DNA Replication, Mitosis and Meiosis

Which bonds are broken when DNA is separated into two template strands?

• Helicase

• Covalent

• Hydrogen

• Ionic

DNA polymerase is responsible for:

• Unwinding the double helix

• Breaking covalent bonds between phosphates and sugars

• Forming hydrogen bonds between nitrogenous bases

• Adding free nucleotides to the new complementary strand

Mitosis and meiosis are both types of cell division

• TRUE

• FALSE

Which statement is correct?

• Meiosis is for gametes while mitosis is for somatic cells

• Meiosis and mitosis both create genetic variation in eggs and sperm

• Meiosis is for all cells while mitosis is for gametes only

• All are incorrect

DNA replication occurs during:

• Interphase

• mitosis

• meiosis

• protein synthesis

Interphase is the longest phase of the cell cycle because:

• Essential proteins are being made for the cell to function

• DNA replication requires time to be accurate

• Organelles like mitochondria are being duplicated

• All are correct

Which enzyme breaks the hydrogen bonds between nitrogen bases to unzip dsDNA during replication?

• DNA polymerase

• Helicase

• Taq polymerase

• Prophase

The main purpose of PCR is:

• Check if you are positive for a virus

• Create new DNA strands

• Amplify sequences of DNA

• See number of cells in mitosis