Respiration

Question 1

ATP is useful in many biological processes. explain why (4M)

Answer 1

releases energy in small amounts 
energy readily available 
adds phosphate lowers activation energy 
regenerated 
immediate source of energy

Question 2

describe how ATP Is made in mitochondria (5M)

Answer 2

ATP produced in kerb cycle 
link reaction produced reduced coenzyme 
electrons released from NADH
electrons pass along ETC
energy released from ATP+pi--->ATP

Question 3

how acetyl coenzyme A is formed in the link reaction

Answer 3

pyruvate oxidised to acetate
loses 2 hydrogen and CO2
acetate combines with a molecule called coenzyme At to produce acetyl coenzyme A

Question 4

why converting pyruvate to lactate allows continued production of ATP during anaerobic respiration

Answer 4

NADH is oxidised to NAD

NAD used in glycolysis

Question 5

lactate is converted back to pyruvate when they are well supplied with oxygen

Answer 5

pyruvate used in aerobic respiration

lactate/ lattice acid is toxic/ harmful

Question 6

where does glycolysis take place

Answer 6

cytoplasm

Question 7

describe the part played by the inner membrane of a mitochondrion in producing ATP (4M)

Answer 7

electrons transferred down electron transport chain provide energy to take protons between membrane
protons pass through membrane into matrix through ATPase
energy used to combine ADP and phosphate to produce ATP