Topics:
Animal Nutrition, Animal Refresher
Conditions for Glycolysis
Glycolysis takes place in cytoplasm under:
- Aerobic condition
- Anaerobic condition
- Both a & b — Correct Answer
- None
Explanation:
Correct Answer: Both aerobic and anaerobic conditions
Glycolysis (Embden-Meyerhof-Parnas pathway) occurs in the cytoplasm and can proceed under both aerobic and anaerobic conditions. Under aerobic conditions, pyruvate enters the mitochondria; under anaerobic conditions, pyruvate is converted to lactate (in animals) or ethanol (in yeast).
Glycolysis — Key Facts
| Parameter | Detail |
|---|---|
| Location | Cytoplasm (cytosol) |
| Conditions | Both aerobic AND anaerobic |
| Substrate | Glucose (or Glycogen → +1 ATP) |
| Net ATP yield (aerobic) | 38 ATP (complete oxidation) |
| Net ATP yield (anaerobic) | 2 ATP (net; 4 produced − 2 invested) |
| End product (aerobic) | Pyruvate → enters TCA cycle |
| End product (anaerobic) | Lactate (animals) / Ethanol (yeast) |
Why Other Options Are Wrong
- Aerobic only → incorrect; glycolysis was the original anaerobic pathway evolved in early life and still functions anaerobically (e.g., in exercising muscle).
- Anaerobic only → incorrect; glycolysis also occurs under aerobic conditions as the first step of full glucose oxidation.
- None → both conditions are correct.
📚 About this Topic — Animal Nutrition
This multiple choice question is from Animal Nutrition, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Nutrition to strengthen your preparation.
