NEET Biology Aids Multiple Choice Question And Answers

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Aids NEET Biology Mcqs

Question 1. AIDS stands for

  1. Acquired Immuno Deficiency Syndrome
  2. Acquired Immuno-Deficiency Sign
  3. Acquired Immuno-Deficiency System
  4. Acquired Immuno-Deficiency Structure

Answer: 1. Acquired Immuno Deficiency Syndrome

Question 2. AIDS was first reported in

  1. Russia
  2. France
  3. USA
  4. Germany

Answer: 3. USA

AIDS was first recognised in Haiti (USA) in 1981.

” hiv parasitizes”

Question 3. AIDS is a

  1. Cancer
  2. Virus borne disease
  3. Bacterial disease
  4. Deficiency disease

Answer: 2. Virus-borne disease

Read And Learn More: NEET Biology Multiple Choice Question And Answers

AIDS is caused by HIV virus. AIDS virus infects T4 lymphocytes in human body.

Question 4. Who discovered HIV, the causative agent of AIDS?

  1. Luc Montagnier
  2. WM Stanley
  3. Stanley Prusiner
  4. Lwoff and Guman

Answer: 1. Luc Montagnier

  • Dr Luc Montagnier was the head of the Viral Oncology Unit at the Pasteur Institute in Paris.
  • He discovered the human retrovirus, later to be known as HIV-1, the etiologic agent of AIDS in 1985.
  • His team isolated the second human AIDS virus, HIV-2, from West African patients.

NEET Biology Mcqs

NEET Biology Aids Multiple Choice Question And Answers

NEET Biology AIDS MCQs with Answers

Question 5. World AIDS Day is observed on

  1. May 1
  2. December 1
  3. December 20
  4. June 1

Answer: 2. December 1

World AIDS Day is observed on 1st December each year. It is an opportunity for people worldwide to unite in the fight against HIV, to show support for people living with HIV, and to commemorate those who have died from an AIDS-related illness.

“the first ever instance of aids was reported in 42 “

Question 6. HIV is a member of a group of viruses called

  1. Bacteriophages
  2. Geminiviruses
  3. Lysogenic viruses
  4. Retroviruses

Answer: 4. Retroviruses

  • Retrovirus is an RNA-containing virus that converts its RNA into DNA by means of the enzyme reverse transcriptase.
  • This enables it to become integrated into its host’s DNA. The best-known retrovirus is HIV, responsible for AIDS in humans.

Question 7. Select the correct statement.

  1. Two strains of HIV, viz HIV-1 and HIV-2 exist
  2. HIV have originated from non-human primates in West-Central Africa
  3. HIV-1 is more pathogenic and prevalent than HIV-2
  4. All of the above

Answer: 4. All of the above

All the given statements are correct.

Important MCQs on AIDS for NEET Biology

Question 8. HIV, responsible for AIDS in humans is a

  1. ssDNA virus
  2. dsDNA virus
  3. ssRNA virus
  4. dsRNA virus

Answer: 3. ssRNA virus

  • HIV (Human Immunodeficiency Virus) is a member of a group of viruses called retrovirus which have an envelope enclosing RNA genome.
  • It includes two single-stranded RNA (ssRNA) filaments.

Question 9. HIV exists in 2 forms. They are

  1. HIV-1 and HIV-2
  2. HIV-3 and HIV-4
  3. HIV-1 and HIV-2
  4. HIV-n and HIV-m

Answer: 1. HIV-1 and HIV-2

HIV has two strains, i.e. HIV-1 and HIV-2. HIV-3 is less easily transmitted. HIV-1 is predominant worldwide. HIV-1 has three groups, i.e. M, O and N.

Question 10. HIV belongs to the subfamily

  1. Lentivirus
  2. Hexponivirinae
  3. Adenoviridae
  4. Flavivirus

Answer: 1. Lentivirus

“hiv is thought to have originated from “

HIV belongs to the subfamily– Lentivirus. The core of the Lentivirus contains two single strands of RNA molecules, proteins and the enzyme, reverse transcriptase.

Question 11. The human immunodeficiency virus causes

  1. Depleting cd4 /t-helper lymphocytes
  2. Increasing cd/t-helper lymphocytes
  3. Depleting cds/t-helper lymphocytes
  4. Depleting cd/t-helper erythrocytes

Answer: 1. Depleting cd4 /t-helper lymphocytes

  • HIV infects vital cells in the human immune system such as T helper cells (specifically CD 4/ T-cells), macrophages and dendritic cells.
  • HIV infection leads to low levels of CD 4/ T cells through three main mechanisms
  • Direct viral killing of infected cells,
  • Increased rates of apoptosis in infected cells
  • Killing of infected cd 4/ t cells by
  • CDs cytotoxic lymphocytes that recognise infected cells. When CD 4/ T-cell numbers decline below a critical level, cell-mediated immunity is lost and the body becomes progressively more susceptible to opportunistic infections.

NEET Previous Year Questions on AIDS with Solutions

Question 12. In AIDS, the system which show failure is

  1. Digestive system
  2. Respiratory system
  3. Defence system
  4. Sensory system

Answer: 3. Defence system

An HIV infection damages the immune system, i.e. our body’s defence system that fight against diseases and infections.

Question 13. AIDS Related Complex (ARC) is a disease which leads to fever, swollen lymph nodes, night sweats, loss in weight, etc., and represents

  1. Severe form of aids
  2. Initial form of aids
  3. No link with aids
  4. None of the above

Answer: 2. Initial form of aids

AIDS-Related Complex (ARC), is a ‘prodromal or initial phase of infection with the Human Immunodeficiency Virus (HIV)’ that includes low grade fever, unexplained weight loss, diarrhoea, opportunistic infections and generalised lymphadenopathy.

NEET Biology Mcqs

Question 14. How does AIDS virus enter into man?

  1. Through food
  2. Through kissing
  3. Through water
  4. Through blood

Answer: 4. Through blood

AIDS can be transmitted by sharing of injection needles, surgical instruments with infected persons, transfusion of blood, etc.

Question 15. AIDS causing factors are associated with

  1. RNA virus
  2. DNA virus
  3. Bacteria
  4. Protozoa

Answer: 1. RNA virus

AIDS is caused by HIV virus. Its genome consists of a single-stranded RNA filament segmented into two identical filaments and associated with a ‘reverse transcriptase enzyme’.

how many stages of hiv infection exist

Question 16. In context of AIDS, how many statements are true?

  1. It is a viral disease.
  2. It is sexually transmitted disease.
  3. It can be transmitted through blood transfusion.
  4. It can be transmitted by shaking hand and sharing food.

 

  1. 1
  2. 2
  3. 3
  4. 4

Answer: 3. 3

  • Three statements, 1, 2, 3 are correct whereas 4 is incorrect.
  • Incorrect statement can be corrected as AIDS do not spread by touching, kissing and sharing food, etc., with patient.
  • It is a fluid transmitted disease that spread through blood or sexual secretions.

AIDS and HIV Objective Questions for NEET

Question 17. Modes of transmission of HIV occurs by

  1. Sexual contact with infected person.
  2. Transfusion of contaminated blood.
  3. Sharing infected needles.
  4. From infected mother to her baby mthrough placenta.

Which of the statements given above are correct?

  1. 1 and 2
  2. 1 and 3
  3. 2, 3 and 4
  4. 1, 2, 3 and 4

Answer: 4. 1, 2, 3 and 4

Transmission of HIV infection generally occurs by sexual contact with infected person, by transfusion of contaminated blood and blood products, by sharing infected needles as in the case of intravenous drug abusers and from infected mother to her child through placenta.

Question 18. World health organisation has started a number of programmes to prevent the spread of HIV infection. Identify them.

  1. Ensuring use of disposablem needles and syringes.
  2. Free distribution of condoms.
  3. Advocating safe sex.
  4. Controlling drug abuse.

Which of the steps given above are correct?

  1. 1 and 3
  2. 3 and 4
  3. 2, 3 and 4
  4. 1, 2, 3 and 4

Answer: 4. 1, 2, 3 and 4

  • World Health Organisation has started a number of programmes to prevent the spreading of HIV infection that includes
  • Making blood from blood banks safe from hiv
  • Ensuring the use of only disposal needles and syringes
  • Free distribution of condoms
  • Controlling drug abuse
  • Advocating safe sex and promoting regular checkups

Topic-wise AIDS MCQs for NEET with Explanation

Question 19. Choose the wrong statement.

  1. HIV has RNA as its genetic material
  2. HIV replicates in T-lymphocytes
  3. Antiretroviral drugs are partially, effective for AIDS treatment
  4. HIV spreads by sexual contact or sharing needle with the infected person and not by mere touch or physical contact with infected person
  5. The time lag between the infection and appearance of AIDS symptoms may vary from few hours to a week

Answer: 5. The time lag between the infection and appearance of AIDS symptoms may vary from few hours to a week

“questions about aids “

  • Statement in option (5) is wrong and can be corrected as There is always a time lag between the infection and appearance of AIDS symptoms.
  • This period may vary from a few months to many years (usually 5-10 years).

Question 20. Select the incorrect statement with respect to HIV structure.

  1. The core has two single-stranded RNA
  2. RNA is bound to nucleocapsid proteins
  3. Matrix is surrounded by a lipid bilayer envelope
  4. No glycoproteins is anchorded to lipid bilayer envelope

Answer: 4. No glycoproteins is anchorded to lipid bilayer envelope

  • Statement in option (4) is incorrect and can be corrected as Two glycoproteins, viz. gp120 and gp 41 are anchorded to the lipid bilayer envelope of HIV.
  • These glycoproteins help HIV to anchor to host cell and enter into it. Rest statements are correct with respect to HIV structure.

NEET Biology Mcqs

Question 21. During the treatment of AIDS, combination of several antiretroviral drug therapy is called

  1. Highly Active Antiretroviral Therapy
  2. Highly Accurate Antiretroviral Therapy
  3. High Active Antiretroviral Therapy
  4. High Accurate Antiretroviral Therapy

Answer: 1. Highly Active Antiretroviral Therapy

HAART is a Highly Active Anti Retroviral Therapy used in treatment of HIV. It has been very effective in reducing the number of HIV particles.

Question 22. ELISA stands for

  1. Enzyme linked Immuno Sorbent Assay
  2. Enzyme linked Immunesort Assay
  3. Enzyme like Immunosorbent Assay
  4. Enzyme like Immunesort Assay

Answer: 1. Enzyme linked Immuno Sorbent Assay

An Enzyme-Linked Immuno-Sorbent Assay, also called ELISA is a test that detects and measures antibodies in your blood.

“hiv aids questions “

Question 23. The confirmatory test used to diagnose AIDS is

  1. ELISA
  2. Western blot
  3. ESR
  4. PCR
  5. None of these

Answer: 1. ELISA

AIDS is diagnosed by ELISA test. It is a technique used to detect and quantitate extremely small amount of a protein, antibody or antigen with the help of enzyme.

Question 24. ELISA assay

  1. Uses complement mediated cell lysis
  2. Uses a radiolabelled second antibody
  3. Involves addition of substrate which is converted into coloured end product
  4. Requires red blood cells

Answer: 3. Involves addition of substrate which is converted into coloured end product

  • In ELISA (Enzyme Linked Immuno Sorbant Assay), the antibody is bound to an inert polymer support and then exposed to the sample.
  • The second antibody used is one that has an enzyme attached to it that converts a colourless or non-fluorescent substrate into a coloured or fluorescent product.

NEET Biology AIDS and HIV Practice Questions

Question 25. ELISA is used to detect viruses, where

  1. DNA-probes are required
  2. Southern blotting is done
  3. Alkaline phosphatase is the key reagent
  4. Catalase is the key reagent

Answer: 3. Alkaline phosphatase is the key reagent

In ELISA test, the commonly used enzymes are peroxidase and alkaline phosphatase. Southern blotting and DNA probes are used in molecular analysis of DNA. Catalase is not involved in ELISA.

