beings include responses to specific natural mixtures. Such mixtures are called biomolecules. These are fundamental natural atoms, which are engaged with the upkeep and metabolic cycles of living beings.
The inquiries given here to give you a thought regarding what kind of biomolecules previous year questions JEE mains to anticipate from the subject biomolecule. Infinity Learn gives solutions made by our master team.
1. Observation of “Rhumann’s purple” is a corroborative test for the presence of:
(1) Starch
(2) Reducing sugar
(3) Cupric particle
(4) Protein
Solution:
Rhumann’s purple is ninhydrin. It is utilized to recognize alpha-amino corrosive or carboxylic corrosive. While contact with the free amines (proteins), a dark blue or purple tone known as Ruhemann’s purple is created. So observation of “Rhumann’s purple” is a corroborative test for the presence of protein.
Consequently choice (4) is the answer.
2. Amalgamation of every atom of glucose in photosynthesis includes:-
(1) 18 atoms of ATP
(2) 10 atoms of ATP
(3) 8 atoms of ATP
(4) 6 atoms of ATP
Solution:
12H2O + 12 NADP + 18 ADP → 6O2 + 18 ATP + 12 NADPH ( light response)
6CO2 + 12 NADPH + 18 ATP → C6H12O6 + 12 NADP + 18 ADP + 6H2O (dull response)
6CO2 + 6H2O → C6H12O6 + 6O2 (Net response)
18 atoms of ATP is engaged with the combination of every particle of glucose in photosynthesis.
Henceforth choice (1) is the answer.
3. Collection of which of the accompanying atoms in the muscles happens because of enthusiastic activity:-
(1) Pyruvic corrosive
(2) L-lactic corrosive
(3) Glycogen
(4) Glucose
Solution:
Because of overwhelming activity, the collection of L-lactic corrosive in the muscles occurs. This is a consequence of anaerobic breath.
Subsequently choice (2) is the answer.
4. Which of the nutrients given beneath is water-solvent?
(1) Vitamin E
(2) Vitamin K
(3) Vitamin C
(4) Vitamin D
Solution:
L-ascorbic acid is a water-solvent nutrient. It is likewise called ascorbic corrosive.
Consequently choice (3) is the answer.
5. Biuret test isn’t given by:-
(1) proteins
(2) starches
(3) polypeptides
(4) urea
Solution:
The Biuret test is given by an amide linkage. It is available in proteins, polypeptides and urea. It is absent in carbs.
Consequently choice (2) is the answer.
6. RNA is not the same as DNA since RNA contains
(1) ribose sugar and thymine
(2) ribose sugar and uracil
(3) deoxyribose sugar and thymine
(4) deoxyribose sugar and uracil
Solution:
RNA is not quite the same as DNA since RNA contains ribose sugar and uracil base.
Henceforth choice (2) is the answer.
7. Which base is present in RNA and yet not in DNA?
(1) Uracil
(2) Thymine
(3) Guanine
(4) Cytosine
Solution:
Uracil is available in RNA, yet not present in DNA.
Consequently choice (1) is the answer.
8. The term anomers of glucose implies to
(1) isomers of glucose that vary in configurations at carbons one and four(C-land C-4)
(2) a combination of (D)- glucose and (L)- glucose
(3) enantiomers of glucose
(4) isomers of glucose that vary in the arrangement at carbon one (C-l)
Solution:
An anomer is an epimer at the hemiacetal or hemiketal carbon in a cyclic saccharide, a molecule called the anomeric carbon. Anomer is an illustration of a stereoisomer. The carbon molecule at position 1 is anomeric.
Henceforth choice (4) is the answer.
9. Which pyrimidine bases are available in DNA?
(1) cytosine and adenine
(2) cytosine and guanine
(3) cytosine and thymine
(4) cytosine and uracil
Solution:
In DNA cytosine and thymine, two pyrimidine bases present
Consequently choice (3) is the answer.
