Question 1

The ________ of an organism is its complete collection of genetic information.

Accepted Answer

The answer of The ________ of an organism is its...

Question 2

During the cytokinesis phase of cell division,plant cells develop a cell plate instead of a cleavage furrow.

Accepted Answer

During cytokinesis in plant cells, a cell plate forms instead of a cleavage furrow to divide the cell into two daughter cells.

Question 3

At several points in the cell cycle there are checkpoints that control the cell's passage from one phase to the next.If a cell receives a signal at each checkpoint,it continues to the next phase; if it does not receive the signal,the cell does not continue.For example,a growth factor may stimulate a cell to move from G₁ into S phase.If no growth factor is present,the cell cycle stops in G₁ and the cell does not divide.Predict what would happen to a cell and to a multicellular organism if there was a defect at the checkpoint and the cell continued through the cell cycle even in the absence of a signal.

Accepted Answer

The answer of At several points in the cell cycle...

Question 4

The ________ is a microtubule structure that binds to sister chromatids to separate them in anaphase.

Accepted Answer

The answer of The ________ is a microtubule structure that...

Question 5

Bacterial binary fission is essentially the same process as mitosis in animals and plants.

Accepted Answer

Bacterial binary fission involves simple division of a single cell into two identical daughter cells without involving the complex steps of mitosis seen in eukaryotic cells.

Question 6

The sequence of events from the birth of a cell to when it divides describes the ________.

Accepted Answer

The answer of The sequence of events from the birth...

Question 7

In cell division,the separation of the cell's cytoplasm to produce two daughter cells is ________.

Accepted Answer

The answer of In cell division,the separation of the cell's...

Question 8

In cell division,the separation of duplicated chromosomes is ________.

Accepted Answer

The answer of In cell division,the separation of duplicated chromosomes...

Question 9

Each phase of the cell cycle takes a different amount of time for a cell to complete.The longer the length of the phase,the more likely you will find a cell in that phase.You are looking at some animal cells under the microscope,and you see cells at different phases of the cell cycle.You count how many are in each phase and find out that 90 percent are in interphase,6 percent are in prophase,1.5 percent are in metaphase,0.5 percent are in anaphase,and 2 percent are in telophase.If the length of the cell cycle is 24 hours,how long does it take for the cells to go through each of these phases of the cell cycle?

Accepted Answer

The answer of Each phase of the cell cycle takes...

Question 10

Human skin cells and human white blood cells of the immune system both perform protective functions.Skin cells function primarily in external physical protection,whereas white blood cells function primarily in internal protection.Nonetheless,both types of cells contain a complete copy of the human genome.Explain how cells can have the same genetic information and yet perform different functions.What prevents skin cells from making all the same proteins of a white blood cell?

Accepted Answer

The answer of Human skin cells and human white blood...

Question 11

You are a physician treating a patient with cancer.Traditional chemotherapy has not been working on this patient,so you prescribe a new class of drugs called taxanes,which inhibit microtubule function.Your patient asks you how they work.How would you explain to your patient how these drugs work?

Accepted Answer

The answer of You are a physician treating a patient...

Question 12

During which phase of mitosis are the chromosomes aligned along the equator of the cell? Predict what would happen if a cell completed mitosis without first lining up all the chromosomes in the middle of the cell.

Accepted Answer

The answer of During which phase of mitosis are the...

Question 13

Refer to the figure below, and then answer the question that follows.
 
-A cell that no longer needs to divide will remain in G₀ phase.But if an injury occurs to an organ,signals will tell the cell to return to the cell cycle to replace lost or damaged cells.To which point in the cycle will the cell return,and which phase would it enter next?

Accepted Answer

The answer of Refer to the figure below, and then...

Question 14

Refer to the figure below, and then answer the question that follows.
 
-What is the advantage of chromatin coiling and condensing into tight structures before mitosis?

Accepted Answer

The answer of Refer to the figure below, and then...

Question 15

What is the relationship between genes and proteins,including the function of each?

Accepted Answer

The answer of What is the relationship between genes and...

Question 16

List and briefly describe three differences between prokaryotic and eukaryotic cell division.

Accepted Answer

The answer of List and briefly describe three differences between...

Question 17

Match between columns
                        Premises: Microtubules shorten and the genetic material divides
A contractile ring is narrowing along the cell's equator
Chromosomes unwind and new nuclei form
Chromosomes condense and the mitotic spindle begins to form
The nuclear envelope has disappeared completely and sister chromatids are facing opposite poles

Accepted Answer

The Answer of anaphase and prophase and telophase and metaphase is...

Quiz 9: The Links in Lifes Chain: Genetics and Cell Division