Question

Observe the following reactions
I) Sucrose (aq) + H2O →[x] glucose + fructose
II) Glucose (aq) →[y] ethanol + CO2
What are $x$ and $y$ respectively? Identify the correct option from the following:

• A. Invertase, Zymase
• B. Zymase, Diastase
• C. Diastase, Zymase
• D. Diastase, Invertase

Hint:

For biochemical reactions, identify the type of reaction (e.g., hydrolysis, fermentation) and recall the specific enzyme associated with the substrate and products.

Answer 1

The Correct Option is A

Step 1: Analyze the first reaction
The reaction \ch{Sucrose (aq) + H2O →[x] glucose + fructose} involves the hydrolysis of sucrose, a disaccharide, into its monosaccharides, glucose and fructose. This process is catalyzed by the enzyme invertase, which breaks the glycosidic bond in sucrose. Thus, $x$ is Invertase. Step 2: Analyze the second reaction
The reaction \ch{Glucose (aq)→[y] ethanol + CO2} represents the fermentation of glucose, where glucose is converted into ethanol and carbon dioxide. This process is catalyzed by the enzyme zymase, typically found in yeast during alcoholic fermentation. Thus, $y$ is Zymase. Step 3: Match with options
$x$ = Invertase, $y$ = Zymase, which corresponds to option (1).