Ethanol fermenting microbes reduce ________ into ethanol
A) glucose
B) pyruvate
C) NADH
D) NAD+
E) lactate
B
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In the transport model shown below, what is the exchange rate of Na+ for K+?
a. They are traded evenly across the membrane.
b. Two Na+ are exchanged for every single K+.
c. Three Na+ are exchanged for each two K+.
d. This model is not transporting the ions at all.
In which population is the frequency of the allele for brown feathers highest?
A) Population A. B) Population B. C) Population C. D) They are all the same. E) It is impossible to tell from the information given.
Bacteria living in salt marshes are most likely which of the following?
A. acidophiles B. barophiles C. halotolerant D. thermophiles
A basal lamina ______________________
(a) is a thin layer of connective-tissue cells and matrix underlying an epithelium. (b) is a thin layer of extracellular matrix underlying an epithelium. (c) is attached to the apical surface of an epithelium. (d) separates epithelial cells from each other.