Question

Explain the break down of glucose by various pathways​

Answer 1

Answer:

Glucose is broken down into a three carbon molecule called pyruvate in the cell cytoplasm. Pyruvate is further broken down by different ways to provide energy in various organisms. ... i.In yeast cells, during fermentation, pyruvate is converted into ethanol and carbon dioxide in the absence of oxygen.

Explanation:

(i) Aerobic respiration takes place in the mitochondria in the presence of oxygen. Pyruvic acid is converted into carbon dioxide, and water thus releasing a lot of energy. (ii) Anaerobic respiration takes place in the cytoplasm in the absence of oxygen. Pyruvic acid is converted either into CO2 and ethanol (in case of microbes, i.e., fermentation in yeast) or into lactic acid (in the case of muscle cells during sudden activity in humans.)

Answer 2

Answer:

At first, glucose is broken down into three-carbon molecule called pyruvate. Pyruvic acid is converted into carbon dioxide, and water thus releasing a lot of energy.

Explanation:

(ii) Anaerobic respiration takes place in the cytoplasm in the absence of oxygen.