Unit 2 Test

Front

What type of bond joins nitrogenous bases in DNA?

Back

Hydrogen bonds are the type of bond that joins nitrogenous bases in DNA.

Front

True or False: Cell division helps repair damaged tissue.

Back

True. When cells divide, they help to repair damaged tissue in the body.

Front

What is the next phase of mitosis after anaphase?

Back

The next phase of mitosis after anaphase is telophase.

Front

What enzyme unwinds DNA for replication?

Back

The enzyme that unwinds DNA to prepare for replication is helicase.

Front

What is the division of the nucleus called?

Back

The division of the nucleus is known as mitosis.

Front

Define mitosis.

Back

Mitosis is the process of cell division that results in two genetically identical daughter cells.

Front

What is the role of helicase in DNA replication?

Back

Helicase unwinds the DNA double helix, separating the two strands to allow replication.

Front

List the phases of mitosis in order.

Back

The phases of mitosis in order are prophase, metaphase, anaphase, and telophase.

Front

What happens during telophase?

Back

During telophase, the chromosomes de-condense, and the nuclear envelope re-forms around each set of chromosomes.

Front

What is the significance of hydrogen bonds in DNA structure?

Back

Hydrogen bonds between nitrogenous bases hold the two strands of DNA together, allowing for the double helix structure.