Question

transcription in eukaryotes requires which of the following in addition to rna polymerase?
○ the protein product of the promoter
○ start and stop codons
○ ribosomes and trna
○ several transcription factors

Explanation:

1. Analyze each option:

• "the protein product of the promoter": Promoters are DNA sequences, and their "product" isn't a protein needed for transcription initiation in the way this suggests. Promoters bind transcription factors and RNA polymerase, but they don't produce a protein for this process.
• "start and stop codons": These are involved in translation (protein synthesis), not transcription. Transcription deals with DNA to RNA, while codons are for RNA to protein.
• "ribosomes and tRNA": Ribosomes and tRNA are part of the translation machinery, not transcription. Transcription occurs in the nucleus (in eukaryotes) and involves DNA and RNA polymerase, while translation is in the cytoplasm with ribosomes and tRNA.
• "several transcription factors": In eukaryotes, transcription factors are required to help RNA polymerase bind to the promoter and initiate transcription. They form a pre - initiation complex with RNA polymerase at the promoter region of the DNA.

Answer:

D. several transcription factors