An organic nutrient that cannot be synthesized by the organism and must be provided is called a(n)
element.
macronutrient.
compound.
growth factor.
trace element.
The Correct Answer is D
A. Element:
An element refers to a pure chemical substance such as carbon or nitrogen, not a complex organic molecule required for growth.
B. Macronutrient:
Macronutrients are required in large quantities but can often be synthesized or derived from other sources; the term does not imply inability to synthesize.
C. Compound:
This term is too broad and does not specify the nutrient’s essential nature or the organism’s inability to synthesize it.
D. Growth factor:
A growth factor is an organic compound, such as an amino acid, vitamin, or nucleotide base, that the organism must obtain externally because it cannot synthesize it.
E. Trace element:
Trace elements are inorganic minerals required in minute amounts for enzyme function, not organic nutrients that must be provided.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Antiseptic: Antiseptics are chemical agents suitable for application to living tissue to reduce microbial load on skin and mucous membranes before invasive procedures.
B. Disinfectant: Disinfectants are intended for inanimate surfaces and are often too harsh or toxic for direct use on patient skin.
C. Surfactant: Surfactants (detergents) help remove soils and some microbes but are not the primary agents used to achieve surgical skin antisepsis.
D. Antibiotic: Systemic or topical antibiotics treat or prevent infection but are not the standard topical agent used to prepare skin immediately before surgery.
Correct Answer is D
Explanation
A. DNA replication: DNA replication copies DNA from a DNA template and does not use RNA as the template for making DNA.
B. Transcription: Transcription is the synthesis of RNA from a DNA template, not the synthesis of DNA from RNA.
C. Translation: Translation converts mRNA codons into amino acids to build proteins; it does not produce DNA.
D. Reverse transcription: Reverse transcription uses an RNA template to synthesize complementary DNA (cDNA); retroviruses use reverse transcriptase to perform this process.
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