ICSE Class 10 Biology Question 12 of 18

Structure of Chromosomes, Cell Cycle and Cell Division — Question 16

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Question

Question 16

The pyrimidine bases of DNA are:

  1. Adenine and Guanine
  2. Guanine and Cytosine
  3. Adenine and Thymine
  4. Thymine and Cytosine
Answer

Thymine and Cytosine

Reason — Thymine and Cytosine are pyrimidine; and Adenine and Guanine are purine.


Source: This question is from Structure of Chromosomes, Cell Cycle and Cell Division, Biology — Class 10, ICSE Board.

Key Concepts Covered

This question tests your understanding of the following concepts from the chapter Structure of Chromosomes, Cell Cycle and Cell Division: Question, Pyrimidine, Bases, Dna, Adenine, Guanine. These are fundamental topics in Biology that students are expected to master as part of the ICSE Class 10 curriculum.

A thorough understanding of these concepts will help you answer similar questions confidently in your ICSE examinations. These topics are frequently tested in both objective and subjective sections of Biology papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.

How to Approach This Question

Read the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.

Key Points to Remember

  • Use precise scientific terminology as defined in the textbook.
  • Draw and label diagrams neatly for full marks.
  • Understand the difference between structure and function.
  • Learn processes step-by-step in the correct sequence.

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