Question

a student listed some differences between alcoholic fermentation and lactic acid fermentation. which difference(s) did the student list incorrectly? 3 only 1 only 2 and 3 1 and 2

Explanation:

Step1: Recall alcoholic fermentation

In alcoholic fermentation which occurs in yeast cells, glucose is converted into ethanol and carbon - dioxide is released. The chemical equation is $C_6H_{12}O_6
ightarrow 2C_2H_5OH + 2CO_2$.

Step2: Recall lactic - acid fermentation

In lactic - acid fermentation which occurs in muscle cells (among other places), glucose is converted into lactic acid and no carbon - dioxide is released. The chemical equation is $C_6H_{12}O_6
ightarrow 2C_3H_6O_3$.

Step3: Analyze the student's list

Statement 1: Alcoholic fermentation occurs in yeast cells and lactic - acid fermentation occurs in muscle cells, which is correct. Statement 2: Glucose is converted into ethanol in alcoholic fermentation and into lactic acid in lactic - acid fermentation, which is correct. Statement 3: In alcoholic fermentation, carbon - dioxide is released and in lactic - acid fermentation, carbon - dioxide is not released. So, statement 3 is incorrect.

Answer:

A. 3 only