Inhibition of succinate dehydrogenase by malonate is an example of:

1. Non-competitive inhibition

2. Competitive inhibition

3. Antagonism

4. Synergism

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

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 rate of enzyme action decreases at higher temperature [after a certain value] because the increased heat

Which of the following does not affect the activity of simple enzyme?

1. Temperature

2. Presence of coenzymes

3. pH

4. Substarate concentration

The following graphs show enzymatic activity for certain factors on x-axis and y-axis. Which of the following is correct in such regard?

1. Figure (1) ; x-axis - Potential energy , y-axis- Progress of reaction

2. Figure (2) ; x-axis - Enzymatic activity, y-axis- Temperature

3. Figure (3) ; x-axis- Velocity of reaction, y-axis-Substrate concentration

4. Figure (2) ; x-axis- pH, y-axis- Enzymatic activity                                                 

• Look at the graph given below. The reaction rate the reaction can be increased beyond point C by:

How many statements are false from given
information?
(a) Ribozymes are enzyme made up of protein.

(b) In every chemical reaction transition state
energy is always greater than activation energy.

(c) Co-factors are always proteinous in nature

(d) Enzyme inhibition can not be removed.

(e) Enzyme action can be stopped at low temp.

(f) Km value (Michaelis constant) is the specific
concentration of substrate molecule.

1. 2 

2. 3

3. 4 

4. 5