Exam 2: Krebs Cycle Flashcards

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1
Q

Step 1: What happens?

A

Acetyl is attached to oxaloacetate, forming citrate (6 carbons)

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2
Q

Step 2: What happens?

A

Citrate re-arranges to isocitrate (6 carbons)

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3
Q

Step 3: What happens?

A

Isocitrate is oxidized to α-ketoglutarate. CO2 released, NADH formed (5 carbons)

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4
Q

Step 4: What happens?

A

α-ketoglutarate is oxidized…combines with CoA to form succinyl CoA…CO2 released NADH formed (4 carbons)

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5
Q

Step 5: What happens?

A

Succinyl CoA breaks down to CoA and succinate (4 carbons). Since this is exergonic, this drives formation of GTP from GDP and P. GTP can transfer phosphate to make ATP.

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6
Q

Step 6: What happens?

A

Succinate is oxidized into fumarate (4 carbons). FADH2 is formed.

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7
Q

Step 7: What happens?

A

Fumarate and water make malate (4 carbons)

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8
Q

Step 8: What happens?

A

Malate is oxidized into oxaloacetate (4 carbons). NADH is made.

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9
Q

Where does the Krebs cycle occur?

A

Matrix of mitochondria

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10
Q

In which steps are NADH produced from the reduction of NAD+ in TCAC?

A

Steps 3, 4, and 8

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11
Q

In which steps are CO2 formed in TCAC?

A

Steps 3 and 4

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12
Q

In which steps are FADH2 produced from the reduction of FAD?

A

Step 6

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13
Q

Final products from 1 glucose (2 TCAC)?

A

2 FADH2, 6 NADH, 4 CO2, 2 ATP

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14
Q

How many times does the cycle occur?

A

Twice

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15
Q

What is the acronym to rememeber the 8 compounds?

A

Can I Keep Selling Sex for Money Officer?

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