Pedigree/Gene Regulation/ Pedigree

A protein that binds to the operator and blocks the RNA polymerase

• regulator
• repressor
• activator
• corepressor

What does the lactose do to the Operon? 

• Blocks transcription because of the energy it provides
• Allows the repressor to be unbind from the Operator.
  
• The lactose binds the lactose and stops transcription
• Allows for the transcription to speed

An operon is

• a genetic on/off switch in prokaryotes

• a genetic on/off switch in eukaryotes

• a group of related genes and the associated gene switches in prokaryotes

• a group of related genes and the associated gene switches in eukaryotes

The purpose of the lac operon is to produce enzymes that

• synthesize lactose

• use lactose

• synthesize tryptophan

• use tryptophan

Where does the RNA Polymerase bind to for the initiation of

• Regulator

• Structural genes

• Operator

• Promotor

Which of the following is a protein produced by a regulatory gene?

• operon

• inducer

• repressor

• corepressor

the lac operon encodes...

• 5 genes

• 3 genes

When lactose is high

• operon is off

• operon is on

When lactose is low in the cell, the repressor protein is

• active

• inactive

___ are DNA sequences which are often located far from the genes they regulate in eukaryotes where transcription activators can bind.

• histones

• promotors

• enhancers