Which of the following secondary metabolites is a polymeric substance?

1. Ricin

2. Monoterpenes

3. Curcumin

4. Rubber

Which of the following is the most abundant element present in human body?

1. Carbon

2. Hydrogen

3. Oxygen

4. Nitrogen

Which of following is a secondary metabolits as well as a drug?

1. Concanavalin A

2. Vinblastine

3. Diterpenes

4. Ricin

Chitin present in the exoskeletons of arthropods is

1. Protein

2. Polysaccharide

3. Lipid

4. Derived monosaccharide

The 3' - 5' phosphodiester linkages inside polynudeotide chain serve to join

All enzymes are proteins except

1. Trypsin

2. Pepsin

3. Steapsin

4. Ribozyme and Ribonuclease-P

Study the reaction given below

${\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}\stackrel{\mathrm{Enzyme}}{\rightleftarrows }{\mathrm{H}}_2{\mathrm{CO}}_3$

In absence of any enzyme this reaction is very slow, with 200 molecules of H2CO3 formed in one hour. In presence of an enzyme the reaction speeds up dramatically with about 600,000 molecules formed every second. Name the enzyme which has accelerated up the reaction by 10 million times.

1. Ribozyme

2. Carbonic anhydrase

3. Catalase

4. Peroxidase

Which of the following set of coenzymes are nucleotides of vitamin niacin ?

1. NAD, NADP

2. FMN, FAD

3. ATP, ADP

4. ATP, FAD

Which of the following factor(s) do(es) not affect enzyme activity?

A. Temperature

B. pH

C. Enzyme concentration

D.Product concentration

E. Substrate concentration

F. Activation energy

1. C only

2. C & D

3. D only

4. F only

Which of the following is present in acid insoluble fraction?

1. Glucose

2. Fructose

3. Alanine

4. Lipid