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Question

Conversion of glucose 6-P requires ATP. Yet critically ill patients are given glucose solution intravenously instead of glucose 6-P. The reason for not giving glucose 6-P directly is

A
Glucose 6-P is degraded very fast in the blood before it enters the cells
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B
Commercial preparation of glucose 6-P is always contaminated with toxic chemicals
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C
High cost of glucosp 6-P
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D
Cells cannot take glucose 6-P
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Solution

The correct option is C Cells cannot take glucose 6-P
Glucose solution is given intravenously for an instant source of energy. Glucose-6-phosphate is formed after phosphorylation of glucose. It cannot enter the cell directly and hence, glucose--phosphate is not given intravenously. Glucose can easily enter the cell and then phosphorylated to generate energy.
So, the correct answer is 'Cells cannot take glucose 6-P'.

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