Virus-infected cells secrete proteins called interferon which protect non-infected cells from further viral infection. This comes under

1 Physical barrier

2 Physiological barrier

3 Cellular barrier

4 Cytokine barrier

Mark the correct statement

a. MALT (Mucosa-associated lymphoid tissue) constitutes about 50% of the lymphoid tissue in the human body

b. Antigen trapped in the lymph nodes are responsible for the activation of lymphocytes present there and cause an immune response

c. B cells mediate (CMI), cell-mediated immunity

d. Secondary immune response is due to memory cells

1 a & b are correct

2 c & d are correct

3 a, b & d are correct

4 a, b, c & d are correct

The yellowish fluid colostrum secreted by mother during the initial days of lactation has abundant antibodies which provides infant with

1. Naturally acquired active immunity

2. Artificially acquired active immunity

3. Naturally acquired passive immunity

4. Artificially acquired passive immunity

Cancer cells show the following feature(s) except

1. Metastasis

2. Apoptosis

3. Contact inhibition

4. Both 2 & 3

Mark the correct statement

1 MALT constitutes less than 25 percent of the Lymphoid tissue in the human body

2 In case of snake bites, the injection which is given to the victim contains preformed antibodies against the snake venom

3 Autoimmune diseases like insulin-dependent diabetes, Addison's disease, ulcerative colitis and rheumatoid can be treated by immuno potentiation therapy

4 Passive immunity provides relief only after long period and is long-lasting

The sporozoites that cause infection when a female Anopheles mosquito bites a human being are found in

1 Hepatocytes of human

2 RBCs of mosquito

3 RBCs of man

4 Salivary glands of infected mosquito

Given below are pairs of pathogens, diseases caused by them and their classification. Which of these is incorrectly matched?

Disease  - Pathogen - Causative agent

1. Pneumonia  - Haemophilus influenzae - Bacteria

2. Typhoid - Salmonella - Bacteria

3. Filariasis - Microsporum - Roundworm

4. Chikungunya - Virus - Virus

Which of the following diseases is related with the statement "Don't die of ignorance"?

1 Cancer

2 AIDS

3 Hepatitis

4 Gonorrhoea

Foetus receive some antibodies from the mother through placenta during pregnancy. This is an example of

1 Naturally acquired active immunity

2 Artificially acquired passive immunity

3 Naturally acquired passive immunity

4 Artificially acquired active immunity

Which of the following statements is incorrect with respect to malaria?

1 Malaria is a disease caused by a protozoan

2 Malignant malaria is caused by Plasmodium falciparum

3 Parasites enter the mosquito's body and multiply to form sporozoites that are stored in stomach of mosquito

4 Malaria parasites initially multiply within the liver cells in humans