27. Which description of eicosapentaenoic acid , is correct?
(A) An omega-3 fatty acid
(B) An omega-5 fatty acid
(C) A saturated fatty acid
(D) None of above

23. What is a “cDNA library”? (A) A collection of peptide fragments derived from the genomic DNA in an organism or cell type under a defined set of conditions. (B) A collection of complementary DNA fragments derived from the complement of tRNA expressed in a particular organism or cell type under a defined set of conditions. (C) A collection of cloned DNA fragments derived from the complement of mRNA expressed in a particular organism or cell type under a defined set of conditions. (D) A collection of cloned RNA fragments derived from the complement strand of a particular DNA in an organism or cell type under a defined set of conditions.

24. In which organism can we find the “Restriction modification system”? (A) Bacteria (B) Viruses (C) Animals (D) All of above

25. How many fatty acid molecules does a triacylglycerol have? (A) 1 (B) 2 (C) 3 (D) None of above

26. Which description of omega-3 (ω-3) fatty acids is correct? (A) A double bond between C-2 and C-3 (relative to the ω carbon) (B) A double bond between C-3 and C-4 (relative to the ω carbon) (C) Two double bonds between C-2, C-3 and C-4 (relative to the ω carbon) (D) None of above

28. Which description of “lipase” is correct? (A) Catalyzing the hydrolysis of unsaturated fatty acids (B) Catalyzing the hydrolysis of triacylglycerol (C) Catalyzing the hydrolysis of saturated fatty acids (D) All of above

29. Which description of Sphingomyelins is   NOT   correct? (A) An amphipathic molecule (B) The polar region containing ester and amide is hydrophilic (C) The hydrocarbon tail is hydrophobic (D) None of above

30. By which cellular component are gangliosides degraded? (A) Endoplasmic reticulum (B) Peroxisome (C) Lysosome (D) None of above

31. Which phospholipase is responsible for the hydrolysis of Phosphatidylinositol 4,5-Bisphosphate (PIP2) to release inositol 1,4,5-Trisphosphate (IP3) and diacylglycerol (DAG)? (A) Phospholipase A (B) Phospholipase B (C) Phospholipase C (D) None of above

複選題32. Which description of prostaglandins (PG) is correct? (A) PGE2 and other series 2 prostaglandins are synthesized from arachidonate. (B) Series 2 prostaglandins are derived from EPA. (C) Some PGs trigger dilation of the smooth muscle of the uterus during menstruation and labor. (D) None of above

33. Which description of “Tumor suppressor genes” is correct? (A) Encode proteins that normally restrain cell division. (B) Mutation in one or more of these genes can lead to tumor formation. (C) Rb and p53 are tumor repressor genes. (D) All of above