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 D
Explanation
A. Transduction: Transduction involves the transfer of bacterial DNA via bacteriophages and does not occur through reproduction.
B. Transformation: Transformation involves uptake of free DNA from the environment, not parental inheritance.
C. Horizontal gene transfer: Horizontal gene transfer involves genetic exchange between organisms that are not in a parent-offspring relationship.
D. Vertical gene transfer: Vertical gene transfer refers to genetic transmission from parent to offspring during reproduction.
Correct Answer is B
Explanation
A. It is a structural component of ribosomes: That describes rRNA rather than mRNA.
B. It carries genetic information from DNA for the purpose of synthesizing a polypeptide (protein): Messenger RNA conveys the coding sequence from DNA to the ribosome where it directs polypeptide assembly.
C. It contains an anticodon: Anticodons are features of tRNA that pair with mRNA codons; mRNA contains codons, not anticodons.
D. The ribose of its nucleotides is missing an oxygen: Missing an oxygen on the 2′ carbon describes deoxyribose in DNA nucleotides; RNA nucleotides (including mRNA) have ribose with the 2′ oxygen present.
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