Science & Technology·Prelims Strategy

DNA and RNA — Prelims Strategy

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Version 1Updated 10 Mar 2026

Prelims Strategy

For Prelims, a strong grasp of the fundamental concepts and factual details related to DNA and RNA is essential. Focus on the distinct structural components (sugar, bases, strands) of DNA and RNA, and be able to clearly differentiate between them.

Memorize the functions of mRNA, tRNA, and rRNA. Understand the basic steps and key enzymes involved in DNA replication, transcription, and translation. Pay close attention to the properties of the genetic code (universality, degeneracy, start/stop codons).

Current affairs related to DNA technology, such as CRISPR applications, mRNA vaccines, and new sequencing methods, are frequently tested. Create flashcards for key terms (e.g., nucleotide, codon, helicase, ligase) and their definitions.

Practice MCQs that test conceptual understanding and factual recall, including those that present common misconceptions as trap options. Emphasize understanding the 'why' behind each process, not just the 'what'.

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