Which group produces a toxin somewhat similar to that produced by Shigella dysenteriae?
A. enterotoxigenic
B. enteroinvasive
C. enteropathogenic
D. enterohemorrhagic
E. All of the choices are correct.
D
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The notion of orthogenesis is no longer supported because we now know that evolution proceeds as an ongoing
process of dynamic adjustment, not toward any fixed goal.
a. True b. False
Which enzyme links nucleotides into a new stand of DNA?
a. DNA ligase b. DNA mutase c. DNA polymerase d. DNA primer e. DNA replicase
DNA replication occurs
a. between the gap phases of interphase. b. immediately before prophase of mitosis. c. during prophase of mitosis. d. during prophase of meiosis. e. at any time during cell division
“Genetic fingerprinting” is based on unique
a. nucleotide base pairing b. types of nucleotides c. differences in tandem repeats. d. ratios of purines to pyrimidines e. bonding patterns between nucleotides