ICSE Class 6 Answered
Explain the process of breakdown of glucose in a cell presence of oxygen and in absence of oxygen
Asked by kumarrohit4583 | 05 Jan, 2019, 07:43: PM
Expert 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. Pyruvate is broken down in different ways in different organisms as shown below:
i.In yeast cells, during fermentation, pyruvate is converted into ethanol and carbon dioxide in the absence of oxygen.
ii. In mitochondria, breakdown of pyruvate takes place in presence of oxygen to give rise three molecules of carbon dioxide and water.
iii. Sometimes, when there is lack of oxygen, especially during vigorous activity, in our muscles, pyruvate is converted into lactic acid. Concept insight: Students should know various types of respiration.
Answered by Sivanand Patnaik | 05 Jan, 2019, 08:19: PM
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