Question

what are the different ways in which glucose is oxidised to provide energy in various organisms?
OR
explain the different pathways of breakdown of glucose in living organisms?


plz tell me can I write same anwer for this question
or are they different​

Answer 1

Answer:

What are the different ways in which glucose is oxidized to provide energy in various organisms?

Glucose is the vital energy source for all the organisms. The nutrition consumed is converted into carbohydrates in which glucose is the key ingredient. The glucose is oxidized to provide energy to the organism.

Breakdown of glucose

We know glucose is a huge molecule and breaks down into different smaller units. At first glucose which contains 6 carbon molecules is broken in the cytoplasm of cells of all organisms. In this process, we obtain a 3 carbon molecule compound called pyruvate. Further break down of pyruvate takes place in different manners in different organisms.

Different ways in which glucose breaks down

Following are the different ways in which the breakdown of glucose takes place

Anaerobic Respiration

The anaerobic respiration process takes place in the absence of oxygen. For example: In yeast during fermentation. In this process, the pyruvate is converted into ethanol and carbon dioxide.

Aerobic Respiration

In aerobic respiration, breakdown of pyruvate takes place in the presence of oxygen to give rise to 3 molecules of carbon dioxide and water. The release of energy in aerobic respiration is much more than anaerobic respiration.

Lack of Oxygen

At times when there is a lack of oxygen in our body, mainly during vigorous activity, in our muscles, pyruvate is converted into lactic acid which is a 3 carbon molecule compound. The formation of lactic acid in muscles causes cramp.

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Answer 2

ᴏᴜᴇsᴛɪᴏɴ:

Explain the three pathways of the breakdown of glucose.

ᴀɴsᴡᴇʀ:

At first, glucose is broken down intothree-carbon molecule called pyruvate. This process happens in the cytoplasm of cells of all organisms. On the basis of presence or absence of oxygen. (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.)

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