EVERYDAY SCIENCE

SCIENCE

RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The correct word equation for lactic acid fermentation is
A
glucose
B
glucose
C
glucose + oxygen
D
lactic acid
Explanation: 

Detailed explanation-1: -Anaerobic respiration takes place in the cell cytoplasm and produces lactic acid. The chemical equation is C6H12O6-> 2C3H6O3 (Glucose-> Lactic acid).

Detailed explanation-2: -The simple equation for lactic acid fermentation is glucose—glycolysis—> 2 pyruvate—fermentation–> 2 lactic acid. That is to say that glucose is broken down by glycolysis into 2 pyruvates, and then those pyruvates are fermented to produce 2 lactic acid molecules.

Detailed explanation-3: -Lactic acid fermentation produces lactic acid (lactate) and NAD+. The NAD+ cycles back to allow glycolysis to continue so more ATP is made.

Detailed explanation-4: -(iii) In both lactic acid and alcoholic fermentation not much energy is released, less than 7% of the energy in glucose is released and not all of it is trapped as high energy bonds of ATP.

Detailed explanation-5: -C6H12O6 (aq)—-> 2C2H5OH (aq) + 2CO2(g) + 2ATP. You see the ATP at the end of the equation is the energy used to complete fermentation. In words, we say glucose produces ethanol and carbon dioxide.

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