Lecture 22/23 Glycolysis & ETC Flashcards

1
Q

Who discovered the Krebs cycle?

A

Sir Hans Krebs

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2
Q

The Krebs Cycle

A

the oxidation of Acetyl-CoA to produce some ATP and the reduced coenzymes NADH and FADH2

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3
Q

Bridge Step

A

pyruvic acid (from glycolyssi) is oxidized and decarboxylated

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4
Q

Products of the bridge step

A

NADH, CO2, and Acetyl CoA

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5
Q

Products of the krebs cycle

A

8 NADH, 2 FADH2, 2 ATP

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6
Q

1 NADH =

A

3 ATPs

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7
Q

1 FADHs =

A

2 ATPs

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8
Q

Electron Transport Chain

A

NADH and FADH2 transfer their electrons through a series of carrier molecules

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9
Q

Where does the ETC happen?

A

in the cell membrane of bacteria

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10
Q

Can prokaryotes only use oxygen as the final electron accpetor?

A

No!

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11
Q

Heme

A

iron-containing group that can alternate between Fe2+ and Fe3+

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12
Q

The two parts of the ETC

A

electron transport and chemiosmosis

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13
Q

What does electron transport involve?

A

electrons are transferred to a terminal electron acceptor via electron carriers with concurrent proton translocationW

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14
Q

What does chemiosmosis involve?

A

general term for the use of ion gradients to generate ATP, uses potential energy of an electrochemical gradient to phosphorylate ADP to ATP

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15
Q

Enzyme involved in the ETC

A

ATP synthase

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16
Q

Total conversion to ATP for one glucose molecule

A

38

17
Q

Aerobic respiration

A

the final electron acceptor in the electron transport chain in molecular oxygen

18
Q

Anaerobic respiration

A

the final electron acceptor in the electron transport chain is not O2

19
Q

Which type of respiration yields less energy?

A

anaerobic (without O2)

20
Q

Why does ATP yield differ based on the environment?

A

the microbe doesn’t want to waste energy making proteins in a low O2 environment