ZIMSEC A-Level Biology
8.6.3Respiration
Respiration in ZIMSEC A-Level Biology: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic81 practice questions4 lessons
Learning objectives
What the syllabus expects you to be able to do.
- 8.6.3.1Draw the detailed structure of a mitochondrion.
- 8.6.3.2Outline glycolysis, the formation of acetyl coenzyme A from pyruvate and the Krebs cycle.
- 8.6.3.3Explain decarboxylation and dehydrogenation in the link reaction and the Krebs cycle.
- 8.6.3.4Describe oxidative phosphorylation, including the electron transport chain and the roles of oxygen and NAD.
- 8.6.3.5Outline anaerobic respiration in plants or yeast and in animals, and design experiments to compare rates of fermentation.
- 8.6.3.6Explain the relative energy values of carbohydrates, lipids and proteins as respiratory substrates.
- 8.6.3.7Define and calculate the respiratory quotient (RQ), including with simple respirometers, and investigate the effect of temperature on respiration rate.
Lessons
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Anaerobic respiration: lactate and ethanol fermentation
40 min
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Glycolysis, the link reaction and the Krebs cycle
45 min
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Oxidative phosphorylation and the mitochondrion
40 min
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Respiratory substrates, RQ and respirometers
45 min
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Sample question
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