Skip to content
Symmetric Angles
Practice & Quizzes
Close Practice & Quizzes
Open Practice & Quizzes
Class 9
- Science
- Mathematics
Class 10
- Science
- Mathematics
Class 11
- Physics
- Mathematics
Class 12
- Physics
- Mathematics
Search
Search
₹
0.00
0
Cart
SIGN IN
SIGN UP
You need to log in to see your display name.
You need to log in to see your email.
My progress
Settings
Orders
Log out
Sign in
Class 9 Practice Level 3 – Why do we fall ill set – 2
Total questions: 29
1.
How do prions differ from other infectious agents?
They are visible under a light microscope.
They have both DNA and RNA.
They contain no genetic material.
They replicate outside a host cell.
None
2.
Which type of immunity involves the transfer of antibodies from one individual to another?
Active immunity
Innate immunity
Adaptive immunity
Passive immunity
None
3.
Which mechanism allows bacteria to become resistant to multiple antibiotics?
Horizontal gene transfer
Spontaneous mutation
Reduced permeability to antibiotics
Efflux pumps
None
4.
Why is it challenging to develop a vaccine for HIV/AIDS?
HIV mutates rapidly.
HIV is not contagious.
HIV does not stimulate an immune response.
HIV only affects animals.
None
5.
How does hypertension contribute to the development of cardiovascular diseases?
By increasing oxygen levels in the blood
By reducing blood flow to the brain
By causing damage to blood vessels
By lowering cholesterol levels
None
6.
What is the primary reason for the resurgence of vector-borne diseases in certain areas?
Overuse of vaccines
Increased use of antibiotics
Environmental changes and urbanization
Improved sanitation
None
7.
What is the role of cytotoxic T cells in the immune system?
To produce antibodies
To phagocytize pathogens
To destroy infected host cells
To activate B cells
None
8.
Which autoimmune disease is characterized by chronic inflammation of the joints?
Multiple sclerosis
Rheumatoid arthritis
Type 1 diabetes
Lupus
None
9.
Which deficiency is linked to impaired cognitive development in children?
Vitamin C
Iodine
Vitamin D
Calcium
None
10.
How does indirect transmission of disease occur?
Through direct contact with an infected individual
Through vectors such as mosquitoes
Through airborne droplets
Through contaminated surfaces or objects
None
11.
What is the purpose of booster shots in vaccination programs?
To treat existing infections
To provide lifelong immunity
To enhance and prolong the immune response
To increase the dosage of the vaccine
None
12.
What is the significance of calculating the basic reproduction number (R0) of a disease?
To determine the severity of symptoms
To measure the average number of secondary infections produced by one infected individual
To estimate the cost of treatment
To identify the mode of transmission
None
13.
How does chronic inflammation lead to cancer?
By increasing antibody production
By causing frequent infections
By inducing DNA damage and promoting cell proliferation
By strengthening the immune system
None
14.
Which public health strategy is most effective in preventing the spread of a pandemic?
Reducing funding for healthcare
Encouraging mass gatherings
Implementing travel restrictions and social distancing
Ignoring health guidelines
None
15.
Which autoimmune disorder results in the demyelination of nerve cells?
Type 1 diabetes
Rheumatoid arthritis
Multiple sclerosis
Lupus
None
1 out of 15
Time's up
Scroll to Top
Search
Search
Practice and Quizzes
Class 9
Menu
Science
Mathematics
Class 10
Menu
Science
Mathematics
Class 11
Menu
Physics
Mathematics
Class 12
Menu
Physics
Mathematics
Membership
Hello!
Menu
My Progress
My membership
Orders
Addresses
Account details
Welcome back
Please enable JavaScript in your browser to complete this form.
Please enable JavaScript in your browser to complete this form.
Email
*
Password
*
Remember me
Remember me
Log in
Forgot Password?
Don't have an account?
Sign up
OR
Sign in with Google
Sign in with Facebook
Sign in with Google
Sign in with Facebook