Session 12- ANA SI SESSION

In prokaryotic DNA replication, which enzyme is responsible for synthesizing the RNA primer?

• DNA Polymerase III

• DNA Polymerase I

• Ligase

• Primase

Which enzyme is responsible for removing RNA primers during prokaryotic DNA replication?

• DNA Polymerase III

• DNA Polymerase I

• Helicase

• Ligase

In eukaryotic DNA replication, which protein complex is responsible for loading the helicase onto the origin of replication?

• Origin Recognition Complex (ORC)
• Primase
• DNA Polymerase
• Single-strand binding protein

What happens to the lac operon when both lactose and glucose are present in the environment?

• The lac operon is fully activated due to high lactose levels.
• The lac operon is expressed at a high level due to the absence of glucose.
• The lac operon is completely shut down regardless of glucose.
• The lac operon is minimally expressed due to catabolite repression by glucose.

Tags

NGSS.HS-LS2-3

Which of the following is the correct sequence of the -10 region (Pribnow box) of a prokaryotic promoter?

• TATAAC
• TATGAT
• TATATT
• TATAAT

How does allolactose affect the lac operon?

• Allolactose has no effect on the lac operon and does not influence transcription.
• Allolactose induces the lac operon by binding to the repressor, preventing it from inhibiting transcription.
• Allolactose represses the lac operon by enhancing the repressor's activity.
• Allolactose activates the lac operon by promoting the binding of RNA polymerase to the promoter.

Which region of the lac operon does the lac repressor bind to?

• Promoter region
• Structural gene region
• Operator region
• Regulatory region

What is the role of the sliding clamp (PCNA) in eukaryotic DNA replication?

• The sliding clamp unwinds the DNA double helix.
• The sliding clamp (PCNA) enhances the processivity of DNA polymerases during eukaryotic DNA replication.
• The sliding clamp repairs damaged DNA strands.
• The sliding clamp initiates DNA replication at the origin.

In prokaryotic DNA replication, what is the significance of the origin of replication (oriC)?

• The origin of replication (oriC) is the site where DNA replication initiates in prokaryotes.
• oriC is where RNA synthesis begins in prokaryotes.
• oriC is the site for protein synthesis in prokaryotes.
• oriC is involved in the repair of damaged DNA in prokaryotes.

which molecule inhibits the binding of CAP to the lac operon promoter in the presence of glucose?

• ATP
• glucose
• lactose
• cAMP