An agent that inhibits the growth of bacteria without killing them is called a(n)
bacteriostatic agent
bactericide
sanitizer
antiseptic
The Correct Answer is A
A. Bacteriostatic agent: Bacteriostatic agents prevent bacterial multiplication so the host immune system can eliminate the organisms, without directly killing them.
B. Bactericide: A bactericidal agent kills bacteria rather than merely inhibiting their growth.
C. Sanitizer: A sanitizer reduces microbial numbers to safe levels but does not specifically denote whether it kills or only inhibits growth.
D. Antiseptic: Antiseptics are used on living tissue to reduce microbial load and can be either inhibitory or lethal depending on the agent and concentration.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. True: Reverse transcriptase synthesizes complementary DNA (cDNA) from an RNA template, a process used by retroviruses and in molecular biology applications such as cloning eukaryotic genes.
Correct Answer is A
Explanation
A. Consists of an apoenzyme plus a cofactor:
A holoenzyme is the complete, active enzyme composed of the protein portion (apoenzyme) together with its required nonprotein component (cofactor or prosthetic group); the holoenzyme is catalytically functional.
B. Is inactive:
The inactive form is typically the apoenzyme (enzyme protein without its cofactor); the holoenzyme denotes the active, fully assembled enzyme.
C. Is a non-protein component of an enzyme:
Non-protein components are cofactors or prosthetic groups; the holoenzyme includes both protein and non-protein parts, so it is not solely the non-protein component.
D. An enzyme without an active site:
An enzyme lacking an active site would be nonfunctional and is not the definition of a holoenzyme; holoenzymes contain the active site within the apoenzyme and are functional when combined with their cofactors.
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