CBSE 2022 · Region 1 · Set 3 · Q2 · 2 marks
What are proto oncogenes and why are they called so ?
Marking-scheme solution
Protooncogenes or cellular oncogenes are genes identified in normal cells, when activated under certain condition lead to oncogenic transformation of cells.
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CBSE Class 12 Biology past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.