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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.
MCQ's Test For Chapter 7 "Enzymes"
Try The MCQ's Test For Chapter 7 "Enzymes"
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Total Questions12
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Time Allowed15
Enzymes
00:00
Question # 1
Changes in pH can alter the active site by affecting the
Question # 2
What is true about the optimun pH values of the followign enzyes of digestive system.
Question # 3
Lock and key hypothesis of enzyme action supports that
Question # 4
The biochemical reactions in which larger molecules are broken down are called
Question # 5
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 # 6
Enzyme pepsin in the stomach has an optimum pH of about
Question # 7
What is TRUE . according to the induced fit model of enzyme action.
Question # 8
Enzymes convert the substrate into different molecules called.
Question # 9
The active site of an enzyme
Question # 10
Pepsin enzyme works in.
Question # 11
Enzyme are specific in their action becasue.
Question # 12
How does competitive inhibitor affect enzyme action
MCQs Test of 9 th Class Biology Chapter 7
These MCQs tests along with answers can also be downloaded in pdf files for offline preparation. You can attempt these important tests anytime and anywhere on any device. These important online tests are provided to the students without any charges. 9 th class biology chapter 7 MCQs with answers is carefully prepared by our experienced staff. If you practice these tests then you can successfully attempt your board exam. The correct answers of all MCQs are given in the end of test. You can download 9 th class biology chapter 7 MCQs pdf and can save them. This online session is perfect for the preparation of 9 th class biology chapter 7. For the students of 9 th class, past papers and guess papers are also given on ilmkidunya. Make sure your better preparation by this important MCQs tests.
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.
Top Scorers Of Chapter 7 "Enzymes" MCQ`s Test
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9th Class (English Medium) Biology (New Book) Chapter 7 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Lock and key hypothesis of enzyme action supports that |
A. Active sites are rigid
B. Active sites are flexible
C. Active site efficiency increases
D. Active site can change its shape
|
| 2 | What is true about cofactors. |
A. Help facilitate enzymes activity
B. Are composed of proteins
C. Break hydrogen bond in proteins
D. Increase activation energy
|
| 3 | 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
|
| 4 | Primarily, all enzymes are. |
A. Proteins
B. Nucleic acids
C. Carbohydrates
D. Lipids
|
| 5 | ionization of amino acids at the activ esite is affected by. |
A. Change in pH
B. Change in temperature
C. Change in substrate conceration
D. Change is tempeaure and substrate concentration
|
| 6 | Pepsin enzyme works in. |
A. Large intestine
B. Small intstine
C. Stomach
D. Heart
|
| 7 | What can happen if an enzyme is exposed to temperature that is highr than its optimal temperature. |
A. Enzyme activity rate will increase
B. Enzyme's shape will change potentially reducing its activity
C. Enzyme will speed up the reaction and remain stable
D. Enzyme will become a substrate itself
|
| 8 | What is true about the optimun pH values of the followign enzyes of digestive system. |
A. Both work at high pH
B. Both work at low pH
C. Pepsin works at low pH while trypsin works at high pH
D. Pepsin works at high pH while trypsin works at low pH
|
| 9 | 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
|
| 10 | How does increasing temperatue affect enzyme activity. |
A. Increase actiity to a point
B. Always decreases activity
C. Makes enzymes non functional
D. No effect on enzyme
|
Test Questions
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Guest User
11 Dec 2019Q uestion test kese dete hai
muhammad uzair
08 Dec 2017it is good
ujala
14 Sep 2017good
ujala
08 Sep 2017its a good.it is to helpful for exams preparation