BotanyIn the process of aerobic respiration how many ATP molecules will be generated if 2 molecules of triose phosphate is used as a substrate?

In the process of aerobic respiration how many ATP molecules will be generated if 2 molecules of triose phosphate is used as a substrate?

  1. A

    17

  2. B

    34

  3. C

    38

  4. D

    40

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    Solution:

    If one molecule of triose phosphate is used as a respiratory substrate 

    Via glycolysis,

    2 ATP and 1 NADH will be produced

    Therefore, when 2 molecules of triose phosphate is used as a respiratory substrate 

    4ATP and 2NADH will be produced.

    If one molecule of triose phosphate is used as a respiratory substrate 

    Via link reaction,

    1 NADH will be produced

    Therefore, when 2 molecules of triose phosphate is used as a respiratory substrate 

    Via link reaction

    2 NADH will be produced

    If one molecule of triose phosphate is used as a respiratory substrate 

    Via kreb cycle,

    1 ATP, 1 FADH2 and 3 NADH will be produced

    Therefore, when 2 molecules of triose phosphate is used as a respiratory substrate 

    Via kreb cycle,

    2 ATP, 2 FADH2 and 6 NADH will be produced

    1 NADH= 3 ATP

    1 FADH2= 2ATP.

    Total number of ATP produced during aerobic respiration when 2 molecules of triose phosphate is used as a respiratory substrate is

    4+ (2x3) + (3x2) + 2+ (2x2) + (6x 3) = 40 ATP

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