FBISE 9th Class Biology Chapter 6 Enzymes Short Questions Answers

FBISE 9th class Biology Chapter 6 Enzymes Short Questions with answers are combined for all 9th class(Matric/ssc) Level students. Here You can prepare all Biology Chapter 6 Enzymes short question in unique way and also attempt quiz related to this chapter. Just Click on Short Question and below Answer automatically shown. After each question you can give like/dislike to tell other students how its useful for each.

Class/Subject: 9th Class Biology

Chapter Name: Enzymes

Board: FederalĀ  Board

Helpful For:

  • Federal Boards 9th Class Biology Annual Examination
  • Schools 9th Class Biology December Test
  • Federal 9th Class Biology Test
  • Entry Test questions related Biology

FBISE 9th Class Biology Chapter 6 Enzymes Short Questions Answers

What are enzymes?

Enzymes are proteins that catalyze (i.e. speed up) biochemical reactions and are not changed during the reaction.

Define Metabolism?

Metabolism is the set of biochemical reactions that occur in living organisms to maintain life.

Who gave the concept of Metabolism?

The concept of Metabolism was first of all given by Ibn-e-Nafees, who stated that “The body and its part are always changing”.

What is the difference between substrate and product?

The molecules at which enzymes act are called a substrate, and the enzyme converts them into different molecules, called products.

Define Activation Energy?

The amount of energy required by all chemical reactions to break chemical bonds and begin the reaction.

What are active sites?

The small portion of an enzyme that takes part in a chemical reaction is known as active sites.

On what substrate Amylase act?

Amylase is an enzyme that acts on starch and converts it into maltose.

Define Anabolism?

Anabolism is the total series of chemical reactions involved in the synthesis of compounds e.g. Photosynthesis and assimilation.

What are Biocatalysts?

Enzymes are known as biocatalyst because they speed up and regulate the metabolic pathway in living organisms.

Why enzymes are crucial to metabolism?

Enzymes are crucial to metabolism because they act as biocatalysts and speed up and regulate the metabolic pathways. During metabolism, chemicals are transformed from one form to another by enzymes.

How specificity of enzymes is determined?

The specificity of different enzymes is determined by the shapes of their active sites. Active sites possess specific geometric shapes that fit with specific substrates.

Who first used the term enzyme?

In 1878, German Physiologist Winhelm Kuhne first used the term Enzyme.

Write down the two characteristics of enzymes?

1. Almost all enzymes are proteins i.e. they are made of amino acids.
2. Enzymes are usually very specific for the type of reaction and the nature of their substrate.

What are Co-factors?

Some enzymes do not need any additional components to work. However, others require some components which are called the Co-factor.

Name the vitamins which are act as coenzymes?

Riboflavin, Thiamine and Folic Acid

Name only factors affecting the rate of enzyme action?

Temperature, Substrate concentration, and pH.

Define Optimum temperature?

Every enzyme works at its maximum rate at a specific temperature which is called the optimum temperature of that enzyme.

What do you mean by denaturation of an enzyme? How temperature affects the rate of enzyme reaction?

When the temperature rises to a certain limit, the heat adds in the activation energy and also provides kinetic energy for the reaction. So the reactions are accelerated. But when the temperature is raised well above the optimum temperature, heat energy increases the vibrations of atoms of enzyme and the globular structure of the enzyme is lost. This is known as denaturation of the enzyme. Denaturation results in a rapid decrease in the rate of enzyme action and it may be blocked completely.

Define Catabolism?

Catabolism is the series of chemical reactions in which complex or large molecules are broken down e.g. Respiration and digestion.

Define Catalysts?

These are the chemical substances that speed up a chemical reaction e.g. Nickel is used as a catalyst during the hydrogenation of palm oil into banaspati ghee.

Define Co-enzymes?

If organic co-factors are loosely attached with the enzyme they are called coenzymes. Some important vitamins e.g. riboflavin, thiamine, and the folic acid act as co-enzymes.

What is the main use of enzymes in the paper industry?

Enzymes break starch to lower its viscosity that aids in making paper.

Define protease?

Protease is an enzyme that breaks peptide bonds in a protein.

What is the optimum temperature for human enzymes?

The optimum temperature for the maximum working speed of human enzymes is 37 degrees.

Describe the Induced fit model?

The induced fit model is more acceptable than the lock and key model. In 1958, American biologist Daniel Koshland suggested a modification to the lock and key model and proposed the induced fit model. According to this model the active sites are not rigid structures rather it is moded into the required shape to perform its function.

What is the prosthetic group?

If organic cofactors are tightly bound to the enzyme, they are called the prosthetic group.

Define optimum pH?

All enzymes work at their maximum rate in a narrow range of pH, called the optimum pH.

What is Enzyme substrate Complex?

When enzymes attach with the substrate, a temporary enzyme-substrate complex (ES) is formed. The enzyme catalyzes the reaction, the substrate is transformed into a product, the (ES) complex breaks, and enzyme products are released.

Define Lipase?

Lipase is the enzyme that acts on lipids and digests them into fatty acids and glycerol.

Give any two uses of enzymes?

Food Industry, Brewing Industry

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