Topic7 Cullular Resporation

Question 1

Glycolysis

Answer 1

Takes place in cytoplasm

No oxygen needed

Is a chain of enzyme controlled steps where glucose is broken down into pyruvate

Question 2

1. Investment stage

Answer 2

2 ATP molecules used up per molecule of glucose

Phosphofructokinase

Question 3

2. Pay off phase

Answer 3

Energy pay off phase

4 molecules of ATP produced per molecule of glucose

Dehydrogenase releases ions from some of the compounds in this part of pathway

Ions picked up by carrier molecule NAD becomes NADH

Question 4

Citric acid cycle

Answer 4

If oxygen present, pyruvate broken down into carbon dioxide and an acetyl group

Carbon dioxide released

Coenzyme A joins the acetyl group with oxaloacetate to form citrate

Question 5

Dehydrogenase

Answer 5

Removes hydrogen ions and energy electrons

Question 6

Hydrogen ions and energy electrons

Answer 6

Passed to NAD or FAD forming NADH or FADH2

Carry them to the electron transport chain

Question 7

Electron transport chain

Answer 7

Most ATPA synthesised

Consists of proteins that are attached to the inner membrane of a mitrochondrion

NADH&FADH2 release energy electrons

Energy used to pump hydrogen ions across inner mitochondrial membrane

Oxygen is final electron acceptor

Question 8

Respiration substrates

Answer 8

Starch
Other sugar molecules
Proteins
Fats

Question 9

ATP

Answer 9

Used to transfer energy to synthetic pathways

Production regulated by feedback inhibition

Question 10

Phosphofructokinase inhibited

Answer 10

High levels of
ATP
Citrate

Question 11

Metabolic pathways of respiration

Answer 11

Central to metabolism

Question 12

3 processes of respiration

Answer 12

1. Glycolysis
2. Citric acid cycle
3. Electron transport chain