10. The optional construction of a protein alludes to
(1) a – helical spine
(2) hydrophobic collaborations
(3) grouping of a-amino acids
(4) fixed arrangement of the polypeptide backbone
Solution:
The optional construction of protein incorporates a-helical back security and R-sheet structures.
Consequently choice (1) is the answer.
11. Which one of the accompanying possibilities is right?
(1) All amino acids with the exception of lysine are optically dynamic
(2) All amino acids are optically dynamic
(3) All amino acids with the exception of glycine are optically dynamic
(4) All amino acids with the exception of glutamic acids are optically dynamic
Solution:
Glycine contains two hydrogen particles at the alpha carbon.
All amino acids with the exception of glycine are optically dynamic.
Consequently choice (3) is the answer.
12. Which of the accompanying mixtures can be recognized by Molisch’s test?
(1) Nitro compounds
(2) Sugars
(3) Amines
(4) Primary alcohols
Solution:
Molisch’s test is a test for the presence of carbs. The development of a purple or a purplish-red ring at the resource between the H2SO4 and the analyte + Molisch’s reagent blend affirms the presence of carbs in the analyte. The two types of carbs are sugars and starches. So sugars can be distinguished by Molisch’s test.
Henceforth choice (2) is the answer.
13. The availability or non-availability of hydroxy gathering on which carbon molecule of sugar separates RNA and DNA?
(1) third
(2) fourth
(3) first
(4) second
Solution:
In RNA, ribose is available on the second carbon particle. In DNA, deoxyribose is available on the second carbon atom. Thus, the presence or nonappearance of hydroxy gathering on the second carbon particle of sugar separates RNA and DNA.
Thus choice (4) is the answer.
14. Which α-D (+)- glucose and β-D(+)- glucose are present?
(1) conformers
(2) epimers
(3) anomers
(4) enantiomers
Solution:
α-D (+)- glucose and β-D(+)- glucose is two anomers present.
Thus choice (3) is the answer.
15. Complete hydrolysis of cellulose gives
(1) D-ribose
(2) D-glucose
(3) L-glucose
(4) D-fructose
Solution:
Complete hydrolysis of cellulose gives D-glucose.
(C6H10O5 )n + nH2O → nC6H12O6
Thus choice (2) is the answer.
Q. What are Carbohydrates?
Ans: Carbohydrates are biomolecules containing carbon, hydrogen and oxygen iotas. They are the wellspring of energy for living creatures. We can experience sugars every step of the way of our life. For instance, the paper that we utilize every day, the wood, and so forth contain cellulose. As far as biomolecules, the equivalent word of carbs is saccharides which incorporate a gathering of sugar, starch and cellulose. Sugars are named:
Amino acids are biomolecules that contain two functional groups specifically: carboxylic corrosive and amine. They are the subsidiaries of carboxylic acids wherein one hydrogen particle of a carbon molecule is subbed by an amino gathering. The critical components of an amino corrosive are carbon, hydrogen, oxygen and nitrogen through different components may likewise be connected. Amino acids are characterized by the area of the primary useful gatherings like alpha, beta, gamma, or delta. Amino acids are the structure squares of proteins, lipids. Proteins are the second biggest part of muscles, cells or tissues in the human body.
Yes, biomolecules are an important topic for JEE Mains, particularly in the Chemistry section under the "Organic Chemistry" chapter. Questions related to the structure, function, and properties of biomolecules like carbohydrates, proteins, lipids, enzymes, and nucleic acids often appear. While it may not be as extensive as other topics, having a clear understanding of biomolecules can give you an edge in both JEE Mains and other competitive exams. It's important to focus on their chemical properties, biological significance, and related reactions.
Yes, you can study biomolecules without an in-depth knowledge of GOC (General Organic Chemistry). However, having a basic understanding of GOC concepts like functional groups, isomerism, and reactions can help you understand the chemical nature of biomolecules more easily. Biomolecules involve organic compounds, so while GOC is not a prerequisite, knowledge of it will make it easier to grasp reactions and mechanisms related to biomolecules. If you're comfortable with the basics of organic chemistry, you can start studying biomolecules directly.