Aerobic Respiration

Question 1

Q: Where does glycolysis occur in the cell?

Answer 1

A: Cytoplasm

Question 2

Q: What is the starting material for glycolysis?

Answer 2

A: Glucose

Question 3

Q: What is the net gain of ATP from glycolysis?

Answer 3

A: 2 ATP

Question 4

Q: How many pyruvate molecules are produced at the end of glycolysis?

Answer 4

A: 2 pyruvate molecules

Question 5

Q: Is glycolysis an aerobic or anaerobic process?

Answer 5

A: Anaerobic

Question 6

Q: In glycolysis, NAD+ is reduced to which molecule?

Answer 6

A: NADH

Question 7

Q: What does fermentation regenerate that is required for glycolysis to continue?

Answer 7

A: NAD+

Question 8

Q: What are the products of lactate fermentation?

Answer 8

A: Lactate and NAD+

Question 9

Q: What are the products of alcoholic fermentation?

Answer 9

A: Ethanol and CO2

Question 10

Q: What process occurs after glycolysis if oxygen is present?

Answer 10

A: Aerobic respiration

Question 11

Q: Where does pyruvate enter when it is transported into the mitochondria for further processing?

Answer 11

A: Mitochondrial matrix

Question 12

Q: What type of transport does pyruvate use to enter the mitochondrial matrix?

Answer 12

A: Active transport via a H+−Pyruvate cotransporter

Question 13

Q: What is produced during the decarboxylation of pyruvate?

Answer 13

A: Acetyl-CoA, NADH, and CO2

Question 14

Q: What cycle does acetyl-CoA enter for further processing?

Answer 14

A: Citric Acid Cycle (Krebs Cycle)

Question 15

Q: How many NADH molecules are produced per turn of the Krebs cycle?

Answer 15

A: 3 NADH molecules

Question 16

Q: Where does the Krebs cycle take place in the cell?

Answer 16

A: Mitochondrial matrix

Question 17

Q: Is oxygen required for the Krebs cycle?

Answer 17

A: Yes

Question 18

Q: How many ATP molecules are produced per turn of the Krebs cycle?

Answer 18

A: 1 ATP molecule (per acetyl-CoA)

Question 19

Q: How many CO2 molecules are released per turn of the Krebs cycle?

Answer 19

A: 2 CO2 molecules

Question 20

Q: What is the final electron acceptor in the electron transport chain?

Answer 20

A: Oxygen

Question 21

Q: Where does the electron transport chain (ETC) take place?

Answer 21

A: Inner mitochondrial membrane

Question 22

Q: What does the electron transport chain (ETC) produce as a byproduct when oxygen combines with electrons and protons?

Answer 22

A: Water (H2O)

Question 23

Q: What is the function of the proton gradient created by the ETC?

Answer 23

A: It drives ATP synthesis via ATP synthase

Question 24

Q: How many ATPs are generated from one NADH molecule in the electron transport chain?

Answer 24

A: Approximately 3 ATP molecules

Question 25

Q: How many ATPs are generated from one FADH2 molecule in the electron transport chain?

Answer 25

A: Approximately 2 ATP molecules

Question 26

Q: What process uses the energy from the proton gradient to produce ATP?

Answer 26

A: Chemiosmosis

Question 27

Q: What is the maximum number of ATPs generated from one molecule of glucose after complete aerobic respiration?

Answer 27

A: Approximately 38 ATP molecules

Question 28

Q: In the electron transport chain, which complex does NADH donate electrons to?

Answer 28

A: Complex I

Question 28

Q: In the electron transport chain, which complex does FADH2 donate electrons to?

Answer 28

A: Complex II

Question 29

Q: What is the role of ATP synthase in aerobic respiration?

Answer 29

A: It synthesizes ATP using energy from the proton gradient.

Question 30

Q: What molecule enters the Krebs cycle after being converted from pyruvate?

Answer 30

A: Acetyl-CoA

Question 31

Q: The process by which intermediates can enter the Krebs cycle at any point is called a __________ cycle.

Answer 31

A: Metabolic cycle

Question 32

Q: What is the main purpose of the Krebs cycle?

Answer 32

A: To produce high-energy electron carriers (NADH and FADH2) and generate ATP.

Question 33

Q: What is the total number of NADH molecules produced from one glucose molecule in glycolysis, the Krebs cycle, and the electron transport chain?

Answer 33

A: 10 NADH molecules

Question 34

Q: The final product of aerobic respiration, after oxygen accepts electrons, is __________.

Answer 34

A: Water (H2O)

Question 35

Starting material of Acetyl-CoA Production?

Answer 35

2 pyruvate

Question 36

Products of Acetyl CoA Production

Answer 36

-2 NADH - 2 CO2 -2 Acetyl-CoA

Question 37

Acetyl-CoA is a ______ in the citric acid cycle

Answer 37

reactant

Question 38

There is no starting or ending point to a _______ cycle

Answer 38

metabolic

Question 39

Starting material in krebs cycle?

Answer 39

2 Acetyl-CoA

Question 40

Products of Krebs Cycle

Answer 40

-6 NADH -2 FADH2 -4CO2

Question 41

Krebs cycle takes place in?

Answer 41

mitochondria

Question 42

Is oxygen required in krebs cycle?

Answer 42

yes

Question 43

The chain of components enables extensive _____- production

Answer 43

ATP

Question 44

Starting Material for Electron Transport Chain (ETC)

Answer 44

-10 NADH (maximum) -2 FADH2

Question 45

Products of ETC

Answer 45

- each NADh --> ~3 ATP -each FADH2 ---> ~2 ATP -Total 34 ATP

Question 46

ETC takes place in?

Answer 46

mitochondria

Question 47

Is oxygen required for ETC?

Answer 47

yes