Home
Class 12
CHEMISTRY
Assertion: All enzymes found in cells ar...

Assertion: All enzymes found in cells are invariably proteins which catalyse biological reactions.
Reason : Enzymes act efficiently at a moderate temperature and pH.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the assertion and reason provided in the question, we will break down the statements and evaluate their validity step by step. ### Step 1: Evaluate the Assertion **Assertion:** "All enzymes found in cells are invariably proteins which catalyse biological reactions." - **Analysis:** This statement is not entirely true. While the majority of enzymes are proteins, there is an exception known as ribozymes. Ribozyme is a type of RNA that can catalyze biochemical reactions, thus it is a non-protein enzyme. Therefore, the assertion is **false**. ### Step 2: Evaluate the Reason **Reason:** "Enzymes act efficiently at a moderate temperature and pH." - **Analysis:** This statement is true. Enzymes have optimal conditions under which they function best, typically at moderate temperatures and specific pH levels. Deviations from these conditions can lead to decreased enzyme activity or denaturation. Therefore, the reason is **true**. ### Step 3: Conclusion - Since the assertion is false and the reason is true, we conclude that the relationship between the two statements does not hold. The correct answer would be that the assertion is false, and the reason is true. ### Final Answer The assertion is false, and the reason is true. ---
Promotional Banner

Topper's Solved these Questions

  • BIOMOLECULES

    NCERT FINGERTIPS ENGLISH|Exercise Carbohydrates|35 Videos

  • BIOMOLECULES

    NCERT FINGERTIPS ENGLISH|Exercise Proteins|30 Videos

  • BIOMOLECULES

    NCERT FINGERTIPS ENGLISH|Exercise EXEMPLER PROBLEMS|16 Videos

  • AMINES

    NCERT FINGERTIPS ENGLISH|Exercise ASSERTION & REASON CORNER|14 Videos

  • CHEMICAL KINETICS

    NCERT FINGERTIPS ENGLISH|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

All enzymes work best at the same optimum temperature and same pH.

which of the following reaction is catalysed by enzyme maltase?

Enzymes are inorganic catalysts which accelerate the rate of biological reactions and do not consume at the end of reaction.

All enzymes are not proteins. Which of the following enzyme is not a protein?

[A] : Enzymes are proteins which catalyse biochemical reactions . [R] : The enzyme itself is unchanged in the reaction , its presence allows the reaction to take place .

Assertion : Inorganic catalysts work efficiently at high temperature. Reason : Enzymes get damaged at high temperature.

Assertion : All enzymes are made up of proteins and all proteins have three dimensional structures. Reason : Secondary structures of proteins are sequence of amino acids.

Assertion : All enzymes are not proteins. Reason : RNA molecules that possess catalytic activity are called ribozymes.

A reaction catalysed by an enzyme not found in mitochondiral matrix

Assertion : A bacterial cell with restriction enzymes will be easily infected and lysed by bacteriophages. Reason : Restriction enzymes catalyse synthesis of protective coat around bacterial cell that prevents bacteriophage attack.