I. Small organic molecules
II. Difficult to remove without denaturing the enzyme
III. Haem is an example

The above characters are of which of the following co-factors of an enzyme?

1. Metal ions

2. Prosthetic groups

3. Co-enzymes

4. Apoenzymes

Inhibition of succinate dehydrogenase by malonate is an example of:

1. Non-competitive inhibition

2. Competitive inhibition

3. Antagonism

4. Synergism

Identify the given compound:

1. An amino acid

2. A purine base

3. Polysaccharide containing nitrogen

4. Prostaglandin

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

1. Reaches V_max

2. Shows a decline in the rate of reaction

3. Attains ½ V_max

4. Finally stops

NAD and NADP are consider as

1.  Apoenzyme and cofactor respectively.

2.  Coenzyme and co-factor respectively.

3.  Both as co-enzyme.

4.  Apoenzyme and holoenzyme respectively.

The following diagram shows the molecular structure of:

 1. A hexose sugar

 2. An aromatic amino acid

 3. A nitrogenous base found in RNA

 4. An important constituent of a DNA nucleotide.

The number of correct statements amongst the given statements is:

I. Amino acids are substitute methanes.

II. The R group in serine is hydroxyl-methyl.

III. Arachidonic acid has 20 carbon atoms including the carboxyl carbon.

IV. Glycerol is trihydroxypropane.

V. Lecithin is a phospholipid.

 1.  2     

 2.  3

 3.  4   

 4.  5

Which of the following is the simplest amino acid?

1. Alanine 

2. Asparagine

3. Glycine 

4. Tyrosine

The essential chemical components of many coenzymes are:
1. Nucleic acid
2. Carbohydrates
3. Vitamins
4. Proteins

Which one of the following structural formulae of two organic compounds are correctly identified along with its related function?