Multiple Choice
Control of gene expression in eukaryotic cells occurs at which level(s)?
337
views
16. Regulation of Expression
Introduction to Regulation of Gene Expression
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of these is a regulatory gene involved in the control of gene expression?
A
LacI
B
LacZ
C
LacY
D
LacA
Verified step by step guidance1
Understand the context: The problem is related to the lac operon, a group of genes involved in lactose metabolism in bacteria. The lac operon includes structural genes and regulatory genes.
Identify the role of each gene: The lac operon consists of three structural genes (LacZ, LacY, LacA) and one regulatory gene (LacI). Structural genes code for proteins involved in lactose metabolism, while the regulatory gene controls the expression of these structural genes.
Focus on the regulatory gene: LacI is the regulatory gene in the lac operon. It codes for the repressor protein that binds to the operator region, controlling the transcription of the structural genes.
Differentiate between structural and regulatory genes: LacZ, LacY, and LacA are structural genes that encode enzymes for lactose utilization. LacI, on the other hand, is responsible for regulating the expression of these genes by producing a repressor protein.
Conclude the identification: Based on the roles, LacI is the regulatory gene involved in controlling the expression of the lac operon genes, while LacZ, LacY, and LacA are structural genes.
6:40mWatch next
Master Introduction to Regulation of Gene Expression with a bite sized video explanation from Jason
Start learningRelated Videos
Related Practice
Introduction to Regulation of Gene Expression practice set
Problem sets built by lead tutorsExpert video explanations