Researchers testing new drugs usually give the drug to one group of people and give placebos, "sugar pills," to another group. The group receiving the placebo ________
A) is the control group
B) constitutes the experimental group
C) is needed so that the test will be repeated enough times
D) is a backup in case some of the people getting the drug drop out of the test
Answer: A
Biology & Microbiology
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A(n) ________ carries a specific amino acid to a ribosome, where the amino acid bonds to another.
A) mtDNA B) rRNA C) mRNA D) tRNA
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HIV cannot be transmitted sexually
a. true b. false
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contains hydrolytic enzymes
A. lysosome B. vacuole C. mitochondrion D. Golgi apparatus E. peroxisome
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