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Biology > Cellular Respiration > Flashcards

Cellular Respiration Flashcards

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1
Q

The formula for aerobic cellular respiration is what ?

A

C6H12O6 + 6O2 —> 6H2O +6CO2

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2
Q

About how many reactions are required for cellular respiration to occur ?

A

20 reactions

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3
Q

Is the process overall exergonic or endergonic?

A

Exergonic

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4
Q

What controls the entire process of cellular respiration ?

A

Enzyme activity - it lowers the activation energy, therefore catalyzing every reaction.

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5
Q

What is stage 1 of the cellular respiration process ?

A

Glycolysis - a 10 step process occurring In the cytoplasm.

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6
Q

How many steps occur in glycolysis?

A

10 steps.

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7
Q

Where does glycolysis occur?

A

In the cytoplasm

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8
Q

What is stage 2 of cellular respiration ?

A

Pyruvate oxidation - a one step process occurring in the mitochondrial matrix?

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9
Q

How many steps are involved in pyruvate oxidation?

A

One step

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10
Q

Where does pyruvate oxidation occur ?

A

In the mitochondrial matrix.

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11
Q

What is stage 3 of cellular respiration ?

A

The Kreb’s cycle - an right step prices that occurs in the mitochondrial matrix.

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12
Q

How many steps occur during Kreb’s cycle ?

A

8 steps.

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13
Q

Where does Kreb’s cycle occur ?

A

In the mitochondrial matrix.

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14
Q

What is stage 4 of cellular respiration ?

A

The electron transport chain and chemiosmosis - a multistep process that occurs in the mitochondrial membrane.

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15
Q

Where does the ETC and chemiosmosis occur ?

A

In the mitochondrial membrane.

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16
Q

What is substrate level phosphorylation ?

A

A mechanism forming ATP directly in and enzyme catalyzed reaction.

17
Q

What is oxidative phosphorylation ?

A

A mechanism forming ATP indirectly through a series of enzymes catalyzed redox reactions involving oxygen as the final electron acceptor .

18
Q

Is more ATP formed by substrate level phosphorylation or by oxidative phosphorylation ?

A

Oxidative as it is more complex.

19
Q

Oxidative phosphorylation involves what reductions?

A

NAD+ —> NADH

FAD+ —> FADH2

20
Q

Where does NADH and FADH2 transfer most of their energy to ?

A

ATP molecules

21
Q

In glycolysis, how many ATP are produced ?

A

4 ATP

22
Q

In glycolysis, how many ATP are used ?

A

2 ATP

23
Q

What net ATP did glycolysis produce ?

A

2 ATP

24
Q

Describe the Kreb’s cycle:

A

A cycle series of reactions that transfers energy from organic molecules to ATP, NADH & FADH2 while also removing CO2.

25
Q

How many NADH are produced during glycolysis?

A

2 NADH

26
Q

For each glucose molecule, how many times does Kreb’s cycle have to turn ?

A

2 times ( 2 G3P molecules)

27
Q

When is energy harvested in Kreb’s cycle ?

A

In steps 3,4,5,6&8

28
Q

In what steps is NADH produces in Kreb’s cycle ?

A

Steps 3,4&8

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