The sequence of nitrogen-containing bases on one strand of DNA could determine all of the following EXCEPT the sequence of
A) nitrogen-containing bases in mRNA.
B) nitrogen-containing bases in the other DNA strand.
C) ribose and phosphate molecules in tRNA.
D) amino acids in a protein molecule.
C
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Once glucose has entered a cell, what prevents it from diffusing back out of the cell?
a. Glucose pumps actively transported any leaked glucose back into the cell. b. One side of the cell membrane is permeable to glucose, but the other side is not. c. Glucose inhibitors attach to glucose once it’s in the cell. d. Glucose is phosphorylated, preventing it from leaving the cell. e. Glucose is hydrolyzed into two three-carbon molecules that cannot diffuse in a reverse direction.
If genetic studies reveal that a population has genetic sequences in common with two closely related species but has no unique sequences of its own, then
A) all three should be assigned to the same species. B) it should be considered a hybrid of the two species. C) it should be assigned separate species status. D) all three should be considered subspecies within the same species. E) it should be assigned to the species with which it shares more sequences.
When biologists use the terms fitness or fittest they are talking about __________.
a. how long an individual lives b. passing genes on to the next generation c. how healthy an individual is d. how strong an individual is