Overview of respiration

Question 1

Define oxidative phosphorylation.

Answer 1

On the inner membranes of the mitochondria in aerobic respiration. Where the energy for making ATP comes from oxidation-reduction reactions and is released in the transfer of electrons down the ETC.

Question 2

Define photophosphorylation.

Answer 2

Occurs on the thylakoid membranes of chloroplasts, in the light dependent stage of photosynthesis. The energy for making ATP comes from light and is released in the transfer of electrons down the ETC.

Question 3

Define substrate level phosphorylation.

Answer 3

Occurs when phosphate groups are transferred from donor molecules eg GP to ADP to make ATP in the LIR of photosynthesis.

Question 4

What are the 3 groups of organisms recognised depending on their type of respiration?

Answer 4

Obligate aerobes
Facultive aerobes
Obligate anaerobes.

Question 5

Define an obligate aerobe.

Answer 5

Use aerobic respiration and break down substrates using oxygen, releasing a relatively large amount of energy.

Question 6

Define a facultive aerobe.

Answer 6

Eg yeast and many bacteria. Respite aerobically but can also respire without oxygen.

Question 7

Define obligate anaerobes.

Answer 7

Eg some species of bacteria and archaea. Respire anaerobically and cant grow in the presence of oxygen.