37. The host range of a virus is determined by(A) the proteins on its surface and that of the host(B
39. What are prions?(A) misfolded versions of normal brain protein(B) tiny molecules of RNA that inf
40. What is the name given to viruses that are single-stranded RNA that acts as a template for DNA s
42. Bacteria containing recombinant plasmids are often identified by which process?(A) examining the
43. A gene that contains introns can be made shorter (but remain functional) for genetic engineering
44. The first cell whose entire genome was sequenced was which of the following?(A) H. influenzae in
45. Which of the following is a representation of gene density?(A) Humans have 2,900 Mb per genome(B
46. Why might the cricket genome have 11 times as many base pairs than that of Drosophila melanogast
47. Several of the different globin genes are expressed in humans, but at different times in develop
49. Of the following anatomical structures, which is homologous to the wing of a bird?(A) Dorsal fin
50. Each of the following has a better chance of influencing gene frequencies in small populations t
52. The scientific discipline concerned with naming organisms is called(A) taxonomy(B) cladistics(C)
54. What is the primary ecological role of prokaryotes?(A) parasitizing eukaryotes, thus causing dis
55. Which group includes members that are important primary producers in ocean food webs, causes red
56. Which of the following is a secondary compound of embryophytes?(A) adenosine triphosphate(B) alk
58. A terrestrial mollusc without a shell belongs to which class?(A) chitons(B) bivalves(C) gastropo