DNA is primarily found in the cell:
Ribosome
Membrane
Nucleus
Cytoplasm
The Correct Answer is C
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Epithelial: Epithelial tissue is avascular -it lacks blood vessels and receives nutrients and oxygen by diffusion from underlying connective tissue.
B. Connective: Connective tissue is typically vascular (e.g., bone, adipose, loose connective) and contains blood vessels that supply cells.
C. Nervous: Nervous tissue is richly supplied with blood vessels to meet high metabolic demands of neurons and glia.
D. Muscle: Muscle tissue (skeletal, cardiac, smooth) is vascularized to deliver oxygen and nutrients required for contraction.
Correct Answer is D
Explanation
A. Mutation: A change in the DNA sequence of a gene, not the regulated process of cell death.
B. Cell migration: Movement of cells from one location to another during development or repair, not a form of programmed death.
C. Cell division: The process by which a cell replicates and splits (mitosis/cytokinesis), the opposite of cell elimination.
D. Programmed cell death: Apoptosis is an orderly, regulated process involving caspases, cell shrinkage, membrane blebbing, and DNA fragmentation that eliminates cells without provoking inflammation.
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