Respiration in Plants Question 11
11. In which one of the following processes $CO_2$ in not released?
(a) Aerobic respiration in plants
(b) Aerobic respiration in animals
(c) Alcoholic fermentation
(d) Lactate fermentation
Show Answer
Answer : d
Hints & Solutions
(d) Lactic acid fermentation occurs in lactic acid bacteria (Lactobacillus) and muscles (Human). Pyruvic acid produced in glycolysis is reduced by $NADH_2$ to form lactic acid without producing carbon dioxide.
$CH_3COCOOH + NADH_2 \xrightarrow[\text{FMN, Zn}^{2+}] {\text{Lactate dehydrogenase}} \underset{(Lactic acid)} {CH_3CHOHCOOH} + NAD$
