Table of contents

1. Introduction to Genetics51m
2. Mendel's Laws of Inheritance3h 37m
3. Extensions to Mendelian Inheritance2h 41m
4. Genetic Mapping and Linkage2h 28m
5. Genetics of Bacteria and Viruses1h 21m
6. Chromosomal Variation1h 48m
7. DNA and Chromosome Structure56m
8. DNA Replication1h 10m
9. Mitosis and Meiosis1h 34m
10. Transcription1h 0m
11. Translation58m
12. Gene Regulation in Prokaryotes1h 19m
13. Gene Regulation in Eukaryotes44m
14. Genetic Control of Development44m
15. Genomes and Genomics1h 50m
16. Transposable Elements47m
17. Mutation, Repair, and Recombination1h 6m
18. Molecular Genetic Tools19m
- Genetic Cloning
  9m
- Methods for Analyzing DNA
  9m
19. Cancer Genetics29m
- Overview of Cancer
  21m
- Cancer Mutations
  7m
20. Quantitative Genetics1h 26m
21. Population Genetics50m
- Hardy Weinberg
  19m
- Allelic Frequency Changes
  31m
22. Evolutionary Genetics29m

12. Gene Regulation in Prokaryotes

Lac Operon

Genetics

12. Gene Regulation in Prokaryotes

Lac Operon

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Multiple Choice

Which of the following is not a part of an operon?

Promoter

Repressor

Operator

Enhancer

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Verified step by step guidance

Understand the concept of an operon: An operon is a functioning unit of genomic DNA containing a cluster of genes under the control of a single promoter. It is a key concept in prokaryotic gene regulation.

Identify the components of an operon: Typically, an operon includes a promoter, an operator, and one or more structural genes. The promoter is the site where RNA polymerase binds to initiate transcription. The operator is a segment of DNA that a repressor binds to, regulating the expression of the genes.

Clarify the role of a repressor: A repressor is a protein that can bind to the operator and inhibit transcription. It is not a physical part of the operon itself but interacts with it to control gene expression.

Define an enhancer: An enhancer is a DNA sequence that can increase the transcription of genes. It is typically found in eukaryotic cells and is not part of the operon structure, which is primarily a prokaryotic feature.

Conclude which element is not part of an operon: Based on the definitions and roles, the enhancer is not a component of an operon, as it is associated with eukaryotic gene regulation rather than prokaryotic operons.