OBJECTIVE LIFE SCIENCE
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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70
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80
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90
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100
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Detailed explanation-1: -A single molecule of glucose stores more than 90 times the energy stored by ATP. ATP, though, transfers energy quickly and is used by the cell as an immediate source of energy.
Detailed explanation-2: -A single sugar molecule stores more than 90 times the chemical energy of an ATP molecule.
Detailed explanation-3: -The breakdown of one glucose molecule is enough to make around 38 molecules of ATP. So, clearly, glucose has a lot more stored energy than ATP does. However, cellular respiration is a multistep process that takes time and numerous enzymes.
Detailed explanation-4: -Thus, the second phase of glycolysis provides four molecules of ATP and two of NADH per molecule of glucose, paying the investment of the preparatory phase.
Detailed explanation-5: -In aerobic respiration, one glucose molecule results in a net ATP gain of 38 ATP.