Carbohydrates are commonly found as starch in plant storage organs. Which of the

following five properties of starch (A-E) make it useful as a storage material?

(A) Easily translocated 

(B) Chemically non-reactive

(C) Easily digested by animals

(D) Osmotically inactive

(E) Synthesized during photosynthesis

The useful properties are 

1. (B) and (C)

2. (B) and (D)

3. (A), (C) and (E)

4. (A) and (E)

Subtopic:  Carbohydrates |
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched

with the category mentioned against it?

1. Thymine, Uracil         - Pyrimidines

2. Uracil, Cytosine         - Pyrimidines

3. Guanine, Adenine      - Purines

4. Adenine, Thymine     - Purines

Subtopic:  Double Helix : Watson & Crick Part 1 | Double Helix : Watson & Crick |
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


A competive inhibitor of succinic dehydrogenase is

1. malonate                 

2. oxaloacetate

3. α-ketoglutarate       

4. malate

Subtopic:  Enzymae Inhibition: Introduction | Enzyme Inhibition |
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


An organic substance bound to an enzyme and essential for its activity is called:

1. coenzyme                   

2. holoenzyme

3. apoenzyme                 

4. isoenzyme

Subtopic:  Enzyme Cofactors |
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


The enzyme amylase belongs to the class

1. hydrolase                       

2. isomerase

3. transferase                     

4. lyases

Subtopic:  Enzymes Classification |
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


Cobalt is present in the molecule of

1. vitamin B6

2. vitamin B12

3. vitamin B2

4. vitamin B1

To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


NAD, NADH and NADP are

1. not a participant in any catalytic reaction

2. participants as cofactors in non-catalytic reaction

3. participants as cofactor in enzyme catalysed reactions

4. participants as cofactor in both non-catalytic and enzyme catalysed reactions.

Subtopic:  Enzyme Cofactors |
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


DNA has deoxyribose as the constituent sugar. The position where the sugar lacks oxygen is

1. 1

2. 2

3. 3

4. 4

Subtopic:  Carbohydrates: Introduction | Carbohydrates: Glycosidic Bond & Disaccharide |
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


The linkage that joins two adjacent nucleotides in RNA is

1. phosphate ester                 

2. phosphodiester

3. phosphate anhydride         

4. N-glycoside

Subtopic:  Double Helix : Watson & Crick Part 1 | Double Helix : Watson & Crick |
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


Phosphodiester bond is present in

1. ATP

2. ADP

3. cAMP

4. none of these

Subtopic:  Double Helix : Watson & Crick Part 1 | Double Helix : Watson & Crick |
To view explanation, please enrol in the course below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level: