AIDS

Q.

Which of the following is not a means for transmission of AIDS?

1. Blood transfusion

2. Sexual contact

3. Physical contact

4. Unsterilised injections

Q.

AIDS can spread through playing sports with an infected person.

1. True

2. False

Q.

The virus causing AIDS cannot be transmitted from an infected person to a healthy person by

1. Blood transfusion

2. Shaking hands

3. Sexual contact

4. Infected needles

Q. AIDS is transmitted ___.

1. Sexually
2. Blood transfusion
3. All of these
4. Perinatally

Q. Draw the diagram showing the structure of HIV.

Q. Identify the organism, disease caused and classification of the organism (whether virus, bacterium or protozoan) respectively, based on the given symptom.

1. Loss of immunity - HIV; AIDS; bacterium
2. Loss of immunity - HIV; AIDS; virus
3. Loss of immunity - Plasmodium; malaria; protozoan
4. Loss of immunity - Vibrio cholerae; cholera; bacterium

Q. Human Immunodeficiency Virus (HIV) is a retrovirus that causes Acquired Immune Deficiency Syndrome (AIDS). HIV infection causes a progressive failure of the immune system, causing cancers and various infections to overtake the patient.
HIV is present as both free virus particles and virus within infected immune cells and is transmitted via blood products (contaminated needles, unscreened blood), mother to child (pregnancy, labor, nursing) and unprotected sex. The life cycle of a retrovirus is illustrated below.

What enzyme is needed for the virus to proceed from step 4 to step 5?

1. Host cell DNA polymerase
2. Viral DNA polymerase
3. Viral RNA polymerase
4. Reverse transcriptase

Q. AIDS is caused by HIV, which principally infects

1. All lymphocytes
2. Activator B cells
3. Cytotoxic T cells
4. T-4 lymphocytes

Q. HIV is a retrovirus. Which best describes the flow of genetic information from viral transmission to the production of viral protein?

1. Viral DNA $\to$ Viral RNA $\to$ Protein
2. Viral RNA $\to$ Viral DNA $\to$ Host DNA $\to$ Host RNA $\to$ Protein
3. Viral RNA $\to$ Host DNA $\to$ Protein
4. Viral DNA $\to$ Host DNA $\to$ Host RNA $\to$ Protein

Q. Who received Nobel Prize in $2008$ for the discovery of HIV?

1. Harald Zur Hausen
2. Luc Montagnier
3. Jack Szostak
4. Carol Greider