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

Question # 1

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 # 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

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 # 4

Name the factors affecting enzyme activity.

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

Question # 5

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 # 6

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

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

Question # 7

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 # 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 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 # 10

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.

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

Matric Part 1/9th Class Biology Chapter 7 Short Questions Test With Answer for Chapter 7 (Bioenergetics)

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

Difference between competitive and non competitive inhibition.

Difference between Catalyst and enzyme.

What do you mean by Optimum pH.

Name the factors affecting enzyme activity.

Describe lock and key model of enzyme action.

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.

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

Difference between competitive and non competitive inhibition.

Difference between Catalyst and enzyme.

What do you mean by Optimum pH.

Name the factors affecting enzyme activity.

Describe lock and key model of enzyme action.

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.

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

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

Name the factors affecting enzyme activity.

Define an enzyme. What is its role in metabolism.

Difference between competitive and non competitive inhibition.

What do you mean by Optimum pH.

What do you mean by saturation of active sites.

What do you mean by Optimum Temperature

Define Metabolism. Difference between catabolism and anabolism.

Which protein digestign enxyme functions in acidic medium?

Difference between Intractellular and extracellular enzymes.

9th Biology Urdu Medium Chapter 7 Preperation

Is this page helpful?

Share your comments & questions here