Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

DNA replication produces two identical DNA molecules, called ________, which separate during mitosis.

Sister chromatids

After chromosomes condense, the _______ is the region where the identical DNA molecules are most tightly attached to each other.


During mitosis, microtubules attach to chromosomes at the ______.


In dividing cells, most of the cell's growth occurs during what phase?


The ____ ______ is a cell structure consisting of microtubules, which forms during early mitosis and plays a role in cell division.

Mitotic Spindles

During interphase, most of the nucleus is filled wit ha complex of DNA and protein in a dispersed form called _____.


In most eukaryotes, division of the nucleus is followed by _______, when the rest of the cell divides.


The _____ are the organizing centers for microtubules involved in separating chromosomes during mitosis.


What is the first step in preparing for division?

Replication of DNA in the S phase.

What phase do the centrosomes replicate?

G2 phase

What main processes occur within prophase?

Tubulins assemble into spindle microtubules and the cohesins join sister chromatids of duplicated chromosome.

What main processes occur within prometaphase?

Microtubules attach to kinetochores.

What main processes occur within metaphase?

Kinetochores are motionless in relation to poles of cell.

What main processes occur within anaphase?

Cohesins break down and kinetochores move toward poles of cell.

What main processes occur within telophase?

Spindle microtubules disassemble.

What happens to the length of the mitotic spindles during prophase?


During anaphase, the nonkinetochore microtubules _______ and move past each other, and the kinetochore microtubules _______

Lengthen; shorten

During telophase, the nonkinetochore microtubules _________.


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

The mitotic phase

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


Which of these are carcinogens?

UV light, cigarette smoke, testosterone, fat

_____ is a carcinogen that promotes colon cancer.


Nucleoli are present during which phase?


Cytokinesis often, but not always, accompanies _____.


Centromeres divide and sister chromatids become full-fledged chromosomes during _____.


Spindle fibers attach to kinetochores during _____.


What happens during anaphase?

During anaphase centromeres come apart, and sister chromatids become full-fledged chromosomes, which migrate to opposite poles of the cell.

In animal cells, what forms before cytokinesis?

Cleavage furrow

What phase do chromosomes align on the metaphase plate?


What happens during prometaphase?

The spindle fibers attach to the kinetochores

True or False: The nuclear envelope disintegrates before the start of mitosis.


True or false? Mitosis takes place during M phase, which is the longest phase of the cell cycle.


Which term describes two recently replicated DNA strands that are joined together just before cell division?

Sister Chromatids

During which stage of mitosis are chromosomes lined up in the center of the cell?


Which stage of mitosis is characterized by the disintegration of mitotic spindles and the formation of two new nuclear membranes?


To which part of the centromere do mitotic spindle fibers attach during prometaphase?


During which substage of mitosis do sister chromatids break apart and start moving to opposite poles of the cell?


Which of the following is a function of the S phase in the cell cycle?

The synthesis of sister chromatids

The copying of chromosomes occurs during which of the following phases of the cell cycle?

S phase

For the first several divisions of early frog embryos, cells proceed directly from the M phase to the S phase and back to M without gaps. Which of the following is likely to be true about dividing cells in early frog embryos?

The cells get smaller with each generation

True or false? The M phase is characterized by the replication and division of a cell's chromosomes.


If an organism normally has 34 chromosomes, how many molecules of DNA should there be in the G1 phase of the cell cycle?


Which of the following events would cause the cell cycle to arrest?

Poor nutrient conditions

What is cancer?

abnormal or uncontrolled division of cells

What is a lymphocyte?

a type of white blood cell involved in the immune response

Through a microscope, you can see a cell plate beginning to develop across the middle of a cell and nuclei forming on either side of the cell plate. This cell is most likely

A plant cell in the process of cytokinesis

Vinblastine is a standard chemotherapeutic drug used to treat cancer. Because it interferes with the assembly of micro-tubules, its effectiveness must be related to

Disruption of mitotic spindle formation

`The decline of MPF activity at the end of mitosis is due to

The degredation of cyclin

In the cells of some organisms, mitosis occurs without cytoki-nesis. This will result in

cells with more than one nucleus

Which of the following does not occur during mitosis?

Replication of the DNA

A particular cell has half as much DNA as some other cells in a mitotically active tissue. The cell in question is most likely in


Which statement provides the best description of the interphase portion of the cell cycle?

During interphase, a cell is metabolically active

What is true of all cancers?

They have escaped normal cell cycle controls

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording