3 - Cellular Respiration

Question 1

4 Metabolic stages of cellular respiration

Answer 1

1. Glycolysis
2. Pyruvate oxidation
3. Krebs Cycle
4. Electron Transport Chain

Question 2

– respiration without O2
– in cytosol
- splitting of sugar

Answer 2

Glycolysis

Question 3

Cellular respiration

Answer 3

• Step-by-step breakdown of high-energy glucose molecules to release energy
• occurs in stages controlled by enzyme

Question 4

– respiration using O2
– in mitochondria

Answer 4

Aerobic respiration

Question 5

• migration from cytosol to matrix

Answer 5

Grooming cycle

Question 6

Location where krebs cycle happens

Answer 6

Mitochondrial matrix

Question 7

Krebs cycle other name

Answer 7

Citric acid cyle

Question 8

Location where ETC happen

Answer 8

inner mitochonndrial membrane

Question 9

Energy Currency of Cells

Answer 9

ATP

Question 10

• ATP is constantly recycles in our cells
• A working muscle cell recycle all ATP molecules about once per Minute.

Answer 10

ATP-ADP cycle

Question 11

Different types of Cellular respiration

Answer 11

1. Aerobic respiration
2. Anaerobic respiration

Question 12

releases carbon dioxide and water as waste products.

Answer 12

Aerobic respiration

Question 13

What happens to glucose in anerobic respiration

Answer 13

incompletely broken down

Question 14

ATP product of glycolysis

Answer 14

2 atp for every one glucose

Question 15

2 phases of glycolysis

Answer 15

• energy investing
• energy generating/harvest

Question 16

• Glucose “priming”
• Get glucose ready to split

Answer 16

energy investing

Question 17

NADH and ATP production in glycolysis

Answer 17

Energy generating/harvesting

Question 18

Glycolysis produces:

Answer 18

4 atp and 2 NADH

Question 19

Glycolysis consumes:

Answer 19

2 ATP

Question 20

Glycolysis net:

Answer 20

2 ATP and 2 NADH

Question 21

First cells had no organelles

Answer 21

Prokaryotes

Question 22

Prokaryotes that evolve ____ are ____ of all modern life

Answer 22

• glycolysis
• ancestors

Question 23

2 types of anaerobic fermentation

Answer 23

1. Alcohol fermentation
2. Lactic acid fermentation

Question 24

Dead end process
- At approx 12% ethanol, kills yeast. Can’t reverse the reaction

Answer 24

Alcohol fermentation

Question 25

- Reversible process - Once O2 is available lactate is converted back to pyruvate by the liver

Answer 25

Lactic Acid Fermentation

Question 26

Pyruvate branching point

Answer 26

No oxygen=fermentation With oxygen=krebs cycle (mitochondria)

Question 27

Pyruvate enters mitochondria - produces Acetyl CoA

Answer 27

Oxidation of pyruvate

Question 28

Oxidation of Pyruvate equation

Answer 28

Pyruvate + NAD+ + CoA -> Acetyl CoA + NADH and CO2

Question 29

What happens to acetyl CoA after oxidation of pyruvate

Answer 29

- Enters the Kreb Cycle

Question 30

Aka Citric Acid Cycle, happens in mitochondria matrix

Answer 30

Krebs cycle

Question 31

Who introduced krebs cycle

Answer 31

Hans Krebs (1900-81)

Question 32

Products of krebs cycle

Answer 32

- 8 NADH - 2 ATP - 2 FADHs

Question 33

bacteria -> 3.5 billion years ago (___)

Answer 33

Glycolysis

Question 34

free O2 -> 2.7 billion years ago (___)

Answer 34

Photosynthesis

Question 35

- series of molecules built into mitochondrial membrane (along the cristae)

Answer 35

Electron Transport Chain

Question 36

How much ATP does ETC yield from 1 glucose?

Answer 36

- approx. 34 ATP

Question 37

what “pulls” the electrons down the ETC?

Answer 37

Oxidative phosphorylation

Question 38

The diffusion of ions across a membrane

Answer 38

Chemiosmosis

Question 39

What does chemiosmosis create?

Answer 39

Create ATP

Question 40

enzyme used during chemiosmosis

Answer 40

ATP synthase

Question 41

Proposed chemiosmotic hypothesis

Answer 41

Peter Mitchell