Cellular Respiration

Question 1

Purpose of cellular respiration

Answer 1

To release energy from glucose.

Question 2

Glycolysis

Answer 2

First stage of cellular respiration and occurs within the cytosol of the cell. Results in net 2 atp (4 are made, 2 are used).

Question 3

Glycolysis inputs and outputs

Answer 3

Inputs: glucose, 2 adp + Pi, 2 nad+
Outputs: pyruvate, 2 atp, 2 nach

Question 4

Mitochondria

Answer 4

Site of cellular respiration.

Question 5

Origin of mitochondria

Answer 5

Endosymbiosis theory. Mitochondria resulting from the endosymbiosis between prokaryotic and eukaryotic cells.

Question 6

Evidence of mitochondria origin as endosymbiosis

Answer 6

Mitochondria has:

• ribosomes (similar to bacterial ribosomes)
• DNA (circular like bacteria)
• mitochondria reproduces by binary fission, independently of the cell.

Question 7

Krebs cycle

Answer 7

Occurs in mitochondrial matrix. Second stage of aerobic respiration in which pyruvate is broken down into carbon dioxide. 2 atp.

Question 8

Electron transport chain

Answer 8

Occurs in the cristae of the mitochondria and yields 32-34 atp. Oxygen accepts the hydrogen ions that are used to generate large amount of energy.

Question 9

Krebs cycle inputs and outputs

Answer 9

Inputs: acetyl coa, nad, fad, adp + Pi
Outputs: carbon dioxide, 2 atp, nadhh, fadh2

Question 10

Electron transport chain inputs and outputs

Answer 10

Inputs: nadh, fadh2, adp + Pi
Outputs: 32-34 atp, nad+, fad

Question 11

Fermentation

Answer 11

Animals: lactic acid, 2 atp
Yeast: ethanol, carbon dioxide, 2 atp

Question 12

Factors affecting the rate of cellular respiration

Answer 12

Temperature, glucose availability, oxygen concentration.