Which of the following does not cross the cell membrane
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- Glucose-6-phosphate
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- Glucose
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- Nitrous oxide
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- Carbon monoxide
0 voters
ANS:
Glucose-6-phosphate
“Glucose-6-phosphate cannot diffuse out of muscle cells”. —Pankaj Naik
- Glucose-6-phosphate cannot diffuse out of the cell as such. First, it has to be converted to glucose by glucose-6-phosphatase which then diffuse out of the cells. This occurs in liver. Thus, glucose can be used by other tissues.
Muscle cells does not contain glucose-6-phosphatase, glucose-6-phosphate cannot be converted to glucose and glucose-6-phosphate can only by utilized as a source of energy by only muscle itself.