Respiration

Question 1

Where does glycolysis occur?

Answer 1

In the cytoplasm

Question 2

What occurs in glycolysis?

Answer 2

Phosphorylation of glucose
Splits to 2 molecules of TP
Oxidation of TP to form 2 molecules of pyruvate and 2 molecules of ATP

Question 3

What occurs in the link reaction?

Answer 3

Pyruvate is oxidised to acetate - forming reduced NAD

2-carbon acetate combines with coenzyme A to form acetylcoenzymeA

Question 4

What occurs in the krebs cycle?

Answer 4

AcetylcoenzymeA combined with a 4C molecule to form a 6C molecule
6C molecule loses CO2 and H to form ATP and a 4C molecule
4C molecule can now bind with acetylcoenzymeA again

Question 5

Where does oxidative phosphorylation occur?

Answer 5

In the mitochondria

Question 6

What occurs in oxidative phosphorylation?

Answer 6

Hydrogens reduce NAD AND FAD
electrons pass along electron transfer chain releasing energy
Energy is for active transport of protons across membrane
Protons diffuse into mitochondrial matrix through ATP synthase channels

Question 7

How does lipid respiration work?

Answer 7

Lipids hydrolysed to glycerol and fatty acids.
Glycerol is phosphorylated and converted to TP
Glycolysis occurs

Question 8

How does protein respiration occur?

Answer 8

Protein is hydrolysed to amino acids which enter the respiratory pathway

Question 9

Anaerobic respiration in plants and micro-organisms

Answer 9

Pyruvate + reduced NAD forms ethanol + co2 + oxidised NAD

Question 10

Process of anaerobic respiration in animals

Answer 10

Pyruvate takes up 2 hydrogen atoms from reduced NAD to form lactate