Gene Regulation Order of Operon Quiz

What is the process called that determines which genes will be turned on and which genes will be turned off?

• Gene regulation

• Gene synthesis

• Gene replication

• Gene transcription

Which enzyme is needed to start transcription?

• Protein polymerase

• RNA polymerase

• Enzyme polymerase

• DNA polymerase

What is the sequence of DNA where RNA polymerase can bind to called?

• Repressor

• Promoter

• Operator

• Enzyme

What happens if the repressor binds to the operator?

• RNA polymerase is blocked

• All of the above

• mRNA cannot be made

• Proteins cannot be made

What is an operon?

• A sequence of DNA where proteins are synthesized

• A sequence of DNA where enzymes are coded

• A sequence of DNA where the repressor can bind to

• A sequence of DNA where RNA polymerase can bind to

What is the purpose of the repressor in an operon?

• To bind to the DNA and regulate gene expression

• To bind to the mRNA and prevent translation

• To bind to the promoter and start transcription

• To bind to the operator and block RNA polymerase

What happens when lactose is present in the environment?

• Proteins cannot be made

• mRNA cannot be made

• RNA polymerase is blocked

• The repressor binds to the operator

What is the purpose of the enzymes coded by the genes in the Lac Operon?

• To build up proteins

• To break down proteins

• To build up lactose sugar

• To break down lactose sugar

What is the purpose of gene regulation in cells?

• To control the production of enzymes

• To control the production of RNA

• To control the production of proteins

• To control the production of DNA

What can a better understanding of gene regulation help with?

• Treating diseases

• Building proteins

• Breaking down DNA

• Replicating genes