Final answer:
During transcription, RNA synthesis takes place. This is when a messenger RNA (mRNA) molecule is created using a section of DNA as a template, which later serves as a guide for protein synthesis. The correct answer to the question is D) RNA synthesis.
Step-by-step explanation:
The event that occurs during transcription is RNA synthesis. Transcription is the process of mRNA synthesis using a protein synthesis gene portion of a DNA strand as a template. During this process, a part of the DNA strand that contains a gene or group of related genes is transcribed to form RNA. More specifically, messenger RNA (mRNA) is produced, which provides the instructions for protein synthesis.
This mRNA is later translated into a protein in the cytoplasm of the cell. The stages of transcription include initiation, where the RNA polymerase binds to the DNA and starts synthesizing RNA, elongation, where the RNA strand is extended, and termination, where transcription stops and the RNA polymerase is released along with the newly formed RNA molecule.
Regarding the multiple-choice options, 'Translation of mRNA' occurs after transcription and is not the correct answer. 'Synthesis of DNA' relates to replication, not transcription. 'Formation of ribosomes' is also incorrect as ribosomes are not formed during transcription, though they play a crucial role in translation. Hence, D) RNA synthesis is the correct answer to the question 'Which of the following events occurs during transcription?'