Instructions

Which of the following is NOT a reason why carbon is the most important element in building up of biomolecules

a) Possession of various functional group

b) carbon can form bonds with hydrogen, oxygen and nitrogen atoms

c)carbon can link with other atoms with very strong triple bonds

d) carbon can form bonds with 1 to 4 atoms

11. During tumor growth, which of the following does not happen

a) Induction of hypoxia inducible factor

b) Increase in the levels of glycolytic enzymes

c) Increase in the consumption of glucose

d) Decrease in blood capillary appearing on the tumor

12. Why is the TCA cycle central pathway of metabolism of the cell?

a) It occurs in the center of the cell

b) Its intermediates are commonly used by other metabolic reaction

c) All other metabolic pathways depend upon it

d) None of the above

13. Which of the following signaling pathways does not involve a nucleotide?

a) G protein-coupled receptor

b) Second messenger generated by adenylyl cyclase

c) Receptor tyrosine kinase

d) None of the above

14. The synthesis of heme requires:

a) An amino acid and a product from the citric acid cycle

b) An amino acid and a product from the urea cycle

c) A fatty acid and a product from the urea cycle

d) None of the above

15. Which of the follow descriptions about Kd is correct for binding of O2 to the T or R state of hemoglobin?

a) Kd of T state > Kd of R state

a) Kd of T state < Kd of R state

a) Kd of T state = Kd of R state

d) A and B could both be correct

16.Which of the following modifications is normally not present in proteins?

a) Polysaccharide conjugation

b) Lipid conjugation

c) Polyadenylation

d) Phosphorylation

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