Which is the first step in analysis of biomolecules?

1

(a)

Precipitation

(b)

Extraction

(c)

Staining

(d)

Reagent Reaction

Primary metabolites are always found in animal cells. Which of the following is not an example of primary metabolite?

1

(a)

Amino acids

(b)

Sugar

(c)

Carbohydrate

(d)

Alkaloids

The fact that all biomolecules undergo turnover is known as _____.

1

(a)

Catabolism

(b)

Anabolism

(c)

Metabolism

(d)

All of the above

Which of the following defines the living state?

1

(a)

Non-equilbriurn steady state

(b)

Equilibrium steady state

(c)

Non-equilibrium non-steady state

(d)

Equilibrium non-steady state

Which of the following is not a macromolecule?

1

(a)

Protein

(b)

Polysachharide

(c)

Lipid

(d)

DNA

What is the term to ribonucleic acid with catalytic power?

1

(a)

Ribozymes

Mention four essential major elements of life.

1

(a)

Oxygen, carbon, hydrogen and nitrogen are the four basic essential elements of life.

Name of any two aromatic amino acids.

1

(a)

Tyrosine and tryptophan are the two aromatic amino acids.

The macromolecules that form the hereditary determinants of the living organism. Name it.

1

(a)

Nucleic acid.

Why does starch turn blue black with iodine?

1

(a)

Appearance of blue colour with the addition of iodine is due to its reaction with amylose of starch.

Oil does not dissolve in water.Give scientific explanation.

2

(a)

Give the basic representation\(\frac { dP }{ dt } \) of rate of a chemical reaction.Also define the same

2

(a)

Give any two examples of derived lipids.

2

(a)

Account for the following. Phospholipids form a thin layer on the surface of an aqueous medium.

2

(a)

Why is living state a non-equilibrium steady-state?

2

(a)

Draw the structure of the amino acid, alanine.

3

(a)

Explain the basic structure of a nucleotide.

3

(a)

Define living state.

3

(a)

Explain classification of enzymes.

3

(a)

(i) Identify the structure shown in figure.
(ii) Write the measurement (distance) of the parts marked (A), (B), (C).

(iii) How many H-bonds are there at the place marked as(6)?
(iv) Which form of DNA is shown in the figure?
(v) Whether B type DNA has left-handed spiral structure or right-handed?

3

(a)

Illustratea glycosidic, peptide and a phosphodiester bond.

5

(a)

What are factors which affect action of enzyme? What is lock and key model and induced fit model?

5

(a)

Describe the mechanism of enzymatic action.

5

(a)