DNA Replication

What do enzymes do?

• Speed up chemical changes

• Start chemical changes

• Slow down chemical changes

• nothing

Which of the following enzymes starts the DNA replication process by unzipping the DNA strand?

• Helicase

• Primase

• DNA Polymerase

• Ligase

Which of the following enzymes leaves "primers" on the DNA strand to tell another enzyme where to start building?

• Helicase

• Primase

• DNA Polymerase

• Ligase

Which of the following enzymes adds new nucleotides to build the new strand of DNA?

• Helicase

• Primase

• DNA Polymerase

• Ligase

Which of the following enzymes glues together the fragments on the lagging strand?

• Helicase

• Primase

• DNA Polymerase

• Ligase

DNA strands move in an antiparallel pattern, what does this mean?

• the strands move in opposite directions

• the strands move in the same direction

• they crisscross each other

Which of the following is the first step in DNA replication?

• Helicase breaks the hydrogen bonds between the bases to split the original strand.

• Primase marks where to start building the new strand of DNA

• DNA Polymerase starts to attach new nucleotides to the original strand

• There are fragments left on the lagging strand when DNA polymerase is done

• Ligase glues together the fragments on the lagging strand of DNA

Which of the following is the second step in DNA replication?

• Helicase breaks the hydrogen bonds between the bases to split the original strand.

• Primase marks where to start building the new strand of DNA

• DNA Polymerase starts to attach new nucleotides to the original strand

• There are fragments left on the lagging strand when DNA polymerase is done

• Ligase glues together the fragments on the lagging strand of DNA

Which of the following is the third step in DNA replication?

• Helicase breaks the hydrogen bonds between the bases to split the original strand.

• Primase marks where to start building the new strand of DNA

• DNA Polymerase starts to attach new nucleotides to the original strand

• There are fragments left on the lagging strand when DNA polymerase is done

• Ligase glues together the fragments on the lagging strand of DNA

Which of the following is the fourth step in DNA replication?

• Helicase breaks the hydrogen bonds between the bases to split the original strand.

• Primase marks where to start building the new strand of DNA

• DNA Polymerase starts to attach new nucleotides to the original strand

• There are fragments left on the lagging strand when DNA polymerase is done

• Ligase glues together the fragments on the lagging strand of DNA