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Why is a mortar and pestle useful in plant DNA isolation?

Answer and explanation

Correct answer: For grinding plant tissue

Plant tissues often contain rigid cell walls and fibrous material, so mechanical disruption is an important early step in DNA isolation. A mortar and pestle physically grind the tissue into a fine homogenate, increasing the exposed surface area and helping lysis reagents reach more cells. For some tough or frozen tissues, liquid nitrogen keeps the material brittle and limits heat generation during grinding, although it must be handled with suitable safety precautions. Option A is correct because the apparatus performs mechanical tissue disruption. It does not sequence DNA, translate RNA, or serve only as a protein-digestion tool; those processes require different methods or reagents.

Related tags

Mortar And PestlePlant TissueMechanical LysisIsolation Of DnaProcesses Of Recombinant Dna TechnologyBiotechnologyClass 11 Mcq

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