The total number of ATP formed by cellular respiration from one glucose molecule is
2
6
28
30
The Correct Answer is D
A. 2: Two ATP molecules are produced directly during glycolysis, but this represents only a small portion of the total ATP generated from one glucose molecule.
B. 6: Six ATP molecules are produced during the Krebs cycle per glucose molecule, but this does not account for the full yield from glycolysis, Krebs cycle, and oxidative phosphorylation combined.
C. 28: Approximately 28 ATP molecules are produced through oxidative phosphorylation and the electron transport chain, but when combined with the 2 ATP from glycolysis, the total ATP yield is higher.
D. 30: Complete cellular respiration of one glucose molecule, including glycolysis, the Krebs cycle, and oxidative phosphorylation, yields roughly 30 ATP in eukaryotic cells, representing the total energy harvested from one molecule of glucose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. corneum:The stratum corneum is the outermost layer of the epidermis composed of fully keratinized, dead cells. These cells provide protection but are incapable of undergoing mitosis.
B. lucidum:The stratum lucidum is a clear layer found only in thick skin, such as the palms and soles. It consists of dead keratinocytes that have lost their nuclei, so mitosis does not occur here.
C. granulosum:The stratum granulosum contains keratinocytes that are beginning to die and fill with keratohyalin granules. Mitosis does not take place in this layer, as cells are transitioning to terminal differentiation.
D. basale:The stratum basale is the deepest layer of the epidermis where keratinocyte stem cells actively divide. Continuous mitosis in this layer replenishes the epidermis and pushes new cells toward the surface.
E. spinosum:The stratum spinosum provides strength and flexibility with its desmosomal attachments. While cells here may appear metabolically active, true mitotic activity primarily occurs in the stratum basale below it.
Correct Answer is B
Explanation
False:Cellular respiration is a catabolic reaction because it breaks down glucose into carbon dioxide and water while releasing ATP. The breakdown of molecules to generate usable energy is characteristic of catabolic processes, not anabolic ones.
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