Respiration

Question 1

What’s the difference between anaerobic and aerobic respiration

Answer 1

Anaerobic- doesn’t need oxygen,less efficient,incomplete break down of glucose,fast
Aerobic- needs oxygen,more efficient, complete break down of glucose,slow

Question 2

What’s the order of the reactions in respiration

Answer 2

Glycolysis, link reaction, kerbs cycle, oxidative phosphorylation

Question 3

Where does glycolysis take place

Answer 3

Cytoplasm

Question 4

Where does the link reaction take place

Answer 4

Fluid matrix of the mitochondria

Question 5

Where does the kerbs cycle take place

Answer 5

Fluid matrix of the mitochondria

Question 6

Where does oxidative phosphorylation take place

Answer 6

Cristae of mitochondria

Question 7

What are the key facts of glycolysis

Answer 7

In cytoplasm, anaerobic, net yield 2ATP 2NADH, glucose is phosphorylated by adding ATP, TP is oxidised to form pyruvate, pyruvate is actively transported to mitochondria for link

Question 8

What are the key facts for the link reaction

Answer 8

Pyruvate is dehydrogenated and decarboxylated to form acetate, in mitochondria,

Question 9

What are the products of the link reaction

Answer 9

Per reaction: 1x co2, 1x NADH….per glucose: 2 x co2, 2 x NADH

Question 10

What are the key facts of the krebs cycle

Answer 10

Matrix of mitochondria, acetyl Co A joins 4 carbon compounds to form a 6 carbon compound, coenzyme recycled, dehydrogenation,substrate level phosphorylation,

Question 11

What are the products of the Krebs cycle

Answer 11

3 x NADH, 1 x ATP, 1 x FAD, 2 x CO2 per cycle

Question 12

What is substrate level phosphorylation

Answer 12

Creation of ATP without ATP synthase…phosphate is added to ADP from another molecule

Question 13

Describe oxidative phosphorylation

Answer 13

Electron and protons released from reduce co enzymes, electrons flow along electron transport chain,electrons release energy, ADP+Pi~ATP, oxygen is the final electron acceptor

Question 14

What is a respiration substrate

Answer 14

Any biological molecule that can be repaired to release energy, w,g carbohydrates, lipids, proteins

Question 15

Why do cells respire

Answer 15

Essential to life, ATP is needed for all metabolic reactions, minimum amount of ATP need to maintain metabolism, different t respiration substrates have different energy values, proteins only respire when there are no lipids or carbs