DNA:
is a single strand of nucleotides.
contains the sugar ribose.
is a double-helix strand of nucleotides.
transports amino acids during protein synthesis.
The Correct Answer is C
A. is a single strand of nucleotides: DNA is double-stranded. RNA is typically single-stranded.
B. contains the sugar ribose: DNA contains deoxyribose. Ribose is found in RNA.
C. is a double-helix strand of nucleotides: The molecular structure of DNA consists of two complementary strands that twist into a double-helix.
D. transports amino acids during protein synthesis: That is the specific function of transfer RNA (tRNA).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Forms glands: This is a core function of glandular epithelium (endocrine and exocrine).
B. Is important in communication and control: This is the primary characteristic of nervous tissue, not epithelial tissue.
C. Covers and protects body surfaces: This is the primary role of surface epithelium (like the skin).
D. Lines the interior of body cavities: This is the role of the endothelium and mesothelium, which are epithelial in nature.
Correct Answer is C
Explanation
A. usually involves the endocrine or nervous system: This describes extrinsic control, where signals come from outside the specific organ.
B. operates at the cellular level: While it involves cells, intrinsic control is specifically defined by an organ or tissue regulating itself.
C. is sometimes called autoregulation: Intrinsic control refers to "built-in" mechanisms within an organ that allow it to adjust its function without outside help (e.g., blood flow regulation within the heart).
D. operates at the system or organism level: This describes extrinsic or systemic regulation.
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