During transcription, the DNA site at which RNA polymerase binds is called the:
Correct answer: A. Promoter
- A. Promoter
- B. Regulator
- C. Receptor
- D. Enhancer
Explanation
The DNA site at which RNA polymerase binds during transcription is called the promoter. The promoter is a region of DNA that is located upstream of the gene that is being transcribed. It contains sequences that are recognised by RNA polymerase and other transcription factors. These sequences help to position RNA polymerase correctly at the start of the gene and to initiate transcription.The other options are incorrect because:A regulator is a protein that binds to DNA and regulates the transcription of genes.A receptor is a protein that binds to a ligand and triggers a cellular response.An enhancer is a regulatory sequence that can bind transcription factors and increase the expression of a nearby gene.
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Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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