Enzymes are made up of: MCQ with Answer and Explanation

Enzymes are made up of:
A. Fats
B. Proteins
C. Carbohydrates
D. Nucleic acids
Answer: Option B
Solution (By JKExamLibrary)
Enzymes are proteins (except ribozymes which are RNA). They have specific 3D structures with active sites. They catalyze biological reactions. Denatured by heat or extreme pH.

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Practice More chemistry Questions

Question #1
The combined gas law is represented by:
A. V/T = constant
B. PV = nRT
C. PV = constant
D. P₁V₁/T₁ = P₂V₂/T₂

Correct Answer: Option D


Explanation:
Combined gas law combines Boyle's, Charles', and Gay-Lussac's laws for a fixed mass of gas. It relates P, V, T when all change. PV=nRT is ideal gas equation for n moles.

This question belongs to: Science chemistry
Question #2
The phenomenon where a product of a reaction acts as a catalyst for the same reaction is called:
A. Enzyme catalysis
B. Heterogeneous catalysis
C. Negative catalysis
D. Autocatalysis

Correct Answer: Option D


Explanation:
Autocatalysis occurs when one of the products of a chemical reaction acts as a catalyst for that same reaction. As the reaction proceeds and the product accumulates, the rate of the reaction increases. A classic example is the oxidation of oxalic acid by potassium permanganate, where the Mn2+ ions produced catalyze the reaction.

This question belongs to: Science chemistry
Question #3
Which of the following is a synthetic detergent?
A. Sodium lauryl sulfate
B. Soap
C. Cellulose
D. Starch

Correct Answer: Option A


Explanation:
Sodium lauryl sulfate (SLS) is a synthetic detergent (surfactant) used in shampoos and toothpaste. Soap is a natural detergent from fats/oils. Starch and cellulose are natural polymers, not detergents. SLS has a sulfate group and works well in hard water.

This question belongs to: Science chemistry