Which of the following is incorrect?

(a) The hair protein, keratin, is synthesized from the amino acid methionine

(b) Phospholipids act as carriers of small non polar molecules across the cell membrane

(c) Dietary intake of PUFA decreases the serum cholesterol level in our body

(d) Cobalt is a constituent of Vit B12

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Which of the following vitamins is a coenzyme for amino acid and fatty acid metabolism?

(a) Vitamin B6                (b) Vitamin B12

(c) Vitamin B1                (d) Vitamin B2

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The inhibition of succinic dehydrogenase by malonate is an example of

(a) competitive inhibition

(b) non-competitive inhibition

(c) allosteric modulation

(d) none of the above

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


In RNA thymine is replaced by

(a) uracil                           (b) adenine

(c) thiamine                       (d) guanine

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


An example of the competitive inhibition of an enzyme is the inhibition of:

(a) succinic dehydrogenase by malonic acid

(b) cytochrome oxidase by cyanide

(c) hexokinase by glucose -6-phosphate

(d) carbonic anhydrase by carbondioxide

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


In which one of the following sets of three items each belong to the category mentioned against them?

(a) Lysine, glycine, thiamine - amino acids

(b) Myosin, oxytocin and gastrin -hormones

(c) Rennin, helicase and hyaluronidase - enzymes

(d) Optic nerve, oculomotor, vagus - sensory nerves

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The figure given below shows three velocity substrate concentration curves for an enzyme reaction. What do the curves a, b,  and c depict respectively?

(a) a - normal enzyme reaction

     b - competitive inhibition

     c - non-competitive inhibition

(b) a - enzyme with an allosteric modulator added

     b - normal enzyme activity

     c - competitive inhibition

(c) a - enzyme with an allosteric stimulator

     b - competitive inhibition added

     c - normal enzyme reaction

(d) a - normal enzyme reaction

     b - non-competitive inhibitor added

     c - allosteric inhibitor added

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Which of the following contain β-1, 4 linkage?

(a) Maltose

(b) Sucrose

(c) Lactose

(d) Fructose

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Which statement is true?

(a) Adenine has 4 nitrogen atoms

(b) Cytosine has 3 nitrogen atoms

(c) Guanosine has 3 nitrogen atoms

(d) Uracil has 5 nitrogen atoms

Please attempt this question first.

Difficulty Level:


Enzymes, vitamins and hormones can be classified into a single category of biological chemicals because of all of these

(a) enhance oxidative metabolism

(b) are conjugated proteins

(c) arc exclusively synthesised in the body of a living organism as at present

(d) help in regulating metabolism.

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level: