Part 7: Cancer, HIV & AIDS (25 MCQs)
Part 7: Cancer, HIV & AIDS (25 MCQs)
Q151. Cancer is best described as:
a) Normal cell growth
b) Controlled cell division
c) Uncontrolled cell division forming tumors
d) Programmed cell death
Answer: c
- c) Correct: Cancer = uncontrolled cell division → tumor formation.
Q152. Tumors that do not spread to other body parts are called:
a) Malignant tumors
b) Benign tumors
c) Secondary tumors
d) Infectious tumors
Answer: b
- b) Correct: Benign = localized, non-invasive; malignant spreads (metastasis).
Q153. Malignant tumors spread through:
a) Blood and lymph
b) Saliva
c) Fecal contamination
d) Vaccines
Answer: a
- a) Correct: Metastasis = cancer cells spreading via blood/lymph.
Q154. Carcinogens are agents that:
a) Kill bacteria
b) Induce cancer by causing mutations
c) Neutralize antibodies
d) Prevent metastasis
Answer: b
- b) Correct: Carcinogens (chemicals, radiation, viruses) → DNA mutations → cancer.
Q155. Which virus is associated with cervical cancer?
a) HIV
b) Hepatitis B virus
c) Human Papilloma Virus (HPV)
d) EBV
Answer: c
- c) Correct: HPV infection → cervical cancer.
Q156. Which virus is linked to liver cancer?
a) HIV
b) Hepatitis B virus
c) Rhinovirus
d) Influenza virus
Answer: b
- b) Correct: Hepatitis B & C viruses → hepatocellular carcinoma.
Q157. Which gene normally prevents cancer by inhibiting cell division?
a) Oncogene
b) Tumor suppressor gene
c) Proto-oncogene
d) Mitochondrial gene
Answer: b
- b) Correct: Tumor suppressor genes (e.g., p53) stop uncontrolled growth.
Q158. Oncogenes are:
a) Normal genes
b) Mutated proto-oncogenes that cause cancer
c) Tumor suppressor genes
d) Ribosomal genes
Answer: b
- b) Correct: Oncogenes = mutated proto-oncogenes that stimulate cancerous growth.
Q159. Which diagnostic method is used for early cancer detection?
a) Blood test for enzymes and antigens
b) Imaging (MRI, CT, PET)
c) Biopsy
d) All of the above
Answer: d
- d) Correct: Cancer diagnosis uses biopsy + imaging + blood markers.
Q160. Which treatment is NOT typically used for cancer?
a) Chemotherapy
b) Radiation therapy
c) Immunotherapy
d) Antibiotic therapy
Answer: d
- d) Correct: Antibiotics don’t cure cancer.
Q161. HIV primarily infects which cells?
a) B-cells
b) Cytotoxic T-cells
c) Helper T-cells (CD4+)
d) Neutrophils
Answer: c
- c) Correct: HIV infects CD4+ helper T-cells → immune deficiency.
Q162. The full form of AIDS is:
a) Acquired Immunodeficiency Syndrome
b) Acute Infectious Disease Syndrome
c) Auto-Immune Deficiency Syndrome
d) Acquired Immunological Disease Syndrome
Answer: a
- a) Correct: AIDS = Acquired Immunodeficiency Syndrome.
Q163. The enzyme used by HIV to make DNA from RNA is:
a) DNA polymerase
b) Reverse transcriptase
c) RNA polymerase
d) Ligase
Answer: b
- b) Correct: HIV uses reverse transcriptase to form DNA from RNA.
Q164. HIV infection leads to decline in:
a) RBC count
b) Helper T-cell count
c) Plasma cell count
d) Neutrophil count
Answer: b
- b) Correct: HIV destroys CD4+ T-cells, weakening immunity.
Q165. Major symptoms of AIDS include:
a) Persistent fever, weight loss, diarrhea, opportunistic infections
b) Skin lesions only
c) Pneumonia only
d) Fever with jaundice only
Answer: a
- a) Correct: AIDS = multiple opportunistic infections, weight loss, prolonged fever.
Q166. Opportunistic infections in AIDS patients include:
a) Tuberculosis
b) Pneumonia
c) Candidiasis
d) All of the above
Answer: d
- d) Correct: AIDS patients suffer from TB, fungal, bacterial, and viral infections.
Q167. HIV is transmitted by:
a) Sharing needles
b) Sexual contact
c) Blood transfusion
d) From infected mother to child
e) All of the above
Answer: e
- e) Correct: HIV spreads by blood, sex, needles, mother-to-child.
Q168. Which is NOT a mode of HIV transmission?
a) Unprotected sex
b) Breastfeeding
c) Mosquito bites
d) Infected blood transfusion
Answer: c
- c) Correct: HIV is not spread by mosquitoes.
Q169. Which test is commonly used for HIV diagnosis?
a) ELISA
b) Widal test
c) PCR only
d) Blood sugar test
Answer: a
- a) Correct: ELISA detects HIV antibodies → screening test.
Q170. Confirmatory test for HIV infection is:
a) ELISA
b) Western blot test
c) Widal test
d) MRI
Answer: b
- b) Correct: Western blot confirms HIV infection after ELISA.
Q171. Which drug is used to manage HIV infection?
a) Antivirals (AZT, Zidovudine)
b) Antibiotics
c) Antifungals
d) Antihistamines
Answer: a
- a) Correct: AZT (zidovudine) inhibits reverse transcriptase → HIV treatment.
Q172. Which is the main reason AIDS patients often die?
a) High fever
b) Opportunistic infections due to weak immunity
c) Genetic mutation
d) Severe allergy
Answer: b
- b) Correct: Death in AIDS is due to secondary infections, not HIV directly.
Q173. HIV belongs to which group of viruses?
a) Retroviruses
b) Adenoviruses
c) DNA viruses
d) Rhabdoviruses
Answer: a
- a) Correct: HIV = retrovirus with RNA genome.
Q174. Which global day is observed for AIDS awareness?
a) March 24
b) December 1
c) July 11
d) April 7
Answer: b
- b) Correct: December 1 = World AIDS Day.
Q175. The NACO (National AIDS Control Organisation) in India was established in:
a) 1970
b) 1987
c) 1992
d) 2000
Answer: c
- c) Correct: NACO was established in 1992 to control HIV/AIDS in India.
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