Question

Products of anaerobic respiration are
(A) Ethyl alcohol and carbon monoxide
(B) Ethyl alcohol and lactic acid
(C) Lactic acid and glycogen
(D) Acetic acid and carbon dioxide

Answer 1

Hint: Products of anaerobic respiration include a colorless and volatile, flammable liquid and the second product formed is an organic acid that is white in solid-state and has a molar mass of ${ 9 }{ 0 }{ g }/{ mol }$.

Complete step by step answer:
Ethyl alcohol and lactic acid are the products formed by the anaerobic respiration. In anaerobic respiration, glucose breaks down in absence of oxygen.
- In anaerobic reaction, no carbon- dioxide or water is produced.
- The glucose does not break completely thus less energy is released in this type of respiration.
- It is commonly found in the case of yeast and certain other microorganisms.
Most organisms need oxygen for respiration but some organisms and tissues can still respire if the oxygen runs out.
In conditions of low or no oxygen, the method of anaerobic respiration occurs. The 'an' in 'anaerobic' means without.
During anaerobic respiration, in the oxidation of glucose not all of the energy will be released from the glucose molecule because it is just partially broken down. This means the oxidation of glucose is incomplete.
The reaction, therefore, releases much less energy than aerobic respiration - This implies that fewer molecules of ATP are often made.
Glucose in human muscle cells at the end is converted to lactic acid during anaerobic respiration:
The carboxylic acid may be a waste.
Some plants, microorganisms, and fungi like yeast can respire anaerobically - it's preferable to release less energy and make less ATP but remain alive.
Glucose in yeast cells is converted to Carbon dioxide and ethanol, which we ask simply as 'alcohol':
This reaction is additionally called fermentation.
So, the correct answer is ‘(B) Ethyl alcohol and lactic acid '.

Note: Some prokaryotes like bacteria and archaea that survive in low- oxygen environments depend on anaerobic respiration to break down fuels. As an example, some archaea called methanogens can use Carbon dioxide as a terminal electron acceptor, producing methane as a by- product.