In a recombinant DNA experiment, which enzyme is used to join together DNA fragments by forming phosphodiester bonds between nucleotides? Recall that this same enzyme joins together Okazaki fragments on the lagging strand during DNA replication
A) DNA primase
B) DNA polymerase
C) DNA helicase
D) DNA ligase
E) Reverse transcriptase
D
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With regard to understanding the evolution of cooperation, the principal prediction that can be made from the expression Br > C is that _____
A) natural selection will favor cooperation among close relatives B) cooperation evolves because it benefits all members of a species C) cooperation evolves because it enhances the species' fitness D) selection favors self-sacrifice in reproduction E) natural selection will favor cooperation among any individuals
Is it possible to be a "carrier" (phenotypically normal but capable of passing the allele to one's offspring) for cystic fibrosis?
a. Yes b. No
A predictable effect of genetic drift in a small population is an increase in
A. mutations. B. dominant alleles. C. recessive alleles. D. genetic variation. E. homozygosity.
Which of the following statements about the oriC region in E. coli is incorrect?
A) It is 245 base pairs in length. B) It is rich in AT base pairs. C) It includes three repeating sequences of 13 base pairs. D) It is directly recognized and bound by DNA helicase. E) It includes five repeating sequences of 9 base pairs.