Which organelle packages proteins for export?
Ribosome
Nucleolus
Golgi apparatus
Centriole
The Correct Answer is C
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Blood: Blood is normally sterile in healthy individuals; presence of microbes (bacteremia) indicates infection.
B. Skin: The skin is heavily colonized by a diverse microbiome on its surface.
C. Mouth: The oral cavity hosts a rich microbial community in health.
D. Gut: The gastrointestinal tract contains a dense and diverse microbiome.
Correct Answer is C
Explanation
A. Reactant: Water can act as a reactant in certain reactions (e.g., hydrolysis), but that role is different from dissolving substances.
B. Buffer: While water influences pH, it does not act as a buffer that resists pH change on its own.
C. Solvent: Water dissolves many ionic and polar compounds due to its polarity, making it the universal solvent for biological systems.
D. Nutrient: Water is an essential nutrient for life, but the property asked about (dissolving substances) defines it as a solvent.
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