Quick 10Q: DNA Replication

Which of the following enzymes is responsible for synthesizing the new DNA strand?

• DNA polymerase

• Helicase

• Primase

• DNA ligase

What is the difference between leading and lagging strands?

• DNA is synthesized in a 5' to 3' direction on the lagging strand and a 3' to 5' direction on the leading strand

• DNA is synthesized in a 3' to 5' direction on the lagging strand and a 5' to 3' direction on the leading strand

• DNA is synthesized continuously on the leading strand and discontinuously on the lagging strand

• DNA is synthesized discontinuously on the leading strand and continuously on the lagging strand

Which of the following enzymes is responsible for joining the Okazaki fragments?

• DNA polymerase

• Helicase

• Primase

• DNA ligase

Which of the following explains the base pairing rules?

• G pairs with T with 3 hydrogen bonds and A pairs with C with 2 hydrogen bonds

• G pairs with T with 2 hydrogen bonds and A pairs with C with 3 hydrogen bonds

• A pairs with T with 2 hydrogen bonds and G pairs with C with 3 hydrogen bonds

• A pairs with T with 3 hydrogen bonds and G pairs with C with 2 hydrogen bonds

Which of the following enzymes is responsible for breaking the hydrogen bonds between nucleotides?

• DNA polymerase

• Helicase

• Primase

• DNA ligase

Which of the following explains why DNA polymerase requires primase for synthesis of a new strand?

• DNA polymerase requires an open 3' end

• DNA polymerase requires an open 5' end

• DNA polymerase requires ATP

• DNA polymerase requires a promoter

Which of the following describes the 5' end?

• phosphate attached to the pentose sugar

• hydroxyl attached to the pentose sugar

• nitrogenous base attached to the pentose sugar

• the next nucleotide attached to the pentose sugar

Which of the following describes how DNA replication differs between a prokaryotes and eukaryotes?

• Prokaryotes have circular DNA requiring one origin of replication while eukaryotes have multiple origins on linear DNA

• Prokaryotes have linear DNA requiring one origin of replication while eukaryotes have multiple origins on circular DNA

• Prokaryotes have circular DNA requiring multiple origins of replication while eukaryotes have one origin on linear DNA

• Prokaryotes have linear DNA requiring multiple origins of replication while eukaryotes have one origin on circular DNA

Which of the following describes why there is a leading and lagging strand in DNA replication?

• DNA is antiparallel

• DNA is negatively charged

• DNA has a phosphate group

• DNA has hydrogen bonds

Which of the following strands would be more stable at a higher temperature?

• AATTAATTAATT

• CCGGCCGGCCGG

• ATCGATCGATCGAT

• CGATCGATCGATCG