Question detail

Which statement correctly compares the products of aerobic and anaerobic respiration?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Respiration

Question

A. Aerobic respiration forms carbon dioxide and water; anaerobic respiration forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
B. Aerobic and anaerobic respiration always form exactly the same products.
C. Aerobic respiration forms lactic acid, while anaerobic respiration forms only water.
D. Anaerobic respiration in yeast forms oxygen and glucose as its main products.

Answer

Aerobic respiration forms carbon dioxide and water; anaerobic respiration forms lactic acid in muscles or ethanol and carbon dioxide in yeast. Aerobic respiration forms carbon dioxide and water. Anaerobic respiration forms lactic acid in muscles or ethanol and carbon dioxide in yeast.

Explanation

The correct option is: Aerobic respiration forms carbon dioxide and water; anaerobic respiration forms lactic acid in muscles or ethanol and carbon dioxide in yeast. The products are different. Aerobic respiration produces carbon dioxide and water, while anaerobic respiration produces lactic acid in muscles or ethanol and carbon dioxide in yeast. The distractors either reverse the oxygen/product/energy relationship or claim both types of respiration are the same, which is not accurate for AQA GCSE Biology.

Common mistake

Confusing Products of Respiration

Students often confuse the products of aerobic and anaerobic respiration, mistakenly stating that both processes produce the same end products.

Remember that aerobic respiration produces carbon dioxide and water, while anaerobic respiration in muscles produces lactic acid, and in yeast, it produces ethanol and carbon dioxide. Use mnemonic devices to help remember the different products.

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