Question

36. The term used to describe the relationship between the two strands in a DNA double helix is:
A. opposite
B. an exact duplicate
C. colinear
D. complementary
E. antagonistic

37. The sequence of one strand of a DNA molecule is 5'-AGCGCT. What is the sequence of the other DNA strand?
A. 3'-AGCGCT
B. 3'-GCTGCA
C. 5'-TCGCGA
D. 5'-AGCGCT
E. none of the above

38. The elongation of the leading strand during DNA replication:
A. progresses away from the replication fork
B. occurs in the 3' --> 5' direction
C. produces many Okazaki fragments, which subsequently are joined together
D. depends primarily on the activity of DNA polymerase
E. does not require a template strand

39. Which statement about the genetic code is FALSE?
A. the genetic code is essentially identical in all living organisms
B. there are six codons for arginine (Arg)
C. amino acids are encoded by 64 different codons
D. several amino acids are encoded by more than one codon
E. the start codon is usually AUG, the only codon for methionine

40. Approximately what fraction of the human genome corresponds to coding regions of genes (exons)?
A. 100%
B. 48%
C. 19%
D. 1.5%
E. 0.1%