NEET Biology Mcq Chapter Wise

Question 26. ELISA test and Western blot test gives result only after

  1. 5-6 weeks
  2. 2-30 weeks
  3. 1-35 weeks
  4. 2-24 weeks

Answer: 4. 2-24 weeks

ELISA and Western blot test give results only after 2-24 weeks of HIV infection as no antibodies are formed before this period.

NEET Biology Mcqs

Question 27. Which of the following is correct regarding AIDS causative agent HIV?

  1. HIV is enveloped virus containing one molecule of single-stranded RNA and one molecule of reverse transcriptase
  2. HIV is enveloped virus that containing two identical molecule of single-stranded RNA and two molecules of reverse transcriptase
  3. HIV is unenveloped retrovirus.
  4. HIV does not escape, but attacks the acquired immune response

Answer: 2. HIV is enveloped virus that containing two identical molecule of single-stranded RNA and two molecules of reverse transcriptase

  • Option (2) is correct regarding AIDS causative agent HIV.
  • Other statements are incorrect and can be corrected as
  • HIV is a virus containing dsRNA and reverse transcriptase enzyme enveloped by protein coat.
  • HIV is enveloped retrovirus.
  • HIV escapes the immune cells and attacks helper T-cells of immune system.

Question 28. In AIDS dementia, a person

  1. Show loss of appetite
  2. Suffer from high fever
  3. Develops discoloured patches on the skin
  4. Suffers from loss of memory and problem in coordination

Answer: 4. Suffers from loss of memory and problem in coordination

These symptoms are seen with HIV-linked dementia memory loss, thinking problems, trouble concentrating or staying focused, trouble speaking clearly or accurately, lack of interest in activities you used to enjoy, slow loss of motor skills or less coordination.

Question 29. The below flowchart describes the replication of retrovirus in a host cell. Observe and fill up the blanks A, B and C.

  1. A–Retrovirus, B–viral DNA is produced, C–New viral RNA is produced by host cell
  2. A–Transcriptase, B–Bacterial RNA is produced, C–New viral DNA is produced by the infected cell
  3. A–Reverse transcriptase, B–Viral DNA is produced, C–New viral RNA is produced by the infected cell
  4. A–Reverse transcriptase, B–Viral DNA is produced, C–New viral DNA is produced by the host cell

Human Health And Diseases Topic 4 Aids Flowchart

Answer: 3. A–Reverse transcriptase, B–Viral DNA is produced, C–New viral RNA is produced by the infected cell

Question 30. Consider the following statements about AIDS.

  1. People suffering from AIDS are easily infected by bacteria, viruses and even parasites.
  2. The person is prone to infection.
  3. National AIDS Control Organisation (NACO) and non-governmental organisations are trying their best to educate people about AIDS.

AIDS Symptoms and Prevention MCQs for NEET

Which of the statements given above are correct?

  1. 1 and 2
  2. 1 and 3
  3. 2 and 3
  4. 1, 2 and 3

Answer: 4. 1, 2 and 3

  • All given statements are correct about AIDS. The number of helper T-lymphocytes progressively decreases in the body of the infected persons.
  • With the decrease in number of T-cells, the immunity also decreases. Due to this, person is unable to produce any immunity even against common bacteria like Mycobacterium.
  • NACO and non-governmental organisation are trying their best to educate people.

NEET Biology Mcq Chapter Wise

Question 31. The word NACO stands for

  1. National AIDS Control Organisation
  2. Non-Governmental AIDS Control Organisation
  3. National Agrochemical Organisation
  4. Both (2) and (3)

Answer: 1. National AIDS Control Organisation

NACO stands for National AIDS Control Organisation. It was established in 1991.

NEET Biology Mcqs

Question 32. It is normally a rare cancer but became a marker for AIDS/HIV patients.

