6A Aerobic cellular respiration

Cellular respiration primarily involves the breakdown of:

• glucose

• ATP

• carbon dioxide

• oxygen

Label the following diagram to summarise the overall chemical equation for aerobic cellular respiration.

a

b

c

d

e

oxygen

glucose

carbon dioxide

energy (ATP)

water

Place the following stages of aerobic cellular respiration in the correct order.

• The Krebs cycle

• The electron transport chain

• Glycolysis

Label the following diagram of a mitochondrion.

a

b

c

d

e

matrix

outer membrane

cristae

inner membrane

intermembrane space

Match each stage of aerobic respiration to the location in which it occurs.

• Glycolysis

• Cytosol

• The electron transport chain

• Mitochondrial matrix

• The Krebs cycle

• Cristae of the mitochondria

Classify the following molecules as inputs or outputs of glycolysis.

Groups:

(a) Inputs

,

(b) Outputs

• 2 ATP

• 2 NAD⁺ + 2 H⁺

• 2 pyruvate

• 2 ADP + 2P_i

• 2 NADH

• 1 glucose (C₆H₁₂O₆)

Between glycolysis and the Krebs cycle, a reaction called​ ​ (a)   converts ​​ (b)   to ​ (c)   . ​ (d)   is also produced.

• the link reaction
• pyruvate
• acetyl-CoA
• Carbon dioxide
• the Calvin cycle
• glucose
• water

Classify the following molecules as inputs or outputs of the Krebs cycle.

Groups:

(a) Inputs

,

(b) Outputs

• 2 ADP + 2P_i

• 2 ATP

• 2 acetyl-CoA

• 2 FADH₂

• 4 carbon dioxide

• 2 FAD + 4 H⁺

• 6 NAD⁺ + 6 H⁺

• 6 NADH

The main purpose of glycolysis and the Krebs cycle is to produce what for use in the electron transport chain?

• Loaded high-energy electron and proton carriers

• ATP

• Carbon dioxide

• Pyruvate

Classify the following molecules as inputs or outputs of the electron transport chain.

Groups:

(a) Inputs

,

(b) Outputs

• 2 FAD + 4 H⁺

• 2 FADH₂

• 26 or 28 ATP

• 10 NADH

• 6 H₂O

• 10 NAD⁺ + 10 H⁺

• 6 oxygen (O₂) + 12 H⁺

• 26 or 28 ADP + 26 or 28 P_i