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.
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Related Questions
Correct Answer is B
Explanation
A. skeletal MT:Skeletal muscle tissue is under voluntary control and is not found in the walls of the uterus. It is primarily responsible for movements of the skeleton rather than involuntary contractions needed for labor.
B. smooth MT:Smooth muscle tissue makes up the bulk of the uterine wall (myometrium) and is responsible for powerful, rhythmic contractions during labor. These contractions are involuntary and essential for expelling the fetus.
C. stratified squamous ET:Stratified squamous epithelium is a protective tissue commonly found in areas exposed to friction, such as the skin and vaginal canal. It does not contribute to the contractile activity of the uterus.
D. elastic cartilage CT:Elastic cartilage provides flexibility and support in structures like the ear and epiglottis. It has no role in uterine structure or the generation of contractions during labor.
Correct Answer is A
Explanation
A. intercalated discs:Intercalated discs connect cardiac muscle cells and contain desmosomes and gap junctions. Desmosomes provide mechanical strength to prevent cells from pulling apart during contractions, while gap junctions allow coordinated electrical signaling.
B. stroma:Stroma refers to the supportive connective tissue framework in organs. While it provides general support, it does not directly prevent cardiac muscle cells from separating during contraction.
C. myofilaments:Myofilaments, including actin and myosin, generate the contractile force in muscle cells. They are essential for contraction but do not provide structural adhesion between cells.
D. flana:Flana is not a recognized anatomical or histological structure in cardiac tissue, so it has no role in maintaining the cohesion of heart muscle cells.
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