CBSE Class 10 Science 2017 · Paper 31/2 · Question 2
Newly formed DNA copies may not be identical at times. Give one reason.
Answer
No biochemical reaction is absolutely reliable, so small errors arise while DNA is copied.
DNA is copied by biochemical reactions, and no biochemical reaction is absolutely reliable. Small errors (variations) therefore arise during copying, so a newly formed copy is similar to the original but may not be identical to it.
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