The function of the sodium-potassium pump is to actively move:a
sodium into the cell and potassium out of the cell
b. sodium out of the cell and potassium into the cell
c. sodium out of the cell and to block potassium movement
d. both sodium and potassium out of the cell
e. both sodium and potassium into the cell
b
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Rickets in children and bone softening in adults is
the result of a deficiency of what vitamin? a. A b. B c. C d. D e. E
In horses, there are four alleles at the A locus. Arranged in dominance sequence, they are A (wild), ab (bay), ac (brown), ad (black) ? If you bred several bay mares whose sires were brown to a brown stallion whose sire was black, what are the genotypes of the parents; what type of offspring would be produced; and in what proportion? ?
A. aaad x acad; 1/2 brown, 1/2 black B. abac x acad; 1/2 bay, 1/2 brown C. Aab x acad; 1/2 bay, 1/2 wild D. Aab x acad; all wild E. adab x acad; all black
Nondisjunction occurs when
A) a portion of a chromosome breaks off and is lost. B) two chromosomes fuse into one. C) members of a chromosome pair fail to separate. D) an entire pair of chromosomes is lost during meiosis I.
DNA polymerase III can synthesize a new strand of DNA at the rate of 300 nucleotides per minute
Indicate whether the statement is true or false