How does one visualise DNA on an agarose | Class 12 Biology Chapter Biotechnology Principles and Process, Biotechnology Principles and Process NCERT Solutions

Current NCERT chapter

Academic session 2026-27, Chapter 9 in the current curriculum.

Welcome to the NCERT Solutions for Class 12 Biology - Chapter Biotechnology Principles and Process. This page offers a step-by-step solution to the specific question from Exercise 0, Question 6:

How does one visualise DNA on an agarose gel?

. With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 6:

How does one visualise DNA on an agarose gel?

Answer:

Gel electrophoresis technique is used to separate the DNA fragments, in which matrix, agarose gel is used. DNA fragments moves towards the anode according to their molecular size through this gel, and then the smaller fragments get separated from the larger fragments. And, these separated DNA fragments can be only observed after staining with the solution of ethidium bromide. Bright orange colour bands will appear only under the UV- light. Ethidium bromide is the most commonly used fluorescent dyes which is used to intercalate between bases of nucleic acids and their fragments. It is used because of its short staining time.

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

  • Read the question carefully and focus on the core concept being asked.
  • Reference examples and data from the chapter when answering questions about Biotechnology Principles and Process.
  • Review previous year question papers to get an idea of how such questions may be framed in exams.
  • Practice answering questions within the time limit to improve your speed and accuracy.
  • Discuss your answers with your teachers or peers to get feedback and improve your understanding.

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Welcome to the NCERT Solutions for Class 12 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 6: How does one visualise DNA on an agarose gel?....

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