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Biology · 2026 · 3 marks
CBSE 2026 · Region 1 · Set 3 · Q27
Suggest and describe a technique through which a healthy sugarcane plant can be obtained from virus infected sugarcane plant.
Suggest and describe a technique through which a healthy sugarcane plant can be obtained from virus infected sugarcane plant.
Marking-scheme solution
-Tissue culture
-Meristem (apical and axillary) of a virus infected plant, is grown in sterile nutrient medium (in vitro).
-Carbon source as sucrose is added to the medium
-inorganic salts , vitamins and amino acids are added to the medium-Growth regulators like Auxins and Cytokinins are also provided.
Thus a healthy sugarcane plant is regenerated which is genetically similar to parent plant
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CBSE Class 12 Biology past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.