Question: (a) When a nucleotide is removed by the proofreading function during replication, it is a monophosphate. Explain why. (1 mark) (b) Describe the process of

 (a) When a nucleotide is removed by the proofreading function during

(a) When a nucleotide is removed by the proofreading function during replication, it is a monophosphate. Explain why. (1 mark) (b) Describe the process of non-homolougous end joining, the situation in which it would be used, and the potential disadvantages and advantages for the cell in using it. (2 marks) (c) Explain how a miRNA regulates the expression of a gene. (2 marks)

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