FOOD CHEMISTRY
CARBOHYDRATES PROTEINS AND LIPIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Glucose is absorbed through protein channels in the plasma membrane of epithelium cells in the small intestine. Which characteristics of glucose prevent its diffusion through the phospholipid bilayer?
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it is non-polar and therefore hydrophobic
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its hydrogen bonds link with amino acids in the protein channel
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it is polar and therefore hydrophilic
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its covalent bonds interact with the phospholipids
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Explanation:
Detailed explanation-1: -Glucose is absorbed through protein channels in the plasma membrane of epithelium cells in the small intestine. Which characteristics of glucose prevent its diffusion through the phospholipid bilayer? It is non-polar and therefore hydrophobic.
Detailed explanation-2: -For glucose Since glucose is a large molecule, its diffusion across a membrane is difficult. Hence, it diffuses across membranes through facilitated diffusion, down the concentration gradient. The carrier protein at the membrane binds to the glucose and alters its shape such that it can easily to be transported.
Detailed explanation-3: -The GLUTs transport glucose across the plasma membrane by means of a facilitated diffusion mechanism.
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