Genomes of HIV-I and HIV-II have genes respectively
- 5 and 6
- 6 and 7
- 7 and 8
- 8 and 9
The Correct Option is D
Solution and Explanation
Top Questions on human health and disease
- Early detection of HIV in suspected AIDS patients can be done using the diagnostic technique of:
- CBSE CLASS XII - 2025
- Biology
- human health and disease
Student to attempt either option (A) or (B):
(A) Explain how the immunity of a person is affected if there is atrophy (degeneration) of the thymus gland at an early stage of life.
OR
(B) (i) What are interferons? Explain their role in providing immunity to a person.
(ii) Which category of innate immunity defence barrier can interferons be classified into?- CBSE CLASS XII - 2025
- Biology
- human health and disease
- The type of antibodies produced during an immune response to allergens as dust and pollen grains in a person is:
- CBSE CLASS XII - 2025
- Biology
- human health and disease
- Explain how the immunity of a person is affected if there is atrophy (degeneration) of the thymus gland at an early stage of life.
- CBSE CLASS XII - 2025
- Biology
- human health and disease
Read the following passage and answer the questions that follow.
Deaths related to the use of drugs were estimated at about 5,00,000 in 2019, 17.5 percent more than in 2009. Liver diseases attributed to Hepatitis B are a major cause of drug-related deaths, according to UNODC, accounting for more than half of the total number of deaths attributed to the use of drugs. Drug overdoses account for a quarter of drug-related deaths.
Opioids contribute to account for the most severe drug-related harm, including fatal overdoses, when used non-medically. At the global level, two-thirds of direct drug-related deaths are due to opioids, and in some sub-regions the proportion can be as high as three-quarters of such deaths.
(a) Why are people taking opioids more prone to liver diseases attributed to Hepatitis B?
(b) What is meant by direct drug-related disease?
(c) (i) What is the scientific name of the plant from which the opioids are derived and from which part of the plant is it extracted?
OR
(c) (ii) State two common warning signs of drug abuse among the youth.
- CBSE CLASS XII - 2025
- Biology
- human health and disease
Notes on human health and disease
Concepts Used:
Human Health and Disease
Health is described as a state of complete physical, mental and social well-being.
The disease is a circumstance where malfunctioning of the body organs occurs leading to uneasiness and discomfort.
Differences between Infectious Diseases and Non-Infectious Diseases:
Common Diseases in Humans:
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