Question

What are the products of ethyl alcohol fermentation?

• A. $C{O}_2,H_{2}O,\text{energy}$
• B. $C{O}_2,\text{ethanol},\text{energy}$
• C. Lactic acid, energy
• D. None of these

Answer 1

The correct option is B $C{O}_2,\text{ethanol},\text{energy}$

The breaking down of the respiratory substrates in the presence of $O_2$ to liberate energy is called aerobic respiration.

$\stackrel{\text{glucose}}{C_6{H}_{12}{O}_6}+\stackrel{\text{oxygen}}{6O_2}\to \stackrel{\text{carbon dioxide}}{6C{O}_2}+\stackrel{\text{water}}{6H_{2}O}+\stackrel{\text{energy}}{\text{ATP}}$

Glucose undergoes complete oxidation in the presence of $O_2$, liberates $C{O}_2,H_{2}O$ and energy.

Fermentation is the chemical breakdown of substances in the absence of $O_2$ to liberate energy. Based on the product formed, the fermentation can be of two types - ethyl alcohol fermentation and lactic acid fermentation.

$C{O}_2$, ethanol, energy are the products of ethyl alcohol fermentation. Whereas lactic acid and energy are the products of lactic acid fermentation.