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

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Online Short Questions For Chapter 7 "9th Class Biology Urdu Medium Chapter 7 Preparation "

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Biology (New Book) - 9th Class Biology Urdu Medium Chapter 7 Preparation

Question # 1

Name the factors affecting enzyme activity.

Ans 1: 1) Temprature
2) Substrate Conscentration.
3) pH

Question # 2

Difference between competitive and non competitive inhibition.

Ans 1: Competitive Inhibition:Some inhibitiors resemble the enxyme's substrate They compete with the substrate to attach to the active site of enxyme. Whe the inhibitor is attached to the active site. It blocks it and oes not allow the substrate to attach.Example:Examples of competitive inhibitors are antibioties. The antibiotic molecules compete with the substrates of bacterial enzymes. They attach to bacterial enzymes and inhibit them.
Ans 2: Non-Competivive inhibition : Some enxyme inhibitio do not have similarity to the substrate. They do not attach to the active site of enxyme. Rather they attach to some other location of enzyme. This attachement change sthe overall shape of enzyme and active site. so, this changed activ esite does not fit substrate and enxyme is inhibited Example: Heavy mtals like ercury and certain drugs used in cancer therapy.

Question # 3

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 # 4

Difference between Intractellular and extracellular enzymes.

Ans 1: Intracellular enzymes.:
Enzymes which remain inside the cell to speed up the reaction are called intracellular enzymes.
Example:
Enzymes of glycolysis working in cytoplasm.
Ans 2: Extractellular enzymes:
Enzymes that work outside the cell are called extracellular enzymes.
Example:
Pepsin enxyme working in he stomach cavity

Question # 5

Which protein digestign enxyme functions in acidic medium?

Ans 1: Pepsin is a protein digesting enzyme whcih functions in acidic medium.

Question # 6

What do you mean by Optimum pH.

Ans 1: Optimum pH is a measure of how acidic or basic a substance or solution is . It is neasured on pH scale of 0 to 14 with 7 being nautral.
Enzymes show maximum aactivity at a specific pH. called their optimum pH

Question # 7

How does pH affect enzyme activity.

Ans 1: Enzymes are sensitive to hydrogen ion concentration of he fuid in which they work. They show maximum acticity at a speecific pH. called their optimum pH.

Question # 8

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 # 9

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 # 10

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.

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

Set 1

10 Questions
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Set 2

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

Question # 1

Name the factors affecting enzyme activity.

Ans 1: 1) Temprature
2) Substrate Conscentration.
3) pH

Question # 2

Difference between competitive and non competitive inhibition.

Ans 1: Competitive Inhibition:Some inhibitiors resemble the enxyme's substrate They compete with the substrate to attach to the active site of enxyme. Whe the inhibitor is attached to the active site. It blocks it and oes not allow the substrate to attach.Example:Examples of competitive inhibitors are antibioties. The antibiotic molecules compete with the substrates of bacterial enzymes. They attach to bacterial enzymes and inhibit them.
Ans 2: Non-Competivive inhibition : Some enxyme inhibitio do not have similarity to the substrate. They do not attach to the active site of enxyme. Rather they attach to some other location of enzyme. This attachement change sthe overall shape of enzyme and active site. so, this changed activ esite does not fit substrate and enxyme is inhibited Example: Heavy mtals like ercury and certain drugs used in cancer therapy.

Question # 3

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 # 4

Difference between Intractellular and extracellular enzymes.

Ans 1: Intracellular enzymes.:
Enzymes which remain inside the cell to speed up the reaction are called intracellular enzymes.
Example:
Enzymes of glycolysis working in cytoplasm.
Ans 2: Extractellular enzymes:
Enzymes that work outside the cell are called extracellular enzymes.
Example:
Pepsin enxyme working in he stomach cavity

Question # 5

Which protein digestign enxyme functions in acidic medium?

Ans 1: Pepsin is a protein digesting enzyme whcih functions in acidic medium.

Question # 6

What do you mean by Optimum pH.

Ans 1: Optimum pH is a measure of how acidic or basic a substance or solution is . It is neasured on pH scale of 0 to 14 with 7 being nautral.
Enzymes show maximum aactivity at a specific pH. called their optimum pH

Question # 7

How does pH affect enzyme activity.

