. A second messenger involved in regulating metabolism is ____

a. ATP
b. ADP
c. mRNA
d. cAMP
e. NADH


ANSWER: d

Biology & Microbiology

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People with albinism carry two copies of the dominant allele (AA) and cannot make a pigment called melanin

a. True b. False

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What is the most likely cause of a sampling error?

a. a malfunctioning calculator b. a poorly designed hypothesis c. very few individuals in the control group d. having both an experimental and a control group e. the researcher’s knowledge of which individuals were in the experimental group

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Organisms in all trophic levels may be consumed by decomposers.

Answer the following statement true (T) or false (F)

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An antibody consists of how many polypeptides?

A. Four B. Five C. Two D. Eight E. Six

Biology & Microbiology