Gene Expression and Regulation

What does the lactose do to the Operon?

• Blocks transcription of the lactase gene by cutting up the DNA

• Binds to the repressor preventing it from attaching to the operator

• The lactose binds promoter to prevent transcription

• Allows for the transcription rate of lactase to slow down

In the lac operon the inducer is

• lactose

• glucose

• galactose

• all of the above

The lac operon genes only become expressed if:

• lactose binds to the repressor

• glucose binds to the repressor

• lactose binds to the operator

• the repressor binds to the operator

What process is steps 1-3 referring to?

• DNA Replication

• Transcription

• Translation

• Nucleus

What is 11. pointing to?

• Cytoplasm

• Ribosome

• mRNA

• Nucleus

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

What is 2. pointing to?

• Cytoplasm

• Ribosome

• mRNA

• Nucleus

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

What process is step 12 referring to?

• DNA Replication

• Transcription

• Translation

• Nucleus

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

What does tRNA carry to the ribosome?

• Nucleus

• Codons

• Amino Acids

• None of the Above

Where does TRANSCRIPTION occur?

• Nucleus

• Ribosome

• Cytoplasm

• Mitochondria

Which process?

• mutation

• transcription

• respiration

• translation

Tags

NGSS.HS-LS1-7

NGSS.HS-LS3-2