The adjoining graph shows change in conc. of substrate on enzyme activity. Identify A, B and C:

Select the option which is not correct with respect to enzyme action.

1. Substrate binds with enzyme as its active site

2. Addition of lot of succinate does not reverse the inhibition of succinic dehydogenase by malonate.

3. A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate

4. Malonate is a competitive inhibitor of succinic dehydrogenase

Given below is the graph showing the effect of substrate concentration on enzyme activity. In the presence of a competitive inhibitor, when the concentration of the substrate is progressively increased:

The inhibition of succinic dehydrogenase by malonate is an example of

1. competitive inhibition

2. non-competitive inhibition

3. allosteric modulation

4. none of the above

In competitive inhibition:

(1) Inhibitor resembles the substrate in molecular structure

(2) Competition between substrates and inhibitors to occupy active sites

(3) Binding the inhibitors to active sites declines the enzyme action

(4) All are correct

The competitive inhibitor of enzyme succinic dehydrogenase is

1. succinate

2. malonate

3. malate

4. mannose

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

1. NAD, NADP

2. FMN, FAD

3. ATP, ADP

4. ATP, FAD