CBSE Class 12 Biology Biotech Principles and Process. CBSE issues sample papers every year for students for class 12 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 12 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.

ONE MARK QUESTIONS

1.Name the technique used for separating DNA fragments in the laboratory.

2.DNA isolation involves many enzymes. Identify the enzyme used for digesting a fungal cell wall.

2 MARK QUESTIONS

3.How can DNA segments, separated by gel electrophoresis, be visualised and isolated?

4.Why is Agrobacterium tumefaciens a good cloning vector? Explain.

5.Explain the contribution of Thermus aquaticus in the amplification of a gene of interest.

3 MARK QUESTIONS

6.a) What are molecular scissors? Give one example. 

b) Explain their role in recombinant DNA technology.

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