Gene Expression Quiz

What is the role of activators in gene expression?

• Inhibit transcription

• Enhance transcription

• Degrade mRNA

• Replicate DNA

Where do transcription factors bind in the regulation of gene expression?

• Enhancer

• Promoter

• Gene

• RNA polymerase

Which element is responsible for bending DNA to facilitate transcription?

• RNA polymerase

• DNA bending protein

• Enhancer

• Promoter

Which of the following is NOT a component involved in the regulation of gene expression?

• Enhancer

• Promoter

• Ribosome

• Transcription factors

What can influence gene regulation?

• Environmental factors and cell conditions

• The color of the cell

• The size of the organism

• The age of the organism

Which of the following is NOT a factor in gene regulation?

• The color of the cell

• Environmental factors

• Cell conditions

• The amount of proteins

What is the relationship between gene regulation and protein synthesis?

• Gene regulation determines protein levels

• Gene regulation stops protein synthesis

• Gene regulation duplicates proteins

• Gene regulation alters protein structure

Why are genes coding for proteins needed for the same metabolic pathway controlled together in prokaryotes?

• Because they are not needed simultaneously

• Because when you need one of them, you need all of them

• Because they are located on different chromosomes

• Because they are transcribed at different times

What is the main function of an operon in prokaryotic cells?

• To replicate DNA

• To control gene expression

• To degrade proteins

• To synthesize lipids

What is the lac operon responsible for in E. coli?

• Coding for enzymes to digest glucose

• Coding for enzymes to digest lactose

• Coding for enzymes to digest proteins

• Coding for enzymes to digest fats