AP Bio Unit 6

Which of the following correct explains DNA pairing?

• Cytosine pairs with Guanine and has 2 hydrogen bonds, whereas, Adenine pairs with Thymine and has 3 hydrogen bonds.

• Cytosine pairs with Guanine and has 3 hydrogen bonds, whereas, Adenine pairs with Thymine and has 2 hydrogen bonds.

• Cytosine pairs with Thymine and has 3 hydrogen bonds, whereas, Adenine pairs with Guanine and has 3 hydrogen bonds.

• Cytosine pairs with Thymine and has 2 hydrogen bonds, whereas, Adenine pairs with Guanine and has 2 hydrogen bonds.

According to Chargaff's rule, if there is 18% adenine, how much cytosine would there be?

• 18%

• 64%

• 32%

• 25%

Which bases are purines?

• Adenine & Guanine

• Cytosine & Thymine

• Cytosine, Uracil, & Thymine

• Adenine & Thymine

Which model is used to correctly describe DNA Replication?

• Conservative

• Semi-Conservative

• Dispersive

Which enzyme is responsible for unzipping and unwinding DNA?

• Helicase

• DNA Polymerase I

• Single Stranded Binding Proteins (SSBPs)

• Ligase

• DNA Polymerase III

Which enzyme is responsible for holding the DNA strands open?

• Helicase

• DNA Polymerase I

• Single Stranded Binding Proteins (SSBPs)

• Ligase

• DNA Polymerase III

Which enzyme is responsible for binging okazaki fragments together on the lagging strand?

• Helicase

• DNA Polymerase I

• Single Stranded Binding Proteins (SSBPs)

• Ligase

• DNA Polymerase III

Which type of cells need transcription factors for initiation of transcription?

• Eukaryotic
• Prokaryotic

• Both

• Neither

What is shown in this image?

• alternative splicing

• Initiation

• Elongation

• Termination

Which of the following are components of operons?

• promoter

• operon

• gene

• all of the above