Human Health and Diseases Chapter-Wise Test 14

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following is a preventive measure for AIDS?

Using disposable needles
Drinking boiled water
Wearing a mask
Taking antibiotics
1

AIDS is mainly transmitted through contaminated needles, sexual contact, and blood transfusions, so using disposable needles helps prevent infection.

Which chemical is released by virus-infected cells to protect nearby healthy cells?

Histamine
Interferon
Serotonin
Cytokinin
2

Interferons are proteins released by virus-infected cells to prevent viral replication in nearby cells.

Which disease is caused by the Epstein-Barr virus (EBV)?

Hepatitis
Infectious mononucleosis
Influenza
Rabies
2

Infectious mononucleosis, also known as the "kissing disease," is caused by the Epstein-Barr virus (EBV).

Which of the following statements about lymph is incorrect?

Lymph is a fluid that carries white blood cells.
Lymph contains red blood cells for oxygen transport.
Lymph helps in immune responses.
Lymph is transported through lymphatic vessels.
2

Lymph does not contain red blood cells; it carries white blood cells and helps in immune defense.

Which of the following statements about vaccines is incorrect?

Vaccines stimulate the immune system to create memory cells.
Vaccines provide immediate immunity.
Live-attenuated vaccines contain weakened pathogens.
Toxoid vaccines contain inactivated toxins.
2

Vaccines do not provide immediate immunity; they take time to generate an immune response and develop memory cells.

What is the function of interferons in the immune system?

Destroy bacteria
Protect cells from viral infections
Produce antibodies
Activate neutrophils
2

Interferons are proteins released by virus-infected cells that protect nearby uninfected cells from viral infections.

Which type of immunity is provided by a vaccine?

Innate immunity
Passive immunity
Active acquired immunity
Cell-mediated immunity
3

Vaccines stimulate the immune system to develop active acquired immunity by producing memory cells.

Which of the following is the most effective method to prevent the spread of Hepatitis B?

Avoiding cold food
Using disposable syringes
Drinking boiled water
Taking vitamin supplements
2

Hepatitis B is transmitted through contaminated blood, so using disposable syringes helps prevent its spread.

Which of the following is a characteristic feature of cancer cells?

Contact inhibition
Uncontrolled cell division
Apoptosis
Limited cell lifespan
2

Cancer cells lose the property of contact inhibition and undergo uncontrolled cell division, forming tumors.

Which preventive measure is most effective against air-borne diseases?

Using mosquito nets
Maintaining proper sanitation
Wearing masks and covering mouth while sneezing
Drinking clean water
3

Wearing masks and covering the mouth while sneezing help prevent the spread of air-borne diseases like pneumonia and common cold.

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