cellular respiration Flashcards

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1
Q

cellular respiration formula

A

C6H12O6 + 6 O2 -> 6 CO2 + 6 H2O + energy

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2
Q

glucose is used in:

A

glycolysis

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3
Q

O2 is used in:

A

oxidative phosphorylation

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4
Q

CO2 is produced in:

A

the pre-Krebs and the Krebs cycle

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5
Q

H2O is produced in:

A

oxidative phosphorylation

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6
Q

ATP is produced in:

A

glycolysis, the Krebs cycle, and oxidative phosphorylation

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7
Q

ATP is used in:

A

glycolysis

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8
Q

ADP + Pi are used in:

A

glycolysis, the Krebs cycle, and oxidative phosphorylation

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9
Q

ADP + Pi are produced in:

A

glycolysis

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10
Q

NADH is produced in:

A

glycolysis and the Krebs cycle

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11
Q

NADH is used in:

A

oxidative phosphorylation

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12
Q

NAD+ is used in:

A

glycolysis and the Krebs cycle

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13
Q

NAD+ is produced in:

A

oxidative phosphorylation

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14
Q

how much ATP is produced in glycolysis

A

2

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15
Q

how much ATP is produced in the Krebs cycle

A

2

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16
Q

how much ATP is produced in oxidative phosphorylation

A

28 to 34

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17
Q

what’s the overall function of glycolysis

A

break glucose down into pyruvate, make NADH and 2 ATP

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18
Q

what’s the overall function of the Krebs cycle

A

oxidates pyruvate which makes carbon dioxide, makes 6 NADH, 2 FADH2, and 2 ATP

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19
Q

what’s the overall function of oxidative phosphorylation

A

oxidates NADH and FADH2, makes ATP and H2O

20
Q

why does cellular respiration stop after glycolysis when no oxygen is present

A

because the Krebs cycle needs NAD+ to turn pyruvate into acetyl CoA and this NAD+ is from oxidative phosphorylation which cannot occur without oxygen

21
Q

why do organisms ferment when it results in toxic waste products

A

they must ferment while in oxygen debt in order to regenerate NAD+

22
Q

why cant cells store large quantities of ATP

A

because it breaks down into ADP+Pi easily

23
Q

what is ATP stored as

A

proteins and fats

24
Q

what are the advantages of ATP being stored in a different form

A

its more stable and larger

25
Q

what ions effect the ability to make ATP

A

hydrogen

26
Q

is there less or more ATP when theres more H+ in the mitochondria

A

less ATP

27
Q

why is the rate of disappearance of O2 from a solution used to measure the rate of electron transport

A

because O2 is the final acceptor and without O2 electrons cannot move

28
Q

less calories means what

A

less glycolysis and Krebs cycle, meaning less use of NAD+ and therefore you’re left with more

29
Q

the three steps of cellular respiration are:

A

glycolysis, pyruvate oxidation and the citric acid cycle (pre-Krebs and Krebs cycle), and oxidative phosphorylation (electron transport and chemiosmosis)

30
Q

whats the difference between anaerobic and aerobic respiration

A

aerobic uses O2 while anaerobic does not

31
Q

where does glycolysis occur

A

cytoplasm

32
Q

what are the two major phases of glycolysis

A

energy investment phase and energy payoff phase

33
Q

does glycolysis require oxygen

A

no

34
Q

what happens in fermentation

A

pyruvate is converted to ethanol

35
Q

what are the two steps of fermentation

A

release CO2 from pyruvate, reduce the resulting acetaldehyde to ethanol

36
Q

what are the two main types of fermentation

A

alcohol and lactic acid

37
Q

what happens in lactic acid fermentation

A

pyruvate is reduced by NADH, forming lactate as an end product, does not release CO2

38
Q

what happens in the pre-Krebs cycle

A

CO2 is removed and NADH produced by these steps relay electrons from food to the ETC

39
Q

what happens in the citric acid cycle

A

the acetyl group if acetyl CoA combines with oxaloacetate, forming citrate

40
Q

what is ATP synthase

A

protein complex that hydrogen moves through to go across the membrane (mitochondrial matrix to intermembrane space), uses H+ to drive ATP’s phosphorylation

41
Q

what is chemiosmosis

A

use of energy in a hydrogen gradient to drive cellular work

42
Q

what happens in the electron transport chain (ETC)

A

electrons drop free energy as the go down the chain and are passed to O2, making H2O

43
Q

oxidation is when

A

something loses electrons

44
Q

reduction is when

A

something gains electrons

45
Q

early prokaryotes generated ATP through what

A

glycolysis because of the atmosphere’s low oxygen content