Regarding transitions between stages of the cell cycle, scientists have
a. already discovered many of the proteins involved
b. figured out how the proteins communicate with each other
c. determined how the proteins operate as small nano-machines to perform their functions
d. shown that mammalian cells are easier to work with than Saccharomyces cerevisiae
e. no idea which proteins are needed
A
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Imagine that you compare two DNA sequences found in the same location on homologous chromosomes. On one of the homologs, the sequence is AACTACGA. On the other homolog, the sequence is AACTTCGA
Within a population, you discover that each of these sequences is common. These sequences _____. A) contain an SNP that may be useful for genetic mapping B) identify a protein-coding region of a gene C) cause disease D) protect against disease E) do none of the listed actions
Which is true about prokaryotic (bacterial) RNA polymerase?
A. It is used during transcription. B. It does not require a primer. C. It has a detachable subunit, sigma factor, which recognizes the promoter. D. It reads the template in the 3'-5' direction. E. All of the choices are true.
Which one of the following is most similar to the mechanism of an enzyme inhibitor?
A) keeping someone from parking by parking in their designated spot B) driving the wrong way on a one-way street C) forgetting to put a cap back on a pen D) changing the tires on a car
All of the genes shared by a population are its
A. gene frequency. B. gene pool. C. fitness. D. gene flow.