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To remove contaminating RNA and protein during DNA isolation, the following enzymes are used respectively:
ADNase and lysozyme
BRibonuclease and protease
CCellulase and chitinase
DDNA polymerase and ligase
Answer & Solution
Correct answer: B. Ribonuclease and protease
**Ribonuclease** degrades RNA; **protease** degrades proteins (including histones). DNase would destroy the very DNA we're trying to purify. Cellulase/chitinase digest plant/fungal cell walls — wrong stage for this step.
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