Cancer

Q. Which one of the following is not a property of cancerous cells?

1. They show contact inhibition
2. They divide uncontrollably
3. They compete with normal cells
4. They do not remain confined to the area of origin

Q.

What Is metastasis?

Q. Cancer occurs when

1. when meiosis is prolonged
2. when mitosis is prolonged
3. when the cell cycle regulation is defective
4. DNA decides that it is time for a cell to become cancerous

Q.

If you live in an overcrowded and poorly ventilated house, it is possible that you may suffer from which of the following diseases

1. cancer

2. AIDS

3. air borne diseases

4. cholera

Q. Carcinoma refers to :

1. Malignant tumors of the connective tissue
2. Malignant tumors of the skin or mucous membrane
3. Malignant tumors of the colon
4. Benign tumours of the connective tissue

Q. Which of the following statements is not true for cancer cells in relation to mutations?

1. Mutations in proto – oncogenes accelerate the cell cycle
2. Mutations destroy telomerase inhibitor
3. Mutations inactivate the cell control
4. Mutations inhibit production of telomerase

Q. Gene X is subjected to UV radiation and it gets converted to Y. X was not harmful earlier but gets activated to form Y and now causes cancer. What are X and Y respectively?

1. Oncogene, proto oncogene
2. Suppressor, tumor suppressor
3. Proto oncogene, oncogene
4. Tumor suppressor, suppressor

Q. The conversion of normal body cell into an abnormal cell is termed as

1. Cancer
2. Differentiation
3. Morphogenesis
4. All of the above

Q. Find out the incorrect statement(s).

I. Polyp is sessile and cylindrical like Adamsia

II. Medusa is umbrella shaped and free-swimming like Aurelia

III. Polyps produce medusae sexually and medusae form the polyps asexually

IV. Medusae produce polyps sexually

1. I and IV
2. Only I
   
3. II and III
4. Only III

Q. Tumors in the human body are always malignant in nature.

1. True
2. False

Q. World AIDS day is on:

1. 25th April
2. 20th August
3. 4th February
4. 1st December

Q. At which stage of HIV infection does one usually show symptoms of AIDS? (AIPMT 2014)

1. When HIV damages a large number of helper T - lymphocytes.
2. When the viral DNA is produced by reverse transcriptase.
3. When the infected retrovirus enters host cells.
4. Within 15 days of sexual contact with an infected person.