Study the given statements -

i. A dehydration reaction (or condensation reaction) is the process in which water molecules are produced as a polymer is formed from monomers.

ii. The four main categories of macromolecules present in living systems are proteins, nucleic acids, carbohydrates, and lipids.

iii. Glucose is the main monosaccharide used by human cells for energy.

iv. The building blocks or monomers of nucleic acid molecules are called nucleosides.
How many statements are correct-?

1. i

2. ii

3. iii

4. iv

The steps in catalytic cycle of an enzyme action are given in random order

I. The enzyme releases the products. Now enzyme is free to bind another substrate

II. The active sites, now in close proximity of substrate break the bond of substrate and E – P complex forms

III. Binding of substrate induces the enzyme to alter its shape fitting more tightly around the substrate

IV. The substrate binds to the active site of enzyme (i.e., fitting into the active site.
The correct order is

1. I, II, III, IV

2. IV, III, II, I

3. I, III, II, IV

4. I, II, IV, III

Which one of the following biomolecules is correctly characterized?

1. Lecithin – a phosphorylated glyceride found in cell membrane

2. Palmitic acid – an unsaturated fatty acid with 18 carbon atoms

3. Adenylic acid – adenosine with a glucose and phosphate molecule

4. Alanine amino acid – contains an amino group and an acidic group anywhere in the molecule

Which of the following is not a secondary metabolite?

1. Antibiotics

2. Vitamins

3. Carotenoids

4. Morphine

Which of the following elements is present in higher proportion [% weight of the total] in Earth's crust with respect to the average composition of a human body?

1. Carbon

2. Nitrogen

3. Sulfur

4. Magnesium

A glycosidic bond connects:

The K_m value of an enzyme denotes the substrate concentration at which the enzyme catalyzed reaction:

1.  Reaches V_max

2.  Shows decline in the rate of reaction

3.  Attains ½ V_max

4.  Finally stops

The “primary structure” of a protein refers to:

1. coiling due to hydrogen bonding between amino acids

2. the alpha helix or pleated sheets

3. the side groups of the amino acids

4. the number and sequence of amino acids

C’ represents carbon of

1.sugar of nucleotides

2.Nitrogenous bases of nucleotides

3.Both 1 and 2

4.None of the above

In proteins, amino acids are linked by  a type of

1.Acetyl bond

2.Amide bond

3.Ester bond

4.Glycosidic bond