Phospholipids consist of a 3-carbon core to which fatty acids and a phosphate group are linked. The most common 3-carbon core is

a. dihydroxyacetone.
b. glyceraldehyde.
c. glycerol.
d. serine.


Ans: c. glycerol.

Biology & Microbiology

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The main class of neurotransmitters involved in regulating mood in vertebrate animals is/are

A. the biogenic amines. B. acetylcholine. C. amino acids. D. gases such as nitric oxide and carbon monoxide. E. acetylcholine and amino acids.

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Which region(s) of the ribosome accept(s) charged tRNA molecules during the elongation phase of translation?

a. the A site b. the A site or the E site c. the P site d. the P site or the E site e. the E site

Biology & Microbiology

__________ secrete hormones into blood. Fill in the blank(s) with the appropriate word(s)

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__________ such as reptiles control core temperature mainly by behavior.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology