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    Cellular Respiration

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    1) State the key products of the Kreb's Cycle and how many of each there are starting from 1 glucose molecule.
    2) Show how each stage of cellular respirtion contributes to the total of 38 ATP from 1 molecule of glucose.
    3) State the input and output molecules of glycolysis and how many of each there are.
    4) Explain how amino acids from proteins and fatty acids from lipids in our diet can also be used in cellular respiration.

    © BrainMass Inc. brainmass.com December 24, 2021, 10:25 pm ad1c9bdddf
    https://brainmass.com/biology/biological-chemistry/cellular-respiration-krebs-cycle-473636

    SOLUTION This solution is FREE courtesy of BrainMass!

    1. The key products of the Kreb cycle are CO2, NADH, and FADH2 ( H2O is also produced). Before 1 glucose molecule enters it goes through glycolysis and pyruvate dehydrogenase. A molecule of glucose is broken down into 2 pyruvate, and then 2 cycles of cellular respiration or TCA cycle take place. The result of each is 3 CO2 and biproducts NADH and FADH2. H2O is produced in the phase known as the electron transport chain.

    2. The processes of glycolysis, cellular respiration (also known as the TCA or Kreb cycle), and the electron transport chain result in 38 ATP per glucose molecule. Glycolysis requires two ATP and creates four ATP. The net gain is two ATP. Two more are produced in the Kreb cycle and the remaining -- 34 ATP -- are produced by the electron transport chain.

    3. One molecule of glucose and two ATP go into glycolysis and the output is 2 pyruvate and 2 ATP.

    4. Amino acids from protein and fatty acids from lipids are used in cellular respiration if they are broken down. These processes are NOT considered to be de novo. They can enter the Kreb cycle by being acetyl COA, succinyl COA, etc.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    © BrainMass Inc. brainmass.com December 24, 2021, 10:25 pm ad1c9bdddf>
    https://brainmass.com/biology/biological-chemistry/cellular-respiration-krebs-cycle-473636

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