9.4

A certain species of animal has six pairs of chromosomes. How many DNA molecules are present in the nuclei of these animals during G2 phase?

24

Which of the following checkpoints does not occur late in G1?

A check that chromosome replication has been successfully completed

Which of the following is NOT correct?

Cytokinesis is a part of mitosis

Which of these phases encompasses all of the stages of mitosis but no other events?

E This is mitosis

Cytokinesis takes place during metaphase.

False

During which phase of the eukaryotic cell cycle do growth and nutrient acquisition occur?

G1 phase of interphase

The interval before the onset of DNA replication is

G1 stage

Which of the following is the correct sequence of stages in the mitotic cell cycle that produces a differentiated cell? (D = cell differentiation)

G1, S, G2, M, D

Beginning with a newly formed daughter cell, what is the order of the other stages of the eukaryotic cell cycle?

G1, S, G2, Mitosis

Which of the following is the proper sequence for mitosis (I. metaphase, II. telophase, III. prophase, IV. anaphase)?

III, I, IV, II

Cells spend most of their time in what phase?

Interphase

During _____ the cell grows and replicates both its organelles and its chromosomes.

Interphase

Four of the five answers listed below are stages of actual nuclear division. Select the exception.

Interphase

The chromosomes and genes are actually replicated during

Interphase

At what phase in the cell cycle does DNA replication occur?

S phase

Chromosomes are duplicated during what portion of the cell cycle?

S phase

During which phase of the eukaryotic cell cycle does DNA and chromosome replication occur?

S phase of interphase

True or false. Mitosis takes place during M phase of the cell cycle, which is longer than interphase.

false Mitosis does indeed take place during M phase, but M phase is shorter than interphase; cells spend most of their time in interphase.

The two main stages of the cell cycle are called

mitosis and interphase

During _____ both the contents of the nucleus and the cytoplasm are divided.

mitotic phase

Mitosis is division of the ________, whereas cytokinesis is division of the ________.

nucleus and cytoplasm

During which phase do chromosomes first become visible?

prophase

Chromosome replication takes place during interphase.

Trueq

Which of the following organisms does NOT reproduce its cells by mitosis and cytokinesis?

bacterium

The repeating sequence of cells dividing, growing, and dividing again is called

cell cycle