Match the disease given in Column I with the principal causal organism in Column II and choose the correct combination. Column I Column II P AIDS i HBV Q Syphilis i i Neisseria sp. R Viral hepatitis i i i Treponema sp. ( S ) Gonorrhoea i v HIV

P - i v , Q - i i i , R - i , S - i i

P - i v , Q - i i , R - i , S - i i i

P - i , Q - i i , R - i v , S - i i i

P - i , Q - i i , R - i i , S - i i i

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Important Questions on Human Health and Diseases

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

HIV that causes AIDS, first starts destroying:

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

HIV decreases natural immunity of the body by destroying

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Explain the mechanism by which HIV multiplies and leads to AIDS.

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Which of the following is correct regarding AIDS causative agent HIV?

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Identify the incorrect statements.

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Which of the following statements are not true for cancer cells in relation to mutations?

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Explain the mechanism by which HIV multiplies and leads to AIDS.

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Which one of the following properties of normal cell is lost during its transition to cancerous cell?

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Identify the enzyme that catalyses the step labelled as ' $M$ ' in the given schematic representation of replication of retrovirus.

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Write a note on control and preventive measuresAIDS

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Match the disease given in Column I with the principal causal organism in Column II and choose the correct combination.

Column I	Column II
$(P)$ $AIDS$	$(i)$ $HBV$
$(Q)$ Syphilis	$(i i)$ Neisseria sp.
$(R)$ Viral hepatitis	$(i i i)$ Treponema sp.
$(S)$ Gonorrhoea	$(i v)$ $HIV$

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

At which stage of HIV infection does one usually show symptoms of AIDS?

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Enzyme

X

catalyzes hydrolysis of GTP into GDP. The GTP-bound form of

X

transmits a signal that leads to cell proliferation. The GDP-bound form does not transmit any such signal. Mutations in

X

are found in many cancers. Which of the following alterations of

X

are most likely to contribute to cancer?

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

In which blood corpuscles, the HIV undergoes replication and produces progeny viruses?

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Study the following statements.
I) Cancer of connective tissues is called carcinoma.
II) $α$ -lactalbumin is used to treat emphysema.
III) Chromium is carcinogenic.
IV) Sporadic cancers are non-hereditary.

Correct statements of the above is:

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Which is the most feared property of malignant tumors?

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

Identify the techniques useful in detecting the cancers of internal organs.

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS

List down the symptoms of AIDS as defined by WHO.

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Biology>Biology in Human Welfare>Human Health and Diseases>Cancer and AIDS