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Aerobic Respiration

Why are yeast...

Question

Why are yeast cells used to make wines and beers? What do humans produce during anaerobic respiration? [2 MARKS]

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Solution

Reason: 1 Mark
Product of anaerobic respiration: 1 Mark

Under anaerobic conditions, yeast produces alcohol. They are, therefore, used to make wine and beer.
C₆H₁₂O₆ ---------------> 2C₂H₅OH + 2CO₂ + 2ATP
During anaerobic respiration, humans produce lactic acid in the muscles. The equation for this process is as follows:
Glucose ----------> Latic acid + Energy

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Q. Question 2
Yeast is used in wine and beer industries because it respires

(a) aerobically producing oxygen
(b) aerobically producing alcohol
(c) anaerobically producing alcohol
(d) anaerobically producing

C O_{2}

Why are yeast cells used to produce wine?

Q. Yeast is used in wine and beer industries because it respires _____________.

What is anaerobic respiration? What happens during anaerobic respiration in yeast?

Q. Identify the correct statement about respiration.
1. Without oxygen, cellular respiration is not possible in humans.
2. Pyruvate is produced only in the case of aerobic respiration.
3. Anaerobic respiration is possible in yeast and humans.
4. The energy produced during cellular respiration is stored as ATP.

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