  1. Squamous cell carcinoma
  2. Retinoblastoma
  3. Kaposi’s sarcoma
  4. Leukaemia

Answer: 3. Kaposi’s sarcoma

  • Kaposi’s sarcoma is a malignant tumour arising from blood vessels in the skin and appearing as purple to dark brown plaques or nodules. It is common in patients with AIDS.
  • The tumour evolves slowly, radiotherapy is the treatment of choice for localised lesions, but chemotherapy may be of value in metastatic disease.

AIDS Related Diseases MCQs for NEET with Answers

Question 33. In AIDS, which kind of tumour is common?

  1. Lymphoma
  2. Sarcoma
  3. Adenocarcinoma
  4. Carcinoma

Answer: 2. Sarcoma

Sarcoma is the cancer of primitive mesodermal tissue like connective tissue, bone, muscle, etc. It is quite common in AIDS patients.

Question 34. AIDS can be prevented by avoiding unprotected sexual contact with

  1. Multiple partners
  2. HIV +ve person
  3. Homosexual
  4. All of the above

Answer: 4. All of the above

  • HIV is transmitted in blood, semen and vaginal fluid. The major routes of infection are unprotected vaginal and anal intercourse, intravenous drug abuse, the administration of contaminated blood, etc.
  • It can be prevented by avoiding unprotected sex with HIV positive, multiple partners and homosexuals, etc.

Question 35. The ‘window period’ in case of HIV infection is the

  1. Period with clear cut observable symptoms
  2. Stage, which has highest % of antibodies in blood
  3. Period in which infected person is tested negative when subjected to antibody blood test
  4. Stage when the person is not infected

Answer: 3. Period in which infected person is tested negative when subjected to antibody blood test

  • Window period is the period between the onset of infection with HIV and the appearance of detectable antibodies to the virus.
  • The window period is about three weeks. Within this period, the infected person is tested negative even when subjected to antibody blood test.

Question 36. Choose the incorrectly matched pair(s) of given drugs and function.

  • Dextran sulphate – Acts as reverse transcriptase inhibitor
  • Dioxycytosine – Inhibits reverse transcription
  • Phosphonoformate – Inhibits reverse transcription

Choose the correct option.

  1. Only 1
  2. 1 and 3
  3. 1, 2, 3
  4. Only 3

Answer: 4. Only 3

I is incorrectly matched pair and can be corrected as Dextran sulphate inhibits viral binding to the host cell. Reverse transcriptase inhibition is carried out by azidothymidine.

Rest options are correctly matched pairs.

Question 37. AZT is used to treat

  1. Malaria
  2. AIDS
  3. TB
  4. Kala-azar

Answer: 2. AIDS

Azidothymidine or AZT is a drug which suppresses AIDS.

NEET Biology Mcq Chapter Wise

Question 38. Consider the following statement.

  • AIDS has no cure, prevention is the best option.
  • During HIV infection, the person suffers from fever, weight loss and diarrhoea.
  • AIDS is a retrovirus, which means its genetic material is DNA.

Choose the option containing correct statements.

  1. 1 and 2
  2. 1 and 2
  3. 2 and 2
  4. None of them

Answer: 1. 1 and 2

  • All give stataement are correct except statement 3 incorrect statement can be corrected as
  • All the groups of viruses contain RNA and reverse transcriptase, including the virus that causes AIDS.
  • So, its genetic material is RNA.

Question 39. Assertion (A) AIDS and hepatitis-B are sexually transmitted diseases.

  1. Reason (R) There is no permanent cure for both of them.
  2. Both A and R are true and R is the correct explanation of A
  3. Both A and R are true, but R is not the correct explanation of A
  4. A is true, but R is false
  5. Both A and R are false

Answer: 2. Both A and R are true, but R is not the correct explanation of A

  • Both A and R are true, but R is not the correct explanation of A.
  • Diseases or infections which are transmitted through sexual intercourse are called Sexually Transmitted Diseases (STDs).
  • AIDS and hepatitis-B are sexually transmitted diseases.
  • There is no permanent cure for AIDS and hepatitis-B.

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