Respiration

Question 1

Glycolosis

Answer 1

Glucose is phosphorylated to glucose phosphate using ATP.
This is unstable so split into 2 TP. Oxidised by NAD and produces 2ATP for each TP, producing pyruvate.

Question 2

Where does glycolosis occur?

Answer 2

Cytoplasm

Question 3

Link reaction

Answer 3

Pyruvate actively transported from the cytoplasm to the mitochondrial matrix.

NAD oxidises pyruvate into acetate and decarboxylates it.
Acetate combines with coenzyme A to produce acetyl coenzyme A.

Question 4

Krebs cycle

Answer 4

acetyl coenzyme A combines with a 4C molecule (oxaloacetate) to produce a 6C molecule. The 6C molecule is decarboxylated and oxidised with NAD to produce a 5C molecule. CO2 and NADH produced.
5C molecule further decarboxylated and oxidised by NAD to a 4C molecule, producing CO2 and NADH again. The 4C molecule is further oxidised by NAD and FAD to produce another 4C molecule oxaloacetate. This provides energy for the reaction of ADP +Pi goes to ATP.

Question 5

What are the NADH and FADH formed from the krebs cycle used for?

Answer 5

e- and H+ donors in oxidative phosphorylation.

Question 6

Products from the Krebs cycle and link reaction

Answer 6

8x NADH
2x FADH
2x ATP
6x CO2

Question 7

Products from Krebs cycle per glucose molecule

Answer 7

6x NADH
2x FADH
2x ATP
4x CO2

Question 8

Products from link reaction per glucose molecule

Answer 8

2x NADH
2x acetyl coenzyme A
2x CO2

Question 9

Products of glycolisis

Answer 9

2x pyruvate
net gain of 2 ATP
2x NADH

Question 10

What is phosphorylation

Answer 10

making something more reactive by adding a phosphate