Q. No.Coronavirus disease 2019 (COVID-19) is an infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Identify the incorrect statement regarding the virus/disease:
1.
The virus is a single-stranded RNA retrovirus.
2.
Transmission of the virus can occur by direct contact with infected people and indirect contact with surfaces in the immediate environment or with objects used on the infected person.
3.
Common symptoms include fever, cough, and shortness of breath.
4.
Hand washing, face masks, quarantine, social distancing are important in the control of the pandemic as no cure or vaccine is available yet.
Trypanosomabrucei, the pathogen responsible for causing African sleeping sickness in humans, is a:
| 1. | Sporozoan | 2. | Heterotrophic eubacteria |
| 3. | Flagellated protozoan | 3. | Pathogenic fungus |
Consuming water contaminated with toxic levels of cadmium can cause:
| 1. | Methemoglobinemia | Black foot disease | |
| 3. | Itai – itai | Minamata disease |
A highly effective recombinant vaccine is available for the prevention of:
| 1. | Poliomyelitis | 2. | Covid-19 |
| 3. | HIV infection | 4. | Hepatitis B |
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What is common to the diseases given in the box?
|
Type 1 diabetes, Graves' disease, Multiple sclerosis, Psoriasis, Rheumatoid arthritis, Myasthenia gravis, and Systemic lupus erythematosus |
| 1. | They are congenital diseases |
| 2. | They are caused by multiple mutational events |
| 3. | They result from the loss of capability of the immune system to distinguish between self and non-self |
| 4. | They are completely curable |
Antiserum provides:
| 1. | natural active acquired immunity |
| 2. | artificial active acquired immunity |
| 3. | natural passive acquired immunity |
| 4. | artificial passive acquired immunity |
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CD4 proteins on a helper T cell are non-functional. In such a situation, these T helper cells will not be able to:
| 1. | lyse tumor cells. |
| 2. | stimulate a cytotoxic T cell. |
| 3. | interact with a class I MHC-antigen complex. |
| 4. | interact with a class II MHC-antigen complex. |
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The most common opportunistic infection associated with AIDS is :
1. Tuberculosis
2. Pneumocystis carinii pneumonia
3. Cryptococcal meningitis
4. Toxoplasma encephalitis
Methanol is converted to formaldehyde in our bodies. It inhibits mitochondrial cytochrome c oxidase. It also causes blindness. The treatment of methanol toxicity is :
| 1. | Thiamine | 2. | L - Dopa |
| 3. | Ethanol | 4. | Atropine |
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