Class 12 Biology — Chapter 9: Biotechnology: Principles and Processes
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Practise Class 12 Biology Chapter 9, "Biotechnology: Principles and Processes", with 90 NCERT-aligned multiple-choice questions. The set is split into 30 Easy, 30 Medium and 30 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams and NEET UG.
"Biotechnology: Principles and Processes" is one of the chapters where diagram-based recall, terminology and NCERT line-by-line accuracy really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Biotechnology: Principles and Processes, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 12 Biology mastery score. A few sample questions are shown below; sign in free to practise all 90.
Key concepts: Biotechnology: Principles and Processes (Class 12 Biology)
This chapter covers the principles and tools of genetic engineering and the processes of recombinant DNA technology.
- Genetic engineering
- Altering an organism's genetic material by inserting genes; relies on recombinant DNA technology.
- Tools of rDNA
- Restriction enzymes (molecular scissors cutting at specific palindromic sites), DNA ligase (joins fragments), and vectors (plasmids) to carry the gene.
- Vectors & host
- A vector with a gene of interest is introduced into a host cell; selectable markers identify transformed cells.
- Key processes
- Isolation of DNA, cutting with restriction enzymes, amplification by PCR, ligation into a vector, transfer into a host, and culturing.
- PCR & bioreactors
- PCR amplifies DNA using primers and a thermostable Taq polymerase; bioreactors enable large-scale culture of the product.
💡 Exam tips for Biotechnology: Principles and Processes
- Restriction enzymes recognise palindromic sequences and produce 'sticky ends' that ligase can join.
- Remember the three steps of a PCR cycle: denaturation, annealing (primers), extension (Taq polymerase).
Sample questions
Restriction enzymes:
Molecular scissors (e.g., EcoRI).
Common cloning vector:
Self-replicating circular DNA in bacteria.
Bioreactors:
Optimal conditions for product synthesis.
Biotechnology: Principles and Processes — FAQs
What are the key concepts in Class 12 Biology Biotechnology: Principles and Processes?+
This chapter covers the principles and tools of genetic engineering and the processes of recombinant DNA technology. Key ideas include Genetic engineering, Tools of rDNA, Vectors & host, Key processes, PCR & bioreactors.
What does Class 12 Biology Chapter 9 (Biotechnology: Principles and Processes) cover on XamBaaz?+
It covers 90 NCERT-aligned MCQs on "Biotechnology: Principles and Processes" — 30 Easy, 30 Medium and 30 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams and NEET UG.
Are these "Biotechnology: Principles and Processes" questions free to practise?+
Yes — sign in with Google to practise "Biotechnology: Principles and Processes" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Biotechnology: Principles and Processes" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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