Which of the following describes the given graph correctly?    

 

1. Endothermic reaction with energy A in presence of enzyme and B in absence of enzyme

2. Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme

3. Endothermic reaction with energy A in absence of enzyme and B in presence of enzyme

4. Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme

Which of the following is incorrect?

1. Enzymatic activity is maximum at its optimim p^H and temperature.

2. Enzymatic activity declines both below and above the optimum value.

3. Low temperatures destroys enzymatic activity

4. High temperatures destroys enzymatic activity

The competitive inhibitor of enzyme succinic dehydrogenase is

1. succinate

2. malonate

3. malate

4. mannose

k_m (Michaelis constant) value of enzyme is the substrate concentration at which velocity of reaction

1. V_max

2.  one fourth of V_max

3. One third of V_max

4. half of V_max

Which of the following class of enzyme is used for catalysing hydrolysis of ester, ether, peptide bonds?

1. Lyases

2. Ligases

3. Hydrolases

4. Both A and B

Which of the following class of enzyme catalyse removal of groups from substrates by mechanism other than hydrolysis leaving double bonds?

1. Lyases

2. Ligases

3. Isomerases

4. Hydrolases

Which of the following class of enzyme catalyse the linking together of 2 compounds?

1. Lyases

2. Ligases

3. Hydrolases

4. Transferases

Which of the following class of enzyme catalyse the joining of C-O and hydrolysis of C-N bonds respectively?

1. Lyases and Ligases

2. Ligases and Lyases

3. Ligases and Hydrolases

4. Lyases and Hydrolases

Which of the following class of enzymes helps in catalysing a transfer of a group (other than hydrogen) between a pair of substrates?

1. Ligases

2. Lyases

3. Transferases

4. Hydrolases

Electron transferring enzymes belongs to which class of enzymes

1. Transferases

2. Oxidoreductases

3. Isomerases

4. Lyases