Link Reaction and Krebs Cycle Flashcards

1
Q

What reaction makes acetate?

A

the oxidation of pyruvate

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2
Q

Where does the link reaction occur?

A

mitochondrial matrix

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3
Q

What are the products of the oxidation of pyruvate?

A

acetate and NADH and CO2

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4
Q

How many carbons are in acetate?

A

2

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5
Q

What does acetate form when it combines with coenzyme A?

A

acetylcoenzyme A

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6
Q

What is produced overall in the link reaction? (per glucose)

A

2 x Acetyl CoA
2 x NADH
2 x CO2

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7
Q

What is the job of coenzyme A?

A

to deliver the acetate so it can react with a 4-carbon compound

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8
Q

How many CO2s are produced from ONE cycle of the Krebs cycle?

A

2

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9
Q

How many molecules of ATP are produced in one round of the Krebs cycle?

A

1

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10
Q

Why are NADH and FADH needed?

A

needed to donate electrons to ETC in oxidative phosphorylation

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11
Q

How many reduced FAD are formed in ONE round of the Krebs cycle?

A

1

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12
Q

What are the products of the Krebs cycle PER GLUCOSE?

A

6 x NADH
2 x ATP
4 x CO2
2 x FADH

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13
Q

What is regenerated in the Krebs cycle?

A

the 4 carbon compound, oxoloacetate

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14
Q

What happens in the link reaction?

A
  • decarboxylation (forms CO2, NADH and acetate)
  • acetate combines with coenzyme A forming Acetyl-coA
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15
Q

Why does temperature impact the rate of respiration?

A
  • enzymes involved in respiration
  • rate of enzymes are impacted by temperature
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