During which phase does DNA replication occur?
Anaphase
Mitosis
Cytokinesis
Interphase
The Correct Answer is D
A. Anaphase: Anaphase is a stage of mitosis when sister chromatids separate and move to opposite poles, not when DNA is replicated.
B. Mitosis: Mitosis is the process of nuclear division; DNA replication occurs before mitosis, not during it.
C. Cytokinesis: Cytokinesis is the division of the cytoplasm following mitosis and does not involve DNA replication.
D. Interphase: Interphase (specifically the S phase) is when DNA replication occurs prior to mitosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Ribosome: Ribosomes are the sites of protein synthesis and contain rRNA and proteins, not the cell’s main DNA.
B. Membrane: The cell membrane separates interior from exterior and contains proteins/lipids, but it does not house the cell’s genetic material.
C. Nucleus: In eukaryotic cells most DNA is organized into chromosomes within the nucleus.
D. Cytoplasm: The cytoplasm contains many components and, in prokaryotes, the nucleoid (DNA) is cytoplasmic; mitochondria in eukaryotes also contain small amounts of DNA.
Correct Answer is A
Explanation
A. Gut: The gastrointestinal tract—especially the colon—harbors the densest and most diverse microbial community in the body.
B. Lungs: The lungs have a low-biomass microbiome in health and far fewer microbes than the gut.
C. Kidneys: Kidneys are normally sterile in healthy individuals; detection of microbes usually indicates infection.
D. Skin: The skin supports a rich microbiome at its surface but overall microbial load is lower than that of the gut.
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