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.

Which of the following is an example of branched
polymer?
1. Chitin.
2. Cellulose.
3. Amylose.
4. Glycogen

During catalytic cycle of an enzyme action the binding
of the __a__ induces the __b__ to alter its shape. Here
a and b is _________
1. Substrate, enzyme.
2. Enzyme, substrate.
3. Substrate, Substrate.
4. Enzyme, Enzyme

Long protein chain folded upon itself like a hollow woolen ball and gives us a 3-dimensional view of a protein belongs to
1. Primary structure
2. Secondary structure
3. Tertiary structure
4. Quaternary structure

In nucleic acid the bond between the phosphate and hydroxyl group of sugar is
1. Hydrogen bond
2. Glycosidic bond
3. Ester bond
4. Peptide bond