U3A2: 6A aerobic cellular respiration

Question 1

purpose of cellular respiration

Answer 1

allows cells to break down large molecules and produce large amounts of ATP. it is vital to all living organisms and occurs via two distinct biochemical pathways (aerobic respiration and anaerobic fermentation)

Question 2

location of cellular respiration

Answer 2

mitochondria

Question 3

mitochondrial matrix

Answer 3

space inside the inner membrane of mitochondria

Question 4

cristae

Answer 4

peaks and ridges that the inner membrane of mitochondria fold into.

Question 5

stages of aerobic cellular respiration

Answer 5

• glycolysis
• the krebs cycle
• electron transport chain

Question 6

location of glycolysis

Answer 6

cytosol

Question 7

inputs of glycolysis

Answer 7

2 ADP + 2Pi, 2 NAD + 2H, 1 glucose

Question 8

outputs of glycolysis

Answer 8

2 ATP, 2 NADH, 2 pyruvate

Question 9

explain the process of glycolysis

Answer 9

• glucose (1 six-carbon molecule) is broken down via enzyme-regulated recations to form 2 pyruvate molecules (2 three-carbon molecules)
• as glucose is broken into pyruvate, energy is released, powering the loading of 2 ATP and 2 NADH.
• the 2 pyruvate molecules are transported to the mitochondria.

Question 10

location of the krebs cycle

Answer 10

mitochondrial matrix

Question 11

inputs of the krebs cycle

Answer 11

2 ADP + 2Pi, 6 NAD + 6H, 2 FAD + 4H, 2 Acetyl-CoA

Question 12

outputs of the krebs cycle

Answer 12

2 ATP, 6 NADH, 2 FADH₂, 4 carbon dioxide

Question 13

explain the process of the krebs cycle