Biomolecules MCQs | NCERT Biology | NEET Exam
Chapter-wise multiple choice questions (MCQs) on 'Biomolecules' for NEET aspirants, based on NCERT Biology Class-11 (Chapter-9) with Answer Key and Solutions.
1. Question
Read the book NCERT Biology class-11 (chapter- 9): Biomolecules from here.
1. Question
Select a fatty acid from the following:
Acetic acid
Palmitic acid
Glutamic acid
Aspartic acid
Correct Answer
Wrong Answer
2. Question
Read the following statements carefully and choose the option that is incorrectly explained.
- Proteins are chains of amino acids which are linked by peptide bonds.
- Inulin is a polymer of fructose.
- Starch can hold I2 molecules in the helical portion.
- The sugar found in polynucleotides is always ribose.
1
2
3
4
Correct Answer
Wrong Answer
3. Question
Which one is covalent bond among following in protein 3-D form ?
H-bond
Hydrophobic
Electrostatic bond
Disulfied bond
Correct Answer
Wrong Answer
4. Question
The 20 different amino acid have different :-
R-group
Carboxylic group
Peptide bond
Amino group
Correct Answer
Wrong Answer
5. Question
Assertion : Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat.
Reason : Almost all enzyme are proteinaceous in nature and some are ribozyme.
Both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
Both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
Assertion is True but the Reason is False.
Both Assertion & Reason are False.
Correct Answer
Wrong Answer
6. Question
When apoenzyme is separated from its metal component, its activity is :
First decreased then increased
Increased
Lost
Not affected
Correct Answer
Wrong Answer
7. Question
Adenine + Ribose + Phosphate form :
adenosine
adenylic acid
adenosine diphosphate
denosine triphosphate
Correct Answer
Wrong Answer
8. Question
In a protein chain the first amino acid is also called :
N – terminal amino acid
C – terminal amino acid
Both of them
Valine
Correct Answer
Wrong Answer
9. Question
True statement for cellulose molecule:
β - 1'- 4" linkage, unbranched
β - 1'- 4" linkage, branched
α - 1' - 4" linkage, branched
β - 1' - 6" linkage, unbranched
Correct Answer
Wrong Answer
10. Question
Glycerol is also known as :
Dihydroxy ethane
Trihydroxy propane
Tetrahydroxy butane
Trihydroxy methane
Correct Answer
Wrong Answer
11. Question
Select the correct option, which represents the homopolysaccharides made up of glucose monomers:
Sucrose, lactose, maltose
Chitin, glycogen, starch
Starch, inulin, peptidoglycan
Starch, glycogen, cellulose
Correct Answer
Wrong Answer
12. Question
Given below are two statements:
Statement I: Adult Human haemoglobin consist of 8 subunits.
Statement II : The enzymes isolated from organisms who normally live under extremely high temperatures (e.g. hot vents and sulphur springs), are stable and retain their catalytic power at high temperatures (up to 800–900C).
Choose the correct answer from the option given below:
Both Statement I and Statement II are incorrect
Statement I is correct but Statement II is incorrect
Statement I is incorrect but Statement II is correct
Both Statement I and Statement II are correct
Correct Answer
Wrong Answer
13. Question
Select the correct option for the given diagram:
A–Transition state
B–Activation energy without enzyme
C–Activation energy with enzyme
All
Correct Answer
Wrong Answer
14. Question
Select the correct match:
Palmitic acid → Lipids
Adenylic acid → Lipids
Adenine → Amino acid
Alanine → Nitrogen bases
Correct Answer
Wrong Answer
15. Question
Select the correct match:
| A. α-helix | I. Cellulose |
| B. Plant cell wall | II. Secondary structure |
| C. Primary structure of protein | III. Positional information in a protein |
| D. DNA | IV. Deoxyribose |
A-III, B-I, C-IV, D-II
A-II, B-I, C-III, D-IV
A-IV, B-I, C-II, D-III
A-IV, B-III, C-I, D-II
Correct Answer
Wrong Answer
16. Question
Select the incorrect match for secondary metabolites:
Anthocyanins → Pigments
Abrin → Toxin
Codeine → Alkaloids
Concanavalin A → Drugs
Correct Answer
Wrong Answer
17. Question
Which one of the following is/are a type of enzyme:
β-galactosidase
Lysozyme
Chitinase
All
Correct Answer
Wrong Answer
18. Question
Select the correct match:
| Column A | Column B |
|---|---|
| A. 3C | I. Citric acid |
| B. 4C | II. α-ketoglutaric acid |
| C. 5C | III. Fumaric acid |
| D. 6C | IV. Pyruvic acid |
A–IV, B– III, C–II, D–I
A–I, B– II, C–III, D–IV
A–II, B– I, C–III, D–IV
A–III, B– IV, C–II, D–I
Correct Answer
Wrong Answer
19. Question
Given below are two statements
Statement I: Amino acids are organic compounds containing an amino group and an acidic group as substituents on the same carbon i.e. the α-carbon. Hence, they are called α-amino acids.
Statement II: Living organisms have a number of carbon compounds in which heterocyclic rings can be found. Some of these are nitrogen bases Adenine, Guanine, Cytosine, Uracil
and thymine.
Choose the correct answer from the option given below:
Both Statement I and Statement II are incorrect
Statement I is correct but Statement II is incorrect
Statement I is incorrect but Statement II is correct
Both Statement I and Statement II are correct
Correct Answer
Wrong Answer
20. Question
Given below are two statements , one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): A protein is a heteropolymer and not a homopolymer.
Reason (R): Protein is a polymer of different type of amino acids.
Choose the most appropriate answer from the options given below :
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
(A) is correct but (R) is not correct
(A) is not correct but (R) is correct
Both (A) and (R) are correct and (R) is the correct explanation of (A)
