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bio 3/4

gene structure and regulation

QuestionAnswer
What is the difference between structural and regulatory genes? Structural genes codes for proteins involved in structure and function, e.g., enzymes, antibodies, cytoskeleton. Regulatory genes determine the activity of the gene and transcription factors.
What is the structure of genes in eukaryotic genes? Stop and start triplet, promoter region where the RNA polymerase binds, exons are coding regions of DNA and introns are non-coding regions of DNA.
What is an operon? A functioning unit of DNA containing a group or cluster of genes under the control of a single promoter. Exists mostly in prokaryotes to increase efficiency.
What is a transcription factor? Any factor which can affect the rate of transcription.
What is the lac operon? A lactose operon found in E. Coli. It is an inducible operon (can be turned on or off), only begins to code when lactose is available.
Created by: lucyokane
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