The lac operon genes only become expressed if:

the repressor binds to the operator

Which of the following conditions leads to maximal expression of the lac operon?

lactose present, glucose absent

lactose present, glucose present

lactose absent, glucose present

Which sentence is TRUE about structural genes in the absence of lactose?

No transcription and translation occurred

Transcription occurred to synthesis enzyme

Translation occurred to synthesis mRNA

Transcription occurred to synthesis mRNA

Why is apoptosis important for morphogenesis? Select all that apply.

Allows webbing between digits to be removed

a unit made up of linked genes that code for proteins needed to do a specific task

a part of the promoter region of a gene

A protein needed for DNA replication

A section of DNA that codes for a protein

A section of DNA that codes for a characteristic

Lac Operon - Super Joy Quiz Time Good

Authored by O Darling

Biology

9th - 12th Grade

NGSS covered

Used 6+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

regulator

repressor

activator

corepressor

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The "on/off" switch for an operon is called the

promoter

repressor

operator

gene

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Operons are found in the following:

prokaryotes (bacteria)

eukaryotes (plant and animals)

animals only

viruses

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the lac operon the inducer is

allolactose

glucose

galactose

all of the above

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is 1 in the diagram?

RNA polymerase

Inducer

Repressor

Operator

What is 2 in the diagram?

RNA polymerase

Inducer

Repressor

Operator

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is 4 in the diagram?

RNA polymerase

Inducer

Repressor

Operator

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Lac Operon - Super Joy Quiz Time Good

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

The "on/off" switch for an operon is called the

Operons are found in the following:

In the lac operon the inducer is

What is 1 in the diagram?

What is 2 in the diagram?

What is 4 in the diagram?

What is 5 in the diagram?

In the top picture the operon is

In the bottom picture the operon is

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