The diagram is most likely to be of A - VCE - SSCE Biology - Question 9 - 2009 - Paper 1

The diagram most likely illustrates the process of transcription.

Explanation of Transcription

Transcription is the process by which the information in a gene is transferred to messenger RNA (mRNA). During this process:

1. Initiation: RNA polymerase binds to the promoter region of the DNA, leading to the unwinding of the DNA strand.
2. Elongation: RNA polymerase synthesizes the mRNA strand by adding complementary RNA nucleotides to the growing chain, which pairs with the DNA template strand.
3. Termination: The process continues until a termination signal is reached, resulting in the release of the newly synthesized mRNA molecule.

This process is crucial for gene expression, as it is the first step in the production of proteins.