Calcium ion concentrations are tightly regulated because of the importance of calcium in biological functions
Calcium ion concentrations are ____ inside the cell than out.
a. slightly higher
b. slightly lower
c. the same
d. much higher
e. much lower
ANSWER: e
Biology & Microbiology
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The gradualistic model of speciation is supported by many transitional forms.
a. true b. false
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When there is no arabinose available in the environment, the AraC protein acts as a(n) ________ for the E. coli ara operon.
Fill in the blank(s) with the appropriate word(s).
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How many children can a healthy woman potentially bear during her reproductive window?
A. 5 B. 10 C. 15 D. 20 E. 25
Biology & Microbiology
The human body must maintain a constant pH. In the blood, bicarbonate serves as a(n) ________ to help maintain the necessary pH
A) acid B) buffer C) solvent D) base
Biology & Microbiology