Which of the following organelles is responsible for energy production?
Smooth ER
Mitochondria
Golgi apparatus
Ribosome
The Correct Answer is B
A. Smooth ER: Involved in lipid synthesis, detoxification, and calcium storage in some cells, not the primary ATP generator.
B. Mitochondria: Organelles that perform oxidative phosphorylation and produce most of the cell’s ATP (energy).
C. Golgi apparatus: Modifies, sorts, and packages proteins and lipids for secretion or delivery to organelles, not energy production.
D. Ribosome: Sites of protein synthesis (translate mRNA), not the main source of cellular energy.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. An isotonic solution: Has the same solute concentration as the cell interior, so water movement is balanced and the cell size remains unchanged.
B. Hypotonic solution: Has lower solute concentration outside the cell, so water enters the cell, causing swelling or lysis.
C. Hydrostatic solution: Refers to fluid pressure exerted by a liquid, not osmotic balance related to cell size.
D. Hypertonic solution: Has higher solute concentration outside the cell, so water leaves the cell, causing shrinkage (crenation).
Correct Answer is A
Explanation
A. Meiosis: The specialized cell division that halves chromosome number to produce gametes (ova and sperm).
B. Interphase: The stage of the cell cycle when the cell grows and DNA is replicated; it is not the division process that creates gametes.
C. Mitosis: Somatic cell division producing genetically identical daughter cells, not the reductional division that forms gametes.
D. Regeneration: Refers to tissue repair or regrowth, not the meiotic process that generates eggs or sperm.
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