9. Please select which following enzyme contains ribozyme activity.
(A) RNase A
(B) RNase D
(C) RNase H
(D) RNase L
(E) RNase P

10. Please select which following sugar residue on the plasma membrane is critical for the infection and release of influenza virus. (A) Fucose (B) Glucose (C) GluNAc (D) Mannose (E) Sialic acid

11. For amino acids with neutral R groups, at any pH below the pl of the amino acid, the population of amino acids in solution will have: (A) a net negative charge. (B) a net positive charge. (C) no charged groups. (D) no net charge. (E) positive and negative charges in equal concentration.

12. An octapeptide composed of four repeating glycylalanyl units has: (A) one free amino group on an alanyl residue. (B) one free amino group on an alanyl residue and one free carboxyl group on a glycyl residue. (C) one free amino group on a glycyl residue and one free carboxyl group on an alanyl residue. (D) two free amino and two free carboxyl groups. (E) two free carboxyl groups, both on glycyl residues.

13. In a conjugated protein, a prosthetic group is: (A) a fibrous region of a globular protein. (B) a nonidentical subunit of a protein with many identical subunits. (C) a subunit of an oligomeric protein. (D) a part of the protein that is not composed of amino acids. (E) synonymous with "protomer"

14. When oxygen binds to a heme-containing protein, the two open coordination bonds of Fe2+ are occupied by: (A) one O atom and one amino acid atom. (B) one O2 molecule and one amino acid atom. (C) one O2 molecule and one heme atom. (D) two O atoms. (E) two O2 molecules.

15. The anaerobic conversion of 1 mol of glucose to 2 mol of lactate by fermentation is accompanied by a net gain of: (A) 2 mol of ATP and 2 mol of NADH (B) 2 mol of ATP (C) 1 mol of ATP and 1 mol of NADH (D) 2 mol of NADH (E) 1 mol of NADH

16. Which one of the following molecules in Glycolysis donates a phosphate group to ADP to produce ATP? (A) glucose-6-phosphate (B) phosphoenolpyruvate (C) fructose-6-phosphate (D) fructose-1,6-bisphosphate (E) glucose-1-phosphate

17. In what form does the product of glycolysis enter the TCA cycle? (A) Pyruvate (B) Glucose (C) NADH (D) Acetyl-CoA (E) Succinate

18. Which 3-carbon molecule is a final product of Glycolysis? (A) phosphoglyceraldehyde (B) pyruvate (C) 2-phosphoglycerate (D) 3-phosphoglycerate (E) Citrate

19. Which of the following has highest content of oleic acid (ω9, C18:1)? (A) soybean oil (B) lard (C) butter (D) olive oil (E) palm oil

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