Given below are two statements.
$Statement-I$: Enzyme pyruvate dehydrogenase complex brings about oxidative decarboxylation of pyruvic acid.
$Statement-II$: Enzyme pyruvate dehydrogenase is not present in cytosol of prokaryotes.
In the light of the above statements, choose the correct answer from the options given below:

Read the following statements and choose the set of correct statements :
$(A)$ In fermentation,the reducing agent is $NADH + H^+$.
$(B)$ There are three major ways in which different cells handle pyruvic acid produced by glycolysis.
$(C)$ The complete oxidation of pyruvate occurs by the stepwise removal of all the hydrogen atoms,leaving two molecules of $CO_2$.
$(D)$ The $NADH$ synthesised in glycolysis is transferred into the mitochondria and undergoes oxidative phosphorylation.
$(E)$ Complex-$IV$ of $ETS$ refers to cytochrome $c$ oxidase complex.
Choose the most appropriate answer from the options given below :

Select the correct option:
$(1)$ Fermentation / Aerobic respiration does not have an electron transport system.
$(2)$ Combustion / Respiration is a biochemical process.

$A$: Carbohydrates are the primary source of energy in living organisms.
$R$: Glucose is the common substrate used in respiration.

In aerobic respiration,which of the following statements is correct regarding the respiratory substrate?

Given below are two statements:
Statement-$I$: Acetyl $CoA$ formation takes place by oxidative decarboxylation of pyruvic acid.
Statement-$II$: $\beta$-oxidation of fatty acid produces acetyl $CoA$.
In the light of above statements,choose the most appropriate answer from the options given below.