CBSE 2024-25 Competency-Based Questions With Answers: Assessment plays a crucial role in learning as it helps to solidify the knowledge that students learn throughout the course. Competency-based questions are designed to evaluate the grasp of the students on a certain topic or subject.
The Central Board Of Secondary Education has made available the competency-based questions for class 12 for the academic year 2024-25. Students who want to score well in the exam can take a look at these competency-based questions that are provided chapter-wise along with their answers as well.
In this article, we present the Class 12 Biology Chapter 5, "Human Health And Diseases," competency-based questions for the 2025 examination.
Questions
1. In addition to being a vector, the female Anopheles mosquito also acts as a host for the malarial parasite - Plasmodium. Choose the option that supports the role of the female Anopheles mosquito as a host.
A. Liver cells serve as the site for the multiplication of Plasmodium.
B. Plasmodium completes part of its lifecycle in the female Anopheles.
C. The female Anopheles mosquito lays eggs in stagnant pools of water.
The female Anopheles mosquito transmits Plasmodium to humans by biting.
2. Immuno-suppressants are administered to patients post-organ transplantation and also to those suffering from auto-immune disorders. In which of the following ways are immuno-suppressants helpful?
A. They trigger an allergic response.
B. They eliminate unhealthy tissues.
C. They control the cell-mediated response.
They differentiate between self and non-self parts of the body.
3. Drug abuse is a common problem faced by countries around the world today due to its impact on the health and well-being of an individual.
(a) How is the cocaine consumed? What impact does it have on the body?
(b) Some drugs make an individual sleepy while others make them hyper-energetic. Using appropriate examples, explain this statement.
Why does a regular drug abuser have withdrawal symptoms when consumption of the drug is suddenly stopped?
Answers
- B. Plasmodium completes part of its lifecycle in the female Anopheles.
- C. They control the cell-mediated response.
- (a) 1 mark each for the following:
- Cocaine is usually consumed by snorting/smoking.
- Both these actions involve the respiratory system and so cocaine consumption can interfere with the regular functioning of the respiratory tract.
(b) 1 mark each for naming the correct drug as an example and 0.5 marks each for the explanation:
- Heroin is a drug that acts as a depressant to the functioning of the nervous system and so it slows down bodily functions and makes an individual sleepy.
- Cocaine is a drug that stimulates the nervous system thereby making an individual feel very energetic.
[Accept any other valid answer]
(c) 0.5 marks each for the following:
- Using drugs chronically makes the body used to functioning in the presence of the drug.
Sudden removal of the drug from the body leads to the body asking for the drug through improper functioning or withdrawal symptoms.
Now, that we have provided the questions and answers for CBSE Class 12 Biology Chapter-5 Human Health And Diseases, we are also providing the Free PDF to download the file from the given link below.
If you need the competency-based questions along with the answer key for other chapters as well, then you can keep visiting the Jagran Josh website.
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