Ans 1: Enzymes are sensitive to hydrogen ion concentration of he fuid in which they work. They show maximum acticity at a speecific pH. called their optimum pH.

Question # 8

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 # 9

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 # 10

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.

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

Question # 1

Write affect of change of pH

Ans 1: Change in pH can affect the ionization of the amino acids t the active site down enzyme activity o blocks it comletely. Differente enzymes have differente optimum pH values. For example, Pepsin works in acidic medium while trypsin works in alkaline medium.

Question # 2

How does pH affect enzyme activity.

Ans 1: Enzymes are sensitive to hydrogen ion concentration of he fuid in which they work. They show maximum acticity at a speecific pH. called their optimum pH.

Question # 3

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

Ans 1: Only a small portion of enzyme molecule is directly involved in catalysis. This catalytic region is known as active site. It recognizes and binds substrates and then carries out biochemical reactions.

Question # 4

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

Ans 1: Each enzyme is specific to a chemicla reaction as it contains an active site which is the area of an enzyme that has specific shape which differs from one enxyme to another.

Question # 5

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 # 6

Which protein digestign enxyme functions in acidic medium?

Ans 1: Pepsin is a protein digesting enzyme whcih functions in acidic medium.

Question # 7

Difference between competitive and non competitive inhibition.

Ans 1: Competitive Inhibition:Some inhibitiors resemble the enxyme's substrate They compete with the substrate to attach to the active site of enxyme. Whe the inhibitor is attached to the active site. It blocks it and oes not allow the substrate to attach.Example:Examples of competitive inhibitors are antibioties. The antibiotic molecules compete with the substrates of bacterial enzymes. They attach to bacterial enzymes and inhibit them.
Ans 2: Non-Competivive inhibition : Some enxyme inhibitio do not have similarity to the substrate. They do not attach to the active site of enxyme. Rather they attach to some other location of enzyme. This attachement change sthe overall shape of enzyme and active site. so, this changed activ esite does not fit substrate and enxyme is inhibited Example: Heavy mtals like ercury and certain drugs used in cancer therapy.

Question # 8

Describe lock and key model of enzyme action.

Ans 1: Emil Fischer proposed the lock and key model of enzyme action. The active site has particulr rigid shape into which the specific substrate fits exacely. The substrate is imagined being like a key whose shape is complementary to the enzyme or lock. Once the product is formed no longer fits into the active site nand escapes into the surrounding medium. The active site is free to combine again with another substrate molecule.

Question # 9

What do you mean by Optimum Temperature

Ans 1: Optimum temperature:
Each enzyme works at maximum rate at a specific temperture calle doptimum temperature. The optimum temperature for most of human enzyme in 37 oC

Question # 10

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.

Submit

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9th Biology Urdu Medium Chapter 7 Preperation

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9th Class English Medium Subjects

9th Class Urdu Medium Subjects

Online Short Questions For Chapter 7 "9th Class Biology Urdu Medium Chapter 7 Preparation "

Biology (New Book) - 9th Class Biology Urdu Medium Chapter 7 Preparation

Name the factors affecting enzyme activity.

Difference between competitive and non competitive inhibition.

Define Metabolism. Difference between catabolism and anabolism.

Difference between Intractellular and extracellular enzymes.

Which protein digestign enxyme functions in acidic medium?

What do you mean by Optimum pH.

How does pH affect enzyme activity.

Provide an example of a specific enzyme substrate pair.

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

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

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

Name the factors affecting enzyme activity.

Difference between competitive and non competitive inhibition.

Define Metabolism. Difference between catabolism and anabolism.

Difference between Intractellular and extracellular enzymes.

Which protein digestign enxyme functions in acidic medium?

What do you mean by Optimum pH.

How does pH affect enzyme activity.

Provide an example of a specific enzyme substrate pair.

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

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

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

Write affect of change of pH

How does pH affect enzyme activity.

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

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

Difference between Catalyst and enzyme.

Which protein digestign enxyme functions in acidic medium?

Difference between competitive and non competitive inhibition.

Describe lock and key model of enzyme action.

What do you mean by Optimum Temperature

Provide an example of a specific enzyme substrate pair.

9th Biology Urdu Medium Chapter 7 Preperation

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