Biology 1406 Chapter 9

1. DNA replication produces two identical DNA molecules, called__________, which separate during mitosis

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

3. During mitosis, microtubules attach to chromosomes at the _______.

In dividing cells, most of the cell's growth occurs during _____

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

. During interphase, most of the nucleus is filled with a complex of DNA and protein in a dispersed form called -------

7. In most eukaryotes, division of the nucleus is followed by________, when the rest of the cell divides.

8. The ______are the organizing centers for microtubules involved in separating chromosomes during mitosis.

The cell cycle represents the coordinated sequence of events in the life of a cell from its formation to its division into two daughter cells. Most of the key events of the cell cycle are restricted to a specific time within the cycle. In this exercise, you will identify when various events occur during the cell cycle. Recall that interphase consists of the G1, S, and G2 subphases, and that the M phase consists of mitosis and cytokinesis.

As the chromosomes of a parent cell are duplicated and distributed to the two daughter cells during cell division, the structure of the chromosomes changes.

what phase is this?

What phase is this?

what phase is this

7. In most eukaryotes, division of the nucleus is followed by________, when the rest of the cell divides.

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

what phase is this?

what phase is this?

what phase is this?

During prophase, the microtubules of the mitotic spindle ______.

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

During telophase, the non kinetochore microtubules ______.

Sort each process into the appropriate bin to indicate the stage of mitosis in which it occurs. (Telophase)

Sort each process into the appropriate bin to indicate the stage of mitosis in which it occurs. (anaphase)

Sort each process into the appropriate bin to indicate the stage of mitosis in which it occurs. (metaphase)

Sort each process into the appropriate bin to indicate the stage of mitosis in which it occurs. (pro metaphase)

Sort each process into the appropriate bin to indicate the stage of mitosis in which it occurs. (prophase)

will this cell elongate during mitosis?

Will the chromosomes move to the poles of the cell?

will the sister chromatids separate from each other?

Bacteria only, eukaryotes only, or both. Chromosome separation begins at the origin of replication on DNA.

Bacteria only, eukaryotes only, or both. Nuclear envelope fragments, permitting chromosome separation.

Bacteria only, eukaryotes only, or both. Two copies of the duplicated chromosome are attached at their centromeres before separating.

Bacteria only, eukaryotes only, or both. Before separation, duplicated chromosomes condense.

Bacteria only, eukaryotes only, or both. Chromosomes replicate before cell division.

Bacteria only, eukaryotes only, or both. Replicated chromosomes separate by attaching to some other structural feature of the cell.

Which of the following statements are true of cytokinesis in plant cells? A. The cell plate consists of the plasma membrane and cell wall that will eventually separate the two daughter cells. B. Vesicles from the Golgi apparatus move along microtubules, coalesce at the plane of cell division, and form a cell plate. C.The plasma membrane of the parent cell grows inward, eventually joining with the cell plate. D.After chromosome separation is complete, a network of microfilaments forms near the plane of cell division that will separate the two new cells.

For each space in the table, drag the appropriate label to indicate if the statement is true or false for each group of organisms. Cells divide by constriction of a ring of protein.

For each space in the table, drag the appropriate label to indicate if the statement is true or false for each group of organisms. The presence of a cell wall prevents the cell from dividing by construction.

For each space in the table, drag the appropriate label to indicate if the statement is true or false for each group of organisms. Tubulin or tubulin-like molecules function in binary fission (in bacteria) or cytokinesis (in animals and plants).

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

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

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

Nucleoli are present during _____.

Cytokinesis often, but not always, accompanies _____.

Chromosomes become visible during _____.

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

Spindle fibers attach to kinetochores during _____.

During prophase a homologous pair of chromosomes consists of _____.

Which of these is NOT a carcinogen?UV light A. fat B. testosterone C. cigarette smoke D. all of the above are carcinogens

____ is a carcinogen that promotes colon cancer A. UV light b. estrogen c. a virus D. testosterone E. fat

When cells were first taken from Henrietta Lacks, she was _____.

How did doctors harvest and culture cells from Henrietta Lacks?

Did doctors ask Henrietta Lacks' permission to take her cells, and was she paid for them?

What property of Henrietta Lacks' cells was most unusual when they were grown in the laboratory?

Cells taken from Henrietta Lacks have been used for experiments leading to _____. A.tests of the effects of atomic radiation on life B . new treatments for cancer C. the development of a polio vaccine D. all of the above

When did the United States declare a "war on cancer" by passing the National Cancer Act?

Which of the following is closest to the current average annual death rate from cancer in the United States?

Based on the information in the video, which of the following correctly answers these three question States today? What is predicted to be the leading cause of death in the United States 10 years from now?

Since 1991, deaths from breast and colorectal cancer in the United States are down 35%. What is the main reason for this?

Why is the "personalized care" plan described in the video, in which treatments are tailored for each individual, much more promising than previous treatment plans

Which of the following organisms would be most similar to humans in a study that involved the response of cancer cells to various medications?

Which of the following best describes the advantages of the personalized care technique described in the video?

Which image displays the chromosomal composition of one daughter nucleus at telophase of mitosis?

What is the correct chromosomal condition for a nucleus at prophase of mitosis?

What is the correct chromosomal condition for a nucleus in G1 of the cell division cycle?

If the cell whose nuclear material is shown in the figure continues toward completion of mitosis, which of the following events would occur next?

G1 is represented by which numbered part(s) of the cycle?

In the figure, G1 is represented by which numbered parts of the cycle?

In the figure, DNA synthesis is represented by which numbered parts of the cycle?

In the figure, which number represents the point in the cell cycle during which the chromosomes are replicated?

In the figure, which of the numbered regions would contain cells at metaphase?

In the figure, G2 is represented by which numbered parts of the cycle?

Which of the following is the most plausible explanation for the difference in time spent in S phase by beta and gamma? Cell Type G1 S g2 M Beta 18 24 12 16 Delta 100 0 0 0 Gamma 18 48 14 20

The best conclusion concerning delta is that the cells Cell Type G1 S g2 M Beta 18 24 12 16 Delta 100 0 0 0 Gamma 18 48 14 20