Kreb's cycle Flashcards

1
Q

Mnemonic 1

A

Can I Keep Selling Substances For Money, Officer?

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2
Q

Mnemonic 2

A

So At Disco Devil Sipped Down Five Drinks

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3
Q

Where is CO2 produced?

A

Where loss of carbon atoms happens , so from
Isocitrate&raquo_space; a-ketoglutarate
a-keto&raquo_space; succynil co a

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4
Q

Where is NADH produced?

A

Where CO2 is lost and in the final step so,
Isocitrate&raquo_space; a-ketoglutarate
A-keto&raquo_space; succynil co a
malate&raquo_space; oxaloacetate

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5
Q

Where is FADH2 produced?

A

from Succinate&raquo_space; Fumarate

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6
Q

Where is GTP (ATP) produced?

A

From Succynil coA&raquo_space; Succinate

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7
Q

Steps of Krebs cycle

A
  1. Claisen condensation
    4+2 = 6
  2. Isomerization
  3. Oxidative decarboxylation yields NADH
  4. Oxidative decarboxylation yields NADH
  5. Substrate-level phopshorylation yields GTP
  6. Dehydrogenation yields FADH2
  7. Hydration
  8. Dehydrogenation yields NADH
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8
Q

What type of enzymes ?

A

All dehydrogenase except for the first and fifth which are syntheses and the second and penultimate which are aconitase and fumarate

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9
Q

What are the products of prep phase per one pyruvate?

A

NADH

CO2

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10
Q

What are the products of prep phase per 1 glucose (so 2 pyruvate)?

A

2 NADH

2CO2

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11
Q

What are the products of TCA per one pyruvate?

A

2 CO2
3 NADH
1 ATP
1FADH2

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12
Q

What are the products of TCA per 1 glucose (so 2 pyruvate)?

A

4 CO2
6 NADH
2 ATP
2 FADH2

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13
Q

What are products of prep. phase + TCA ?

A

8 NADH
6 CO2
2 ATP
2 FADH2

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14
Q

How many enzymes make the Pyruvate Dehydrogenase Complex?

A

3

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15
Q

How many coenzymes does PDH require?

A

5

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16
Q

How is Tea cycle regulated?

A

At irreversible steps (where you move carbons)

Activated by substrate availability(NAD+ and AMP) and inhibited by product accumulation (NADH and ATP)

17
Q

How is PDH regulated

A

By reversible phosphorylation of E1.

PDH kinase is activated by high ATP

18
Q

Where does TCA happen?

A

Matrix of mitochondria