Confused about these please help 6. The co-enzyme S-CoA is used twice during this cycle. Why is this co-enzyme useful, and what is the result of using it in each of those twooccasions?7. The Krebs cycle is a circle. What do you think would happen if youremoved one of the compounds from that circle to make an amino acid(this does happen, Alpha-ketogluterate is the basic building block formany amino acids)? The cell has a variety of other pathways that canmake oxaloacetate (the final 4 carbon product in the krebs cycle) fromother molecules in the cell. Why might these alternative pathways beimportant?

Answered: 6. The co-enzyme S-CoA is used twice…

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter19: The Tricarboxylic Acid Cycle

Section: Chapter Questions

Problem 4P: Understanding the Mechanism of the -Ketoglutarate Dehydrogenase Reaction tshe first step of the...

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Confused about these please help

6. The co-enzyme S-CoA is used twice during this cycle. Why is this co-
enzyme useful, and what is the result of using it in each of those two
occasions?
7. The Krebs cycle is a circle. What do you think would happen if you
removed one of the compounds from that circle to make an amino acid
(this does happen, Alpha-ketogluterate is the basic building block for
many amino acids)? The cell has a variety of other pathways that can
make oxaloacetate (the final 4 carbon product in the krebs cycle) from
other molecules in the cell. Why might these alternative pathways be
important?

Expert Solution

Step 1

Krebs or citric acid cycle is the main source of energy for cells and an important part of aerobic respiration. The cycle harnesses the available chemical energy of acetyl coenzyme A (acetyl CoA) into the reducing power of nicotinamide adenine dinucleotide (NADH).

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