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.

Options:
A. 1, 2 & 3
B. 3 & 4
C. 1 & 4
D. 2 & 3
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Solution

Correct Option: Option B

Cellular respiration, whether aerobic or anaerobic, is a metabolic process which converts nutrient into energy (stored in the form of ATP) and waste products. Aerobic respiration uses the oxygen gathered during the process of respiration to facilitate ATP synthesis.
It always takes place in the presence of oxygen. Whereas, anaerobic respiration occurs in absence/lack of oxygen. In anerobic respiration yeast produces ethanol as end product whereas in muscles lactic acid is produced as end product.
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The energy yield in terms of ATP is higher in aerobic respiration than during anaerobic respiration. Why is there anaerobic respiration even in organisms that live in aerobic condition like human beings and angiosperms?

Q. Fill in the blanks with the correct words.

1. .................... (Inhalation/Exhalation) is the first step in breathing.
2. Fish absorb oxygen from water through .................... (gills/diffusion).
3. The exchange of gases at the cellular level is called .................... (breathing/respiration).
4. Plants respire through .................... (stomata/seed).
5. Respiration in the absence of oxygen is .................... (aerobic/anaerobic).

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.

Q. Identify the correct statement about cellular respiration.
A) Alcohol fermentation is an example of aerobic respiration.
B) In aerobic respiration glucose breaks down to ethanol, carbon dioxide and energy.
C) Cellular respiration is same as breathing.
D) During aerobic respiration, pyruvate gets broken down into carbon dioxide, water and energy.

Select True(T) or False(F) in the following statements regarding aerobic and anaerobic respiration.

1. Aerobic respiration proceeds in the presence of oxygen.
2. Anaerobic respiration proceeds in the absence of oxygen.
3. In anaerobic respiration end product is water.
4. Aerobic respiration occurs normally throughout life.

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