Gene Expression

Are you wearing headphones?

• Yes, I know that auditory input is valuable for my learning

• No, I plan to fail my STAAR test and be stuck in high school for another year

Eye cells and stomach cells have very different functions, or jobs.  Is the DNA found in each type of cell the same or different?

• Different

• Same

Each of your body cells contains a full set of your ______. 

• teeth 

• DNA

• nails

Gene Regulation is the process of deciding what 

• amino acids will be transferred over

• DNA will be duplicated

• genes will be turned on/off

Define what an enzyme is.

• a biological substance that speeds up reactions by increasing the activation energy

• a biological substance that speeds up reactions by lowering the activation energy

• a biological substance that slows down reactions by increasing the activation energy

• a biological substance that slows down reactions by lowering the activation energy

Think back to when we studies Protein Synthesis, what happens in Transcription 

• COnverts DNA into Proteins

• Makes more DNA

• Converts DNA into mRNA

What is an operator?

• a sequence of DNA onto which a repressor protein can bind

• a person who answers the phone

When the repressor is bound it

• does not interfere with the RNA Polymerase

• blocks the RNA Polymerase from doing it jobs 

When lactose is not  present the repressor is

• not bonded

• is bonded

This means that 

• the lactose gene is not sythesized

• the lactose gene is synthesized