Question

Reaction catalysed by enzyme 'Maltase'.
a.) $Starch\quad \longrightarrow \quad Maltose$
b.) $Maltose\quad \longrightarrow \quad Glucose$
c.) $Sucrose\quad \longrightarrow \quad Glucose$
d.) $Glucose\quad \longrightarrow \quad Alcohol$

Answer 1

Hint: Enzymes are highly selective catalysts. It means that each enzyme speeds up only a particular reaction.

Complete step by step answer:
Enzymes are biological molecules that significantly speed up the reaction rate of virtually all of the chemical reactions that take place within a cell. The biological processes that occur within all living organisms are chemical reactions, and most are regulated by enzymes. Now let's see the reactions one by one.
$Starch\quad \longrightarrow \quad Maltose$:
The enzyme diastase converts starch into maltose. During this process, the diastase enzymes start acting on the starches, breaking them up into sugar sand this process is called saccharification.
$Maltose\quad \longrightarrow \quad Glucose$
The enzyme maltase is responsible for the conversion of maltose to glucose.
Maltose is a disaccharide and on hydrolysis, it gives glucose.
$Maltose\quad ({ C }_{ 12 }{ H }_{ 22 }{ O }_{ 11 })\quad \xrightarrow [ 'Maltase' ]{ Hydrolysis } \quad Glucose({ C }_{ 6 }{ H }_{ 12 }{ O }_{ 6 })\quad +\quad Glucose({ C }_{ 6 }{ H }_{ 12 }{ O }_{ 6 })$
$Sucrose\quad \longrightarrow \quad Glucose$
The enzyme in humans that converts sucrose to glucose and fructose is actually called sucrase, but invertase is used because it is much cheaper and easier to purchase. As the reaction involved in separation of the monosaccharide present in sucrose takes more time to complete, thus, in order to complete the reaction fast enzyme, sucrase is used. This hydrolyses the bond present in between the monosaccharide and makes it separated from one another.
$Glucose\quad \longrightarrow \quad Alcohol$
The enzyme zymase can convert glucose to ethanol. This enzyme naturally occurs in yeast and other anaerobic organisms. This enzyme is used in the preparation of alcoholic beverages commercially.
Therefore, from the above explanations we can see that the reaction catalysed by enzyme 'Maltase' is $Maltose\quad \longrightarrow \quad Glucose$.
So, the correct answer is “Option B”.

Note:There is a difference between maltose and maltase. Do not confuse between the two maltose is a chemical compound, a sugar that exists in wheat as has the formula ${C}_{12}{H}_{22}{O}_{11}$. Maltase is an enzyme.