If a researcher used Escherichia coli DNA polymerase instead of Thermus aquaticus DNA polymerase in the PCR procedure, what would be the result?
A. DNA replication would occur more slowly than normal.
B. DNA replication would not occur at all.
C. Many mistakes would occur.
D. DNA replication would occur twice as fast as normal.
E. DNA replication would stop after one cycle.
Answer: E
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An example of a plesiomorphy in the earliest fossil birds would include ________
A) three clawed fingers on each hand B) a long, bony tail C) teeth D) down-like feathers E) All of the above.
Can energy be harvested by the cells from glucose without oxygen?
A) Yes, about as much as with oxygen. B) Yes, but not quite as much as with oxygen. C) Yes, but much less than with oxygen. D) No, oxygen is required to harvest any energy from glucose.
Which of the following statements best describes the termination of transcription in prokaryotes?
A) RNA polymerase transcribes through the polyadenylation signal, causing proteins to associate with the transcript and cut it free from the polymerase. B) RNA polymerase transcribes through the terminator sequence, causing the polymerase to separate from the DNA and release the transcript. C) Once transcription has initiated, RNA polymerase transcribes until it reaches the end of the chromosome. D) RNA polymerase transcribes through a stop codon, causing the polymerase to stop advancing through the gene and release the mRNA.
Which mutation would have the greatest likelihood of being retained in the gene pool?
a) A point mutation in the exon of a gene b) A point mutation in a non-coding region of DNA c) A translocation event that swaps the arms of two chromosomes d) A missense mutation that prematurely shortens the length of a translated peptide