Under theme: Science & Technology
24 PYQs. Learn elimination tricks first, then attempt the questions below.
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Common distractors and how to eliminate wrong options in this subtopic.
Accurately link specific diseases like common cold and AIDS to their respective viral families.
Always be skeptical of absolute statements (e.g., 'No virus can...') in biological questions; they are freque…
Consider the following pairs :
|Vitamin|Deficiency disease|
|-- |--|
|1. Vitamin C | Scurvy|
|2. Vitamin D|Rickets|
|3. Vitamin E | Night blindness|
Which of the pairs given above is/are correctly matched?
Statement 1 is correct: Vitamin C deficiency causes Scurvy is right. Statement 2 is correct: Vitamin D deficiency causes Rickets is right. Statement 3 is incorrect: Vitamin E deficiency causes Night blindness is wrong. Vitamin A deficiency causes Night blindness.
48 min · −33% negative · explanations after submit
Improper handling and storage of cereal grains and oilseeds result in the production of toxins known as aflatoxins which are not generally destroyed by normal cooking process. Aflatoxins are produced by
Aflatoxins are poisonous carcinogens that are produced by certain moulds (Aspergillus flavus and Aspergillus parasiticus), which grow in soil, decaying vegetation, hay, and grain.
48 min · −33% negative · explanations after submit
Which of the following diseases can be transmitted from one person to another through tattooing?
1. Chikungunya
2. Hepatitis B
3. HIV-AIDS
Select the correct answer using the codes given below.
* Chikungunya is a mosquito-borne viral disease that cannot be spread through tattooing. * Hepatitis B is a liver infection that can lead to liver failure and cancer. It's spread through contact with the blood, open sores, or body fluids of an infected person. * HIV is a virus that destroys the white blood cells responsible for fighting infections. It can result in AIDS, the final stage of infection. It spreads mainly through unprotected sex, sharing drug needles, or contact with infected blood.
Which of the following statements is/are correct?
1. Viruses lack enzymes necessary for the generation of energy.
2. Viruses can be cultured in any synthetic medium.
3. Viruses are transmitted from one organism to another by biological vectors only.
Select the correct answer using the codes given below.
Statement 1 is correct: Viruses do not have metabolic machinery of their own. They lack enzymes needed for ATP generation and therefore must depend entirely on a host cell. Statement 2 is incorrect: Viruses cannot be grown on artificial or synthetic media. They need living host cells (bacteria, plants, animals, or cell cultures) to replicate. Statement 3 is incorrect: Transmission can occur through: - Physical contact, respiratory droplets - Contaminated water/food - Airborne routes - Fomites (inanimate objects) - Biological vectors (mosquitoes, ticks, etc.) Hence, vectors are not the only mode of transmission.