Select the correct statement 

1. The base pairs in DNA are stacked 0.34 nm apart
2. The diameter of a right handed helical ds B-DNA molecules is 34 $\stackrel{\mathrm{o}}{\mathrm{A}}$

3. Sugar-phosphate and hydrogen bonds are both present in a single nucleotide such as AMP

4. A and T of one strand compulsorily base pair with G and C respectively, of other strand is DNA

An example of protein with quaternary structure is 

1. Myoglobin

2. Hemoglobin

3. Keratin

4. All of these

Enzymes catalyse biochemical reactions by

1. Lowering the activation energy

2. Increasing the activation energy

3. Establishing stable bonds with substrate

4. Increasing temperature

Nucleotide is made up of

1. Heterocyclic compound, Monosaccharide,
Phosphoric acid.
2. Nitrogenous base, hexose sugar, phosphate.
3. Hetrocylic compound and pentose sugar only.
4. Hetrocyclic compound and nucleoside.

A list of different metabolites is given below in this list find out the number of primary & secondary metabolites, respectively & chooses the correct option:
Alkaloids, Abrin, Ricin, Carotenoids, Amino acids,
Glucose, Fructose, Fatty acids, Thymine, Uracil,
Lectins, Drugs.

1. Five and Six
2. Six and Six
3. Seven and five
4. Four and Eight

Read the following statement (A-D) :-

(a) Each protein is a polymer of amino acids.

(b) A protein is a hetero polymer and not a
homopolymer.

(c) Dietary proteins are the source of essential
amino acid.

(d) Collagen is the most abundant protein in
whole of the biosphere.
How many of the above statement are right ?

1. Three
2. One
3. Two
4. Four

Similarity between Inulin, Lecithin and Insulin is -
1. All are polymeric compound.
2. All are natural polypeptides.
3. All contains C,H,O and N.
4. None of these.

The most abundant chemical in living organisms is -
1. Water.
2. Protein.
3. Carbohydrate.
4. Nucleic acid.

Select the option which is incorrect for enzyme catalase.

1. The cofactor present is inorganic and proteinaceous in nature

2. Haem is the prosthetic group required by the enzyme

3. The cofactor required for optimal activity must be tightly bound to the apoenzyme

4. It catalyses breakdown of hydrogen peroxide to water and oxygen

How many statements are false from given
information?
(a) Ribozymes are enzyme made up of protein.

(b) In every chemical reaction transition state
energy is always greater than activation energy.

(c) Co-factors are always proteinous in nature

(d) Enzyme inhibition can not be removed.

(e) Enzyme action can be stopped at low temp.

(f) Km value (Michaelis constant) is the specific
concentration of substrate molecule.

1. 2 

2. 3

3. 4 

4. 5