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6 August, 23:30

Carbohydrate metabolic enzymes bind D-glucose specifically. D-glucose has an estimated caloric value of 1 k. cal per 4 grams of carbohydrate.

Based on the methods used to convert the energy of D-glucose into a useable form, what would you estimate the caloric value of L-glucose to be using the same method?

A) 1 k. cal per 4 grams

B) 1 k. cal per 2 grams

C) 1 k. cal per 8 grams

D) 0 k. cal per 4 grams

E) 2 k. cal per 8 grams

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Answers (1)
  1. 6 August, 23:48
    0
    D) 0 k. cal per 4 grams

    Explanation:

    Genarally, glucose can be classified into two enantiomers such as d-glucose and l-glucose. The d-glucose is the most common sugar that bodies of living organisms use as source of energy. However, l-glucose is an organic compound and it is one of the aldohexose monosaccharides. It is the l-isomer of glucose and commonly refer to as a low-calorie sweetener. The l-glucose is relatively indistinguishable in taste from d-glucose but cannot be used as a source of energy. Therefore, in the given problem:

    if d-glucose has an estimated caloric value of 1 k. cal per 4 grams of carbohydrate, then the caloric value of l-glucose will be 0 k. cal per 4 grams.
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