41. The phosphate inhibition in the clavine formation with Claviceps SD58, can be counteracted by the addition of

A. alanine
B. methionine
C. tryptophan
D. lysine

42. The major route for the incorporation of ammonia (NH₄⁺) into organic compounds is via

A. reduction of pyruvate or alpha-ketoglutarate by enzymes
B. atmospheric nitrogen fixation
C. oxidation of pyruvate
D. all of these

43. The specific enzyme/(s) of the glyoxylate cycle is/are

A. isocitrate lyase
B. malate synthase
C. both (a) and (b)
D. anaplerotic

44. If ΔG of a chemical reaction has a negative value, the reaction

A. releases energy
B. requires energy
C. both (a) and (b)
D. none of these

45. The catabolic reaction, pentose-phosphate exists in

A. prokaryotic cells
B. eukaryotic cells
C. prokaryotic and eukaryotic cells both
D. none of these