Chapter 18 Notes (Operon)

Chapter 18 Notes (Operon) - Chapter 18 Notes (Operon) AP...

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Chapter 18 Notes (Operon) 1. Basic Characteristics and Definition of Operon a. Operon describes how genes are turned on and turned off. b. It consists of the operator, promoter, and the genes they control. c. Key terms i. Operator: A part of the operon that is controlled by repressor. ii. Repressor: A thing that controls the genes which is separated from genes. iii. Promoter: The part that the RNA polymerase attaches to – the real part that protein is made. d. Two types of gene regulation: Positive and negative – we will focus more on negative gene regulation. i. Negative gene regulation: Prevention of gene expression by the binding of specific repressor to operator sites. ii. Positive Gene Regulation: Stimulation of gene expression (other way around) iii. Therefore, overall reaction for negative gene regulation is to slow down while positive gene regulation is vice versa. 2.
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Chapter 18 Notes (Operon) - Chapter 18 Notes (Operon) AP...

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