Biology Class 9 Chapter 6 MCQs
If you are looking for biology class 9 chapter 6 MCQs then you are right place because PAK MCQs provide you multiple choice questions of physics, chemistry, English, general knowledge, Islamiat, and biology MCQs. In this blog, you will get Biology class 9 MCQs and the chapter name is Enzymes this is a very important chapter for medical students. These biology class 9 chapter 6 Enzyme MCQs are very helpful for MDCAT, board exams, and other tests. So we are sharing the best multiple choice questions of enzyme with you these enzyme MCQs will you in every test you must first try to solve multiple choice questions yourself, and then you can see the correct answers this is best practice for study. These enzyme MCQs with answers I hope these solved MCQs of biology class 9 Sindh board new book multiple choice question will be helpful for your upcoming exams and entry test as well as other job exams.
Solved MCQs Of Biology Class 9 Sindh Board New Book
1 Most enzymes are made up of:
A. Protein
B. Carbohydrate
C. Lipids
D. None of these
Protein
2 The reactant called __________is attached to the active site of enzymes:
A. Substance
B. Particle
C. Substrate
D. Molecule
Substrate
3 The chemical reaction which occurs in living organisms is called:
A. Anabolisms
B. Metabolisms
C. Catabolism
D. All of them
All of them
4 Observe the below diagram and act accordingly:
A
5 Enzymes are biologically:
A. Inactive
B. Energetic
C. Active
D. Both A and B
Active
6 The formation of polymers or large molecules from monomers or small molecules is called:
A. Anabolisms
B. Catabolism
C. Metabolisms
D. Hydrolysis
Anabolisms
7 Lock and key model was given by:
A. Euler
B. Altman
C. Koshland
D. Fischer
Fischer
8 The amount of energy required to start a chemical reaction is called:
A. Chemical energy
B. Mechanical energy
C. Thermal energy
D. Activation energy
Activation energy
9 Inside the normal human body there is pressure about:
A. 120/80 mm
B. 120/70 mm
C. 100/80 mm
D. None
120/80 mm
10 Initially __ is required to break a single glucose molecule in living bodies:
A. 2 ATP
B. 12 ATP
C. 36 ATP
D. None of these
2 ATP
11 Induce fit model was proposed by:
A. Koshland
B. Euler
C. Altman
D. Fischer
Koshland
12 Find the right answer accordingly:
A
13 At low concentrations of substrate, the reaction rate is directly proportional to the available:
A. Enzyme
B. Reactant
C. Substrate
D. Product
Substrate
14 The activator of enzymes is/are:
I. Mg+ II. Fe+ III. Cu+ IV. K+ IV. Na+
A. I, II, III
B. I, III
C. II, III, IV, V
D. I, II, III, IV, V
I, II, III, IV, V
15 Enzymes mean:
A. Inside plants
B. Inside animals
C. Inside yeast
D. Inside algae
Inside yeast
16 By increasing the enzyme molecules there is an increase in the numbers of:
A. Active sites
B. Non catalytic sites
C. Both A&B
D. Inactive sites
Active sites
17 Which one in the following is a biocatalyst?
A. Glucose
B. Pepsin
C. Starch
D. Amino acid
Pepsin
Also Read: Biology Class 9 Chapter 3 Biodiversity
18 The optimum pH of the pepsin enzyme is:
A. 2
B. 3
C. 2.5
D. 7
2
19 Enzyme activity is affected by
I. Concentration of substrate II. Temperature III. pH
A. I, II
B. I, II, III
C. II only
D. II, III
I, II, III
20 The word enzyme means in __:
A. Bacteria
B. Yeast
C. Plants
D. None of these
Yeast
21 Enzymes works:
A. Inside the cells
B. Outside the cells
C. Both A&B
D. None
Both A&B
22 Look at the graph below:
At which point does the enzyme work with maximum efficiency?
A. Point A
B. Point B
C. Point C
D. Point D
Point C
23 Inhibitor __________the enzymatic activity:
A. Increase
B. Speed up
C. Decrease
D. None of these
Decrease
24 Protease enzymes act on:
A. Lipid
B. Carbohydrate
C. Protein
D. Nucleic acid
Protein
25 Which of the following is/are organic co-factors?
I. ATP II. NAD III. FAD IV. Zn V. Mg
A. I, II, III
B. I, IV, V
C. II, III, IV
D. I, II, III, V
I, II, III
26 Find the odd one in the following:
A. NADP
B. FAD
C. RNA
D. ATP
RNA
27 Enzymes work on its __________pH:
A. Acidic
B. Basic
C. Optimum
D. Neutral
Optimum
28 Enzymes are used in:
A. Paper industry
B. Food industry
C. Brewing and detergents industry
D. All of these
All of these
29 Optimum temperature for enzymes is:
A. 37 oF
B. 98.6 oF
C. 40 oC
D. 30 oC
98.6 oF
30 Active site is found only in:
A. Substrate
B. Enzymes
C. Molecule
D. All of these
Enzymes
31 Most enzymes work on __ pH:
A. 7.4
B. 5
C. 2
D. 14
7.4
32 According to the Induce fit model the active site of enzymes continuously changes its shape until ____ is
bind to it:
A. Molecules
B. Atoms
C. Substrate
D. None of these
Substrate
33 In the human body there are about __ known enzymes:
A. 100
B. 500
C. 1000
D. 10000
1000
34 Which of the following natures are found in enzymes:
A. Acidic
B. Basic
C. Neutral
D. All of these
All of these
35 Lipase enzymes act on:
A. Protein
B. Fats
C. Nucleic acid
D. Carbohydrate