Biology 9th Class Chapter 7(Bioenergetics) Online Short Questions with Answers Preparationj

Question # 1

Define Metabolism. Difference between catabolism and anabolism.

Ans 1: Metabolism:
Metabolism is the sum of all chemical reactions that occur with an organism to sustain life.
Ans 2: Catabolism :
Dfine:
It involves the breakdown of complex molecules into simpler ones, releasing energy in the process.
Example:
Cellular respiration i.e. oxidation of food into CO2 and H2O to get energy
Lipolysis i.e. break-down of lipids into fatty acids and glycerol, which can be used for energy production.
Ans 3: Anabolism:
Define: Involves building up complex molecules from simpler ones, thsi process consumes energy.
Example:
i. Photosynthesis i.e. conversion of carbon dioxide and water into glucose andoxygen using sunlight.
ii. Protein syntesis i.e. formation of proteins form amino acids, which are vital for cell structure and function.

Question # 2

Difference between Catalyst and enzyme.

Ans 1: Catalyst :
Catalyst is a substance that increases rate of a chemical reaction without iteslf undergoing any permanent chemical change.
Ans 2: Enzyme:
Enzymes ar eprotins that speed up biochemical reations and are not changed during the reaction.

Question # 3

Why small quantity of enzyme is engough for catalysing large number of substrate molecules into products.

Ans 1: Because enxymes have high capability to conert giant quantities of substrate into product. Enxymes increase the ate of reactionand remain unaffected by reaction which is being gatalyzed.

Question # 4

Which type of metabolism demands input of energy. Give an examples

Ans 1: Anabolism demands input of energy photosyntheiss. i.e., conversion of carbon dioxide and water into glucose and oxygen using sunlight.

Question # 5

Provide two examples of enzymes that operate optimally at specific pH.

Ans 1: Pepsin work in acidic medium trypsin works in alkaline medium.

Question # 6

Define an enzyme. What is its role in metabolism.

Ans 1: Define: Enzymes are biologicla catalysts that speed up chemical reactions in living organisms without being consumed in the process. They ar eprimarily proins and highly specific to their substrates.
Ans 2: Role:Enzymes play an important role in controlling cellular metaboiism. An enzyme function sby lowering the activation enery of a chemicla reaction inside the cells. Activation enery is the minimum amount of energy needed to from or break chemical bounds and convert reactants to products.

Question # 7

Provide an example of a specific enzyme substrate pair.

Ans 1: The enxyme protease will not work on starh which is broken down by an enzyme amylase.

Question # 8

Which type of enzyme inhibitors inhibit the enzymes without attaching to the active site.

Ans 1: Non-competitive inbibitors do not attache to the active site of an enxyme. Rather, they attach to some other locationof enzyme.

Question # 9

Define co -factors.Give two example.

Ans 1: Some enxymes require non -Protein molecules or ions to work, these molecules or ions are called cofactors. Co factors can either be inorganic e.g metal ions or organic e.g. Flavin and haem.

Question # 10

Why enzymes are called biological catalyst.

Ans 1: Enzymes are known as biocatalysts because they speed up ad regulate the metabolic pathways in living organisms. Enxymes are mostly proteins that catalyze a chemical reaction in our body. They function as a catalyst that speed up th reaction by lowering the activation energy.

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Define Metabolism. Difference between catabolism and anabolism.

Difference between Catalyst and enzyme.

Why small quantity of enzyme is engough for catalysing large number of substrate molecules into products.

Which type of metabolism demands input of energy. Give an examples

Provide two examples of enzymes that operate optimally at specific pH.

Define an enzyme. What is its role in metabolism.

Provide an example of a specific enzyme substrate pair.

Which type of enzyme inhibitors inhibit the enzymes without attaching to the active site.

Define co -factors.Give two example.

Why enzymes are called biological catalyst.

Prepare Complete Set Wise Questions For Chapter 7 "9th Class Biology Urdu Medium Chapter 7 Preparation "

Set 1

Set 2

9th Class Biology Urdu Medium Chapter 7 Preparation - Set 1

Define Metabolism. Difference between catabolism and anabolism.

Difference between Catalyst and enzyme.

Why small quantity of enzyme is engough for catalysing large number of substrate molecules into products.

Which type of metabolism demands input of energy. Give an examples

Provide two examples of enzymes that operate optimally at specific pH.

Define an enzyme. What is its role in metabolism.

Provide an example of a specific enzyme substrate pair.

Which type of enzyme inhibitors inhibit the enzymes without attaching to the active site.

Define co -factors.Give two example.

Why enzymes are called biological catalyst.

9th Class Biology Urdu Medium Chapter 7 Preparation - Set 2

Define an enzyme. What is its role in metabolism.

What do you mean by saturation of active sites.

Name the factors affecting enzyme activity.

Why are enxyme specific and why can't each one speed up many different reactions.

Difference between Catalyst and enzyme.

Why small quantity of enzyme is engough for catalysing large number of substrate molecules into products.

Why enzymes are called biological catalyst.

What is teh active site of enzyme? State its importance in enxyme speciaficity.

Define co -factors.Give two example.

What do you mean by Optimum pH.

9th Biology Urdu Medium Chapter 7 Preperation

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