Respiration

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Aerobic respiration

Subtopic

Aerobic respiration under Respiration for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which of these chemical formulas represents a liquid product of aerobic respiration?$
A. $CO_2$
B. $H_2O$
C. $O_2$
D. $C_6H_{12}O_6$
2.
$What role does the heart play in supporting aerobic respiration in the legs of a marathon runner?$
A. $It produces the glucose needed$
B. $It pumps oxygenated blood and glucose to the leg muscles$
C. $It stores the carbon dioxide produced$
D. $It converts lactic acid into oxygen$
3.
$Which of these is an example of 'active transport' that requires energy from respiration?$
A. $Oxygen diffusing into the blood$
B. $Moving ions against a concentration gradient$
C. $Carbon dioxide leaving the lungs$
D. $Water moving into a cell by osmosis$

Download the worksheet for Respiration - Aerobic respiration to practice offline. It includes additional chapter-level practice questions.

Anaerobic respiration

Subtopic

Anaerobic respiration under Respiration for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

1.
$What is the chemical formula for glucose, the starting point for both types of respiration?$
A. $C_2H_5OH$
B. $CO_2$
C. $C_6H_{12}O_6$
D. $C_3H_6O_3$
2.
$Why does a person continue to pant after they have finished a fast run?$
A. $To cool down their lungs$
B. $To provide oxygen to convert lactic acid to carbon dioxide and water$
C. $To increase the amount of glucose in their blood$
D. $To reduce the amount of water in their body$
3.
$Which of these is NOT a product of anaerobic respiration in humans?$
A. $Lactic acid$
B. $ATP$
C. $Heat$
D. $Ethanol$

Download the worksheet for Respiration - Anaerobic respiration to practice offline. It includes additional chapter-level practice questions.