In a messenger RNA the 3' UTR refers to the region of the mRNA that is
a. before the start codon.
b. before the site for initiation of transcription.
c. after the stop codon.
d. the coding region.
e. after the site for termination of transcription.
C
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Oxygen, carbon dioxide, as well as other small
molecules, cross the plasma membrane through the process(es) of
a. diffusion. b. osmosis. c. endocytosis and exocytosis. d. active transport. e. facilitated diffusion
A woman is considered to have reached menopause when ____
a. her menstrual cycles have diminished b. her follicles are depleted c. her follicles have regenerated d. her eggs are mature e. her eggs dissolve
Which of the following is a measure of the distending force across the lungs?
A) intra-alveolar pressure B) atmospheric pressure C) difference between intra-alveolar pressure and atmospheric pressure D) transpulmonary pressure E) intrapleural pressure
You are working with a strain of E. coli that has a mutation in the DNA polymerase II gene, such that the encoded protein is exonuclease deficient, but is otherwise normal. How do you predict that this would most likely affect the activity of this enzyme?
A. This mutation would prevent the ability of DNA polymerase II to remove RNA nucleotides in the 5' to 3' direction. B. This mutation would prevent the ability of DNA polymerase II to engage in lagging strand synthesis. C. This mutation would prevent the ability of DNA polymerase II to form phosphodiester bonds between nucleotides. D. This mutation would prevent the ability of DNA polymerase II to remove DNA nucleotides that are damaged.