Cellular respiration

Question 1

Humans do cellular respiration and photosynthesis

Answer 1

False. Plants do both

Question 2

What are the four steps in cellular respiration?

Answer 2

Glycolisis (cytoplasm), Pyruvate oxidation (mitochondrial matrix), Krebs cycle (mitochondrila matrix), Oxidative Phosphorilation (inner mitochondrial membrane)

Question 3

How many types of cellular respiration are there?

Answer 3

Aerobic cellular respiration (uses oxygen) and anaerobic cellular respiration (doesn’t use oxygen), also called fermentation

Question 4

What is the main role of Aerobic Cellular Respiration?

Answer 4

To generate ATP from glucose and oxygen

Question 5

Glycolisis only occurs with oxygen

Answer 5

False

Question 6

What are the products of glycolisis?

Answer 6

2 pyruvate, 2 ATP, and 2 NADH

Question 7

What are the reactants of glycolisis?

Answer 7

Glucose

Question 8

In the second step of the aerobic cellular respiration, whos is being oxidized and who is being reduced?

Answer 8

Pyruvate is being oxidized, while NAD is being reduced.

Question 9

Where is the first molecule of CO2 produced during glycolisis?

Answer 9

Pyruvate oxidation

Question 10

What enzyme attaches itself to the oxidized pyruvate and what is its function?

Answer 10

Coenzyme A attached itself to the molecule and targets it for use in the Krebs cycle.

Question 11

What are the reactants of Pyruvate oxidation?

Answer 11

2 pyruvates

Question 12

What are the products of Pyruvate oxidation?

Answer 12

2 CO2, 2 NADH, 2 AcetylCoA

Question 13

What are the 3 different parts of Krebs cycle?

Answer 13

Initiation, Oxidation, Regeneration

Question 14

What is the initiation molecule for the Krebs Cycle?

Answer 14

Oxaloacetate

Question 15

Which molecules are reduced during the regeneration phase?

Answer 15

NAD and FAD

Question 16

What are the reactants of Krebs cycle?

Answer 16

2 Acetyls

Question 17

What are the products of Krebs cycle?

Answer 17

4 CO2, 6NADH, 2 FADH, 2 ATP

Question 18

What are the structures responsible for transporting the electron provided by NADH?

Answer 18

Complex I, Complex III, and Complex IV.

Question 19

What molecule is the final electron acceptor during Oxidative Phosphorilation?

Answer 19

Oxygen

Question 20

How many molecules of ATP are created from one piece of glucose?

Answer 20

38

Question 21

What is the direction of proton movement during oxidative phosphorillation?

Answer 21

Across the inner mitochondrial membrane, from the matrix into the intermembrane space, and then again from the intermembrane space into the matrix through ATP synthase, leading to generation of ATP

Question 22

What are the reactants seen in Oxidative Phosphorylation?

Answer 22

NADH, FADH, Oxygen

Question 23

What is the product of Oxidative phosphorylation?

Answer 23

ATP (most of the ATP produced during glycolisis)

Question 24

What happens if oxygen becomes depleted during Oxidative Phosphorylation?

Answer 24

NADH and FADH build up, depletion of NAD and FAD

Question 25

Explain the lactic acid fermentation cycle

Answer 25

Pyruvate is reduced to lactic acid, creating NAD

Question 26

Explain the ethanol fermentation cycle

Answer 26

Pyruvate is oxidized into acetaldehyde, which is then reduced into ethanol

Question 27

What are the two processes of cellular respiration that can happen in an anaerobic environment?

Answer 27

Lactic acid fermentation and ethanol fermentation

Question 28

Which one of the following statements BEST represents the relationship between cellular respiration and photosynthesis?

Answer 28

Photosynthesis stores energy in carbohydrates, while respiration releases it

Question 29

During the citric acid (Krebs) cycle, the release of CO2 is the result of __________ reactions that are coupled to the ___________ of _____________

Answer 29

Oxidation; reduction; NAD+

Question 30

When you exhale, there is more CO2 than was present in the air that you inhaled. This CO2 comes from reactions in:

Answer 30

Pyruvate oxidation and Krebs cycle

Question 31

In the absence of oxygen, lactic acid fermentation:

Answer 31

Regenerates NAD from the reduction of pyruvate

Question 32

Where do aerobic and anaerobic respiration take place?

Answer 32

Aerobic respiration takes place in the mitochondria and anaerobic respiration takes place in the cytoplasm

Question 33

What is the production ATP of NADH and FADH?

Answer 33

1:3 and 1:2