Which statement about the cytoskeleton is correct?
It's for DNA synthesis
It aids in cell shape and transport
It's found only in the nucleus
It's made of nucleic acids
The Correct Answer is B
A. It's for DNA synthesis: DNA synthesis is performed by DNA polymerases and replication machinery, not the cytoskeleton.
B. It aids in cell shape and transport: The cytoskeleton (actin filaments, microtubules, intermediate filaments) maintains cell shape and supports intracellular transport and motility.
C. It's found only in the nucleus: The cytoskeleton extends throughout the cytoplasm and interacts with the plasma membrane and organelles, not confined to the nucleus.
D. It's made of nucleic acids: The cytoskeleton is primarily composed of protein polymers (e.g., actin, tubulin), not nucleic acids.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Ribosome: Ribosomes synthesize (translate) proteins from mRNA but do not package proteins for export.
B. Nucleolus: The nucleolus is the nuclear region where rRNA is transcribed and ribosomal subunits are assembled, not involved in packaging secreted proteins.
C. Golgi apparatus: The Golgi modifies, sorts, and packages proteins into vesicles for secretion or delivery to other cellular locations.
D. Centriole: Centrioles organize microtubules and play roles in cell division, not in protein packaging.
Correct Answer is B
Explanation
A. Muscle: Muscle tissue composes organs that generate force and movement, not the skin’s outermost layer.
B. Epithelial: The epidermis is made of stratified squamous epithelial cells and forms the skin’s outer layer.
C. Nervous: Nervous tissue (sensory nerve endings) is present in skin but is not the tissue that forms the outer surface.
D. Connective: The dermis is connective tissue beneath the epidermis and supports the outer layer, but it is not the outermost tissue.
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