Question

a) Mention two events in which DNA is unzipped.
b) Predict the consequences when both the template and the coding strands of a DNA segment participate in transcription process?

Answer 1

Answer the question

Answer 2

(A) Two events in which DNA is unzipped are :

● Replication : in the process of replication two strands separate and act as a template for the synthesis of new complementary strands of a DNA.

● Transcription : it is a process of copying genetic information from one strand of DNA to RNA. In transcription only a segment of DNA and only one of the strands is copied into RNA.

(B) if both strands of DNA participate in transcription process then :

● both strands will act as a template hence they would code for RNA molecule with different sequences, and in turn, the code for proteins, the sequence of amino acids in the proteins would be different.

● two RNA molecules if produced simultaneously would be complementary to each other, hence would form a double stranded RNA. This would prevent RNA from being translated into protein and the exercise of transcription would become a futile one.