Class XII · Biology practice

Human Health and Disease MCQs

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446 questions in this collection · Page 25 of 45

Question 241 of 446

📘 CLASS XII

Human Health And Disease

The progressive decrease in the number of ____ T-lymphocytes leads to immunodeficiency in an AIDS patient.

The progeny viruses attack other helper T-lymphocytes, leading to a progressive decrease in their number.

Question 242 of 446

📘 CLASS XII

Human Health And Disease

The widely used diagnostic test for AIDS is ____.

ELISA (Enzyme Linked Immuno-Sorbent Assay) is the widely used diagnostic test for AIDS.

Question 243 of 446

📘 CLASS XII

Human Health And Disease

In India, the ____ (NACO) and other NGOs educate people about AIDS.

The National AIDS Control Organisation (NACO) works extensively to educate people about AIDS.

Question 244 of 446

📘 CLASS XII

Human Health And Disease

Normal cells show a property called ____ by virtue of which contact with other cells inhibits their uncontrolled growth.

Normal cells show a property called contact inhibition, which is lost in cancer cells.

Question 245 of 446

📘 CLASS XII

Human Health And Disease

____ tumors normally remain confined to their original location and do not spread.

Benign tumors normally remain confined to their original location and do not spread.

Question 246 of 446

📘 CLASS XII

Human Health And Disease

The most feared property of malignant tumors, where cells spread to distant sites through blood, is called ____.

The property of cancer cells spreading to distant sites is called metastasis.

Question 247 of 446

📘 CLASS XII

Human Health And Disease

Physical, chemical, or biological agents that induce neoplastic transformation are called ____.

Agents that induce transformation are called carcinogens.

Question 248 of 446

📘 CLASS XII

Human Health And Disease

Ionising radiations like X-rays and ____ rays cause DNA damage leading to neoplastic transformation.

Ionising radiations like X-rays and gamma rays cause DNA damage.

Question 249 of 446

📘 CLASS XII

Human Health And Disease

Cancer detection is based on biopsy and ____ studies of the tissue.

Cancer detection is based on biopsy and histopathological studies of the tissue.

Question 250 of 446

📘 CLASS XII

Human Health And Disease

____ uses X-rays to generate a three-dimensional image of the internals of an object.

Computed Tomography (CT) uses X-rays to generate a three-dimensional image.

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