31. The sugar which forms the major component of nucleic acids is

A. ribose
B. galactose
C. mannose
D. maltose

32. Under aerobic condition pyruvate is converted by pyruvate dehydrogenase to

A. phosphoenolpyruvate
B. acetyl CoA
C. lactate
D. glyceraldehyde 3 phosphate

33. Which of the following is not a disaccharide?

A. Amylose
B. Cellobiose
C. Lactose
D. None of these

34. Hexokinase activity in glycolysis is inhibited by

A. glucose 6- phosphate
B. fructose 6-phosphate
C. fructose 1,6 biphosphate
D. phosphofructokinase

35. The ultimate source of energy that sustains living systems is

A. glucose
B. oxygen
C. sunlight
D. carbon dioxide