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

20. In which part of an animal cell can we find RNA? (A) Nucleus (B) Cytoplasm (C) Mitochondria (D) All of above

21. What does “SNP” mean? (A) A genomic base-pair change that helps distinguish one species from another (B) A type of genetic recombination that occurs only at specific sequences (C) A superfamily of N proteins (D) An RNA hybridization procedure

22. What is a “Haplotype”? (A) A set of DNA variations that tend to be inherited together on a chromosome (B) A set of genotypes on homologous chromosome pairs in the population (C) A set of phenotypes on a chromosome in the population (D) A set of all DNA variations on both chromosomes

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.

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

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

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