Anaerobic Respiration Lactic Acid Fermentation


 
 
Concept Explanation
 

Anaerobic Respiration Lactic Acid Fermentation

Lactic acid fermentation: The process of incomplete breakdown of sugar into lactic acid and energy in some bacteria, e.g. in yogurt making, some bacteria cause milk to turn sour. These bacteria feed on sugar and break it into lactic acid. 

In our muscles, after vigorous physical exercise, glucose is metabolized to form lactic acid. The accumulation of lactic acid causes fatigue and muscle cramps after prolonged exercises. It can be summarized as:

dpi{100} fn_jvn Glucose(6;Carbon)xrightarrow[In;Cytoplasm]{Glycolysis}Pyruvic ;Acid (3;Carbon) + Energyxrightarrow[In;muscle;cells]{Lack;of;oxygen} 2Lactic;Acid (3;Carbon)+2ATP

Sample Questions
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Question : 1

Which of the following are correct ?

(a) Lactic acid fermentation is the process of incomplete breakdown of sugar into lactic acid and energy in some bacteria . e.g. in yogurt making, some bacteria cause milk to turn sour.

(b) The bacteria feed on sugar and break it into lactic acid. 

(c) The accumulation of lactic acid causes fatigue and muscle cramps after prolonged exercises.

Right Option : D
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Question : 2

Lactic acid is a product of ________________

Right Option : B
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Question : 3

During excercise, we get cramps in the legs due to the accumulaion of __________.

Right Option : C
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