Question

during cellular respiration, a six carbon molecule breaks down into a three carbon molecule Q
1) identify P and Q
2) Q is breakdown in the absence of oxygen into R during fermentation. Identify R and give one example
3)Q breakdown into a organic acid S in the lack of oxygen.Identify S with example and write the effect of S ​

Answer 1

Answer:

1)P→Glucose

Q→Pyruvate

The process of conversion of Gulcose into Pyruvate is known as Glycolysis.

2)R→Ethanoic acid or Ethanol

Pyruvate breaks down in the absence of Oxygen to form ethanol and release small amounts of energy

This process occurs in the mitochondria of yeast cell.

•Uses of fermentation:

1. This process is applied for preservation of sour food

2.Also for the production of alcoholic beverages like wine and beer

3)S→Lactic acid

During lack of oxygen,the human muscle cells produce lactic acid for providing energy for sudden activity like running etc.

Over accumulation of lactic acid causes muscle cramps.