Unit 4 Review A

Front

What is the role of chemical signals in the cell cycle?

Back

Chemical signals in the cytoplasm control the progression of a cell through different phases of the cell cycle, including the transition to the M phase.

Front

What happens when a G1 cell fuses with a cell in early M phase?

Back

The fusion results in the condensation of chromatin in preparation for nuclear division in both cells.

Front

What are the base pairing rules in DNA?

Back

A pairs with T with 2 hydrogen bonds, and G pairs with C with 3 hydrogen bonds.

Front

Which enzyme breaks the hydrogen bonds between nucleotides?

Back

Helicase is responsible for breaking the hydrogen bonds between nucleotides during DNA replication.

Front

What is the function of DNA ligase?

Back

DNA ligase is responsible for joining Okazaki fragments during DNA replication.

Front

What is the correct order of processes in the cell cycle?

Back

The correct order is Interphase, Prophase, Prometaphase, Metaphase, Anaphase, Telophase, Cytokinesis.

Front

Define Interphase in the cell cycle.

Back

Interphase is the phase of the cell cycle where the cell prepares for division, including DNA replication and growth.

Front

What occurs during Prophase?

Back

During Prophase, chromatin condenses into visible chromosomes, and the nuclear envelope begins to break down.

Front

What is the significance of Metaphase?

Back

In Metaphase, chromosomes align at the cell's equatorial plane, ensuring proper separation during anaphase.

Front

What happens during Anaphase?

Back

During Anaphase, sister chromatids are pulled apart to opposite poles of the cell.