Assertion : In transcription only a segment of DNA and only one of the strands is copied into RNA.
Reason : The process of replication, once set in, duplicates the total DNA os an organism.a. If both assertion and reason are true and the reason is the correct explanation of the assertion. b. If both assertion and reason are true but reason is not the correct explanation of the assertion. c. If assertion is true but reason is false. d. If both assertion and reason are false.

Sure! Here are the step by step solutions: 1. In transcription, only a segment of DNA is copied into RNA. 2. Additionally, only one of the strands of DNA is used as a template for the RNA synthesis. 3. The process of transcription begins when RNA polymerase binds to a specific region on the DNA called the promoter. 4. RNA polymerase then unwinds the DNA double helix and begins to synthesize a single-stranded RNA molecule by adding complementary RNA nucleotides to the template strand. 5. The RNA polymerase continues to move along the DNA template strand, adding nucleotides to the growing RNA chain until it reaches the end of the gene or encounters a termination signal. 6. At this point, the RNA polymerase and the newly synthesized RNA molecule dissociate from the DNA template. 7. The RNA molecule may undergo further processing, such as splicing and modification, before it is transported out of the nucleus to be translated into protein. 8. In contrast, the process of replication involves the duplication of the entire DNA molecule of an organism. 9. Replication begins when the DNA double helix is unwound by an enzyme called helicase, creating two separate template strands. 10. DNA polymerase then adds complementary nucleotides to each template strand, resulting in the formation of two identical DNA molecules. 11. The replication process continues until the entire DNA molecule has been copied. 12. The two newly synthesized DNA molecules then wind back up into a double helix structure.