A comprehensive platform for Teachers to create standard question papers and Students to practice Case-Based, Assertion-Reason, and Critical Thinking questions.
Create professional PDF/Word papers with logo, instructions, and mixed question types in minutes.
Explore our repository by Class and Topic. Filter by "Knowledge" or "Competency" levels.
For Students. Take timed MCQ tests to check your understanding. Get instant feedback.
According to NEP 2020, rote learning is out. The focus has shifted to assessing a student's ability to apply concepts in real-life situations.
Questions derived from real-world passages to test analytical skills.
Testing the logic behind concepts, not just the definition.
Open-ended scenarios that require thinking beyond the textbook.
We provide complete AI-Powered Explanations for every question.
Assertion A states that lysozyme is used to disrupt bacterial cells and cellulase is used for plant cells. In recombinant DNA technology, the first step is the isolation of DNA. Since bacterial cells have a cell wall made of peptidoglycan, lysozyme is the appropriate enzyme to break it down. Similarly, plant cells have a cell wall made of cellulose, requiring cellulase for degradation. Thus, Assertion A is correct.
Reason R states that the isolation of genetic material needs the disruption of cells. This is a fundamental principle of biotechnology. To access the DNA contained within the nucleus or cytoplasm, the cell membrane and cell wall must be ruptured. Thus, Reason R is correct.
The reason why we use specific enzymes like lysozyme or cellulase is precisely because the isolation of genetic material requires the disruption of the cell wall. Therefore, the use of these specific enzymes is a direct consequence of the need to isolate genetic material. Thus, Reason R is the correct explanation of Assertion A.
Final Answer: Both A and R are correct and R is the correct explanation of A