Transcription Factors

What are the transcription factors?

• Molecules that provide ATP to transcription unit

• Molecules that synthesize RNA during transcription 

• Molecules that bring amino acids to the transcription unit

• Molecules that bind to enhance/inhibit transcription. 

RNA polymerase needs --- to initiate transcription.

• holoenzymes

• transcriptional factors

• histones

• microRNA

When tryptophan (try) is absent, the trp represser unbinds from the operator and this results in RNA synthesis to do what?

• be blocked

• proceed

Which of these is not a function of eukaryotic transcription factors?

• control rate of transcription

• ensure gene is used at the right time

• stabilize the binding of RNA polymerase

• prevent messenger RNA from translating

What role do transcription factors play in gene expression?

• They degrade mRNA after transcription.

• They bind to DNA to regulate transcription.

• They transport RNA out of the nucleus.

• They splice introns from pre-mRNA.

Which of the following is a characteristic of transcription factors?

• They are proteins that bind to specific DNA sequences.

• They are lipids that interact with RNA polymerase.

• They are carbohydrates that modify RNA.

• They are nucleic acids that form ribosomes.

How do transcription factors influence the transcription of a gene?

• By altering the DNA sequence of the gene.

• By binding to enhancers or silencers near the gene.

• By converting DNA into RNA.

• By transporting RNA to the ribosome.

Which of the following is NOT a function of transcription factors?

• Activating or repressing transcription.

• Binding to specific DNA sequences.

• Facilitating RNA splicing.

• Interacting with RNA polymerase.

In eukaryotic cells, where do transcription factors typically bind?

• To the ribosome.

• To the promoter region of a gene.

• To the nuclear envelope.

• To the endoplasmic reticulum.

What is the primary difference between general and specific transcription factors?

• General transcription factors bind to any DNA sequence, while specific ones bind to specific sequences.

• General transcription factors are involved in DNA replication, while specific ones are involved in transcription.

• General transcription factors are required for the transcription of all genes, while specific ones regulate particular genes.

• General transcription factors are found only in prokaryotes, while specific ones are found only in eukaryotes.