9th Class Biology Chapter 7 English Medium Online MCQ Test With Answer
All the students of class 9th are invited here. We are providing the 9th class biology ch7 MCQs solved on our website. You can get the benefit from these MCQs by downloading the pdf file, which is available on this page. It enables you to practice a large number of questions in a relatively short period of time; practicing MCQs through a PDF might be a helpful way to get ready for tests. MCQs are a helpful way to assess how well you understand a subject. Additionally, we are not only providing the MCQs of Biology but also the past papers, 9th class video lectures, and many other resources on our website.
Which of the followig are not changed during the biochemical reactions.
Question # 2
Enzymes convert the substrate into different molecules called.
Question # 3
Prosthetic groups are.
Question # 4
Whcih does yield energy.
Question # 5
Set of biochemical reactions that occur in living organisms in order to maintain life is called.
Question # 6
An enzyme works best at a pH of 7.4. It is places in an acidic solution with a pH of 4.0.How will this affect the enzyme.
Question # 7
The biochemical reactions in which larger molecules are synthesized are called.
Question # 8
If you add more substrate to already occurrig enzymatic reaction and it has no effet on the rate of reaction. What is the form given to this situation.
Question # 9
Enzyme are specific in their action becasue.
Question # 10
What is true about cofactors.
Question # 11
The catalytic region on enzyme recognizes and binds the substrate and carries the reaction. This region is called as.
Question # 12
Changes in pH can alter the active site by affecting the
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MCQs of Chapter 7, ENZYMES
The Biology 9th class Chapter 7 MCQs are prepared to help students understand the key concepts of “Enzymes.” This chapter explains what enzymes are, how they work as biological catalysts, and their role in speeding up chemical reactions in living organisms. By practicing these MCQs, students can strengthen their knowledge about enzyme action, factors affecting enzyme activity, and the importance of enzymes in different biological processes. These MCQs will make exam preparation easier and give a better grip on the objective part of the paper.
How to Practice the MCQs Online?
Students of class 9th can practice by solving the Chapter 7 biology 9th class important MCQs that are mentioned on this page. As you know, Multiple Choice Questions (MCQs) play a vital role in exams, and you have to solve all of them. So, from our website, you can appear in the online test session. After submitting the test, you will be able to get the final result of the MCQs. There will be a total of 12 MCQs that you have to solve in 15 minutes. These MCQs will surely help you in your tests or exams.
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Kanwal Jameel05 - Jan - 2025
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M. Abdullah24 - Dec - 2025
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01 Min 31 Sec
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Saba Manzoor02 - Sep - 2025
01 Min 44 Sec
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9th Class (English Medium)
Biology (New Book)
Chapter 7
Important MCQ's
Sr.#
Question
Answer
1
Prosthetic groups are.
A. Required by all enzymes
B. Protins in nature
C. Tightly bound to enzyme
D. Loosely attached with enzymes
2
Whcih does consume energy
A. Catabolism
B. Metabolism
C. Anabolism
D. Both a and b
3
How does competitive inhibitor affect enzyme action
A. attaches with the substrate
B. Changes enzyme shape
C. Attaches and blocks the active site
D. Blocks the cofactors
4
Primarily, all enzymes are.
A. Proteins
B. Nucleic acids
C. Carbohydrates
D. Lipids
5
An enzyme works best at a pH of 7.4. It is places in an acidic solution with a pH of 4.0.How will this affect the enzyme.
A. The substrate will become inactive in an acidic environment
B. the enzyme wil gain additional active sites
C. The enzyme will catalyse reactions faster due to increased H ions
D. The activ esite will be modified reducing substrate binding
6
If you add more substrate to already occurrig enzymatic reaction and it has no effet on the rate of reaction. What is the form given to this situation.
A. Denaturation
B. Saturation
C. Desaturation
D. Inhibition
7
In the presence of enzymes, reactions proceed at a.
A. Slower rate
B. Faster rate
C. Very slow rate
D. Medium rate
8
Which best defines an enzyme.
A. A chemical that breaks down food
B. A hormone that regulates metabolism
C. A protein that speeds up reactions
D. A molecule that stores energy
9
Set of biochemical reactions that occur in living organisms in order to maintain life is called.
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