Scientists use tissue cultures to study possible medicines that can be used to treat cancer patients. what is one benefit of this procedure? a) patients do not receive harmful or ineffective medication. b) the cultured cells are not in their normal environment. c) doctors know how to treat all types of cancer. d) one tissue culture can be used for all cancer patients.

The answer is A. When a potent drug is discovered, it has to undergo animal and human trials to test it ADMET (Absorption, Distribution Metabolism, Excretion, and Toxicity) properties. Using tissue cultures to test drugs, such as cancer drugs, prevents the incidence of subjecting humans to the unknown adverse effects of the drugs before the drugs are determined to be safe for use.

the answer is b.) hydrogen bonds between bases.