Gene Regulation Quiz

What are the key parts of a gene in prokaryotes?

• Promoter, operator, structural, and regulatory genes

• Exons, introns, codons, and anticodons

• Nucleus, cytoplasm, ribosome, and mitochondria

• DNA, RNA, protein, and lipid

What is an operon?

• A sequence of DNA that codes for a protein

• A group of structural genes under the control of a singular promoter

• A type of cell organelle

• A form of RNA molecule

How is the trp Operon regulated?

• By activation and suppression

• By repression and attenuation

• By translation and transcription

• By mutation and selection

What is the process by which the expression of a gene is controlled?

• Gene Regulation

• Gene Mutation

• Gene Cloning

• Gene Sequencing

Why don't specialized cells express all 20,000 genes in the genome?

• To save energy

• To increase mutation rates

• To enhance cell division

• To improve protein synthesis

What is the primary role of structural genes?

• To produce regulatory proteins

• To produce proteins involved in the structure or function of a cell

• To inhibit gene expression

• To increase the rate of transcription

Where are structural genes typically found in relation to regulatory genes?

• Upstream

• Downstream

• Adjacent

• Within the same sequence

What is the function of repressor proteins?

• Increase the expression of structural genes

• Inhibit or decrease the expression of structural genes

• Initiate transcription

• Modify mRNA post-transcriptionally

What do activator proteins do in gene regulation?

• Decrease the rate of gene transcription

• Inhibit the expression of regulatory genes

• Initiate or increase the expression of structural genes

• Produce peptide hormones

In eukaryotes, what is the role of transcription factors?

• They bind to promoter sequences to regulate gene expression.

• They degrade mRNA to stop gene expression.

• They replicate DNA during cell division.

• They transport proteins across the cell membrane.