Biochemistry Answers

b) Write the structures of the following compounds:
i) N-ethyl-N-methylmethanamide
ii) 4-Nitro-N-phenylethanamide

b) What are the factors that affect the immune response? Differentiate between the cellular and humoral immunity.

a) Discuss briefly the experiment of Griffith and Avery.

b) Explain the following terms.
i) Termination codons ii) Lac operon
iii) Chemical carcinogens iv) Immobilised enzyme.

a) What is the difference between the electron transport reactions of mitochondria and the
ones which take place in photosynthetic process?

b) Explain the role of uncouplers in electron transport chain or oxidative phosphorylation.
Illustrate your answer with the help of an example.

a) Explain the following terms:
(i) Constitutive and induced enzymes (ii) Metabolic regulation
(iii) Product inhibition

b) How is the conversion of fatty acid to acyl - CoA accomplished thermodynamically? Explain giving the reactions involved.

a) How is the enzyme pyruvate dehydrogenase complex different from other enzymes?
Explain how it functions in the conversion of pyruvate to acetyl- CoA?

b) Differentiate between the following with the help of examples in each case. i) Convergent and Divergent nature of catabolism and anabolism respectively ii) Homolactic and Alcoholic fermentation