1 Aerobic respiration is made up of several stages.
(a) Which is the correct order of the stages of respiration required for the complete
oxidation of glucose?
(1)
A
B
C
D
glycolysis Krebs cycle link reaction
glycolysis link reaction Krebs cycle
link reaction Krebs cycle glycolysis
Krebs...
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Pearson Edexcel International Advanced Level
Wednesday 17 January 2024
Morning (Time: 1 hour 45 minutes) Paper
reference WBI15/01
Biology
International Advanced Level
UNIT 5: Respiration, Internal Environment,
Coordination and Gene Technology
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1 Aerobic respiration is made up of several stages.
(a) Which is the correct order of the stages of respiration required for the complete
oxidation of glucose?
(1)
A glycolysis Krebs cycle link reaction
B glycolysis link reaction Krebs cycle
C link reaction Krebs cycle glycolysis
D Krebs cycle glycolysis link reaction
(b) Write a balanced equation for the complete oxidation of glucose in
aerobic respiration.
(2)
(c) The equation shows the aerobic respiration of a lipid.
2 C18H34O2 + 51 O2 → 36 CO2 + 34 H2O
(i) Which is the respiratory quotient when this lipid is used in aerobic respiration?
(1)
A 0.67
B 0.71
C 1.06
D 1.42
2
*P73453A0232*
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(ii) The complete oxidation of one molecule of this lipid produces 122 molecules
of ATP.
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One molecule of this lipid contains 12 244 kJ of energy.
One molecule of ATP yields 30.51 kJ of the energy.
Calculate the percentage of energy in this lipid molecule that can be
converted to energy in ATP.
Give your answer to three significant figures.
(2)
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