quiz 6

Question 1

A karyotype is most like which of the following?

Answer 1

Photographs of every couple at a high school prom.

Question 2

Select the three main stages of the cell cycle.

Answer 2

cytokenises, mitosis,interphase

Question 3

Select the stages of interphase.

Answer 3

g1,s,g2

Question 4

Which option best explains why mitosis alone does not produce daughter cells.

Answer 4

The cell cycle, and thus reproduction, is completed only after cytokinesis occurs.

Question 5

Choose the best answer that describes the events of each stage of mitosis.

Answer 5

Prophase, mitotic spindle form and the centrosomes migrate to opposite sides. Metaphase, the spindle is fully formed, the chromosomes are aligned single file. Anaphase, chromosomes separate from the centermere, driving to arrive at poles. Telophase, a nuclear envelope forms around chromosomes, chromosomes uncoil, and nuceloi reappear.

Question 6

Which answer best contrasts cytokinesis in a plant cell and an animal cell ?

Answer 6

a cell wall forms in between the daughter plant cells;. In animals , this occurs when a cleavage furrow forms

Question 7

Suppose a drug stopped microtubule movement but did not affect cytokinesis. Which answer best hypothesizes the impact of the drug if it was applied to a cell?

Answer 7

The drug may lead to inaccurate splitting of chromosomes.

Question 8

If a plant cell completes the cell cycle in 24 hours, how many total cells will be produced in after five days?

Answer 8

32

Question 9

Describe how cyclins play a role in the cell cycle.

Answer 9

Cyclins drive the events of the cell cycle by partnering with a family of enzymes called the cyclin-dependent kinases (CDKs).

Question 10

Which option explains how the cancer cell cycle is different from a normal cell cycle?

Answer 10

Instead of dying, cancerous cells multiply and continue to reproduce other abnormal cells.

Question 11

Which of the following accurately describes the effects of carcinogens

Answer 11

Carcinogens lead to damage to genetic material, which may lead to uncontrolled cell division.

Question 12

If S phase was eliminated from the cell cycle, the daughter cells would:
Correct!

Answer 12

have half the genetic material found in the parental cell.

Question 13

Which of the following help maintain the structure of chromosomes and control the activity of genes?

Answer 13

proteins

Question 14

Which of the following explains the difference between embryonic stem cells and adult stem cells?

Answer 14

Adult stem cells are more limited in what cell types they can develop in to.

Question 15

What is the role of cyclins in a cell?

Answer 15

To signal for the cell to divide

Question 16

Describe how stem cells might be used to help a patient who has a damaged spinal cord.

Answer 16

tem cells may develop into new spinal cord cells.

Question 17

Explain how the lack of cyclins would affect the cell cycle.

Answer 17

This would lead to uncontrollable cell division.

Question 18

To which structure does the arrow in the diagram point?

1E6F9D45-D233-43D0-A255-ACD5C05C6663.jpeg

Answer 18

Spindle

Question 19

What are the structures projecting from the cells in the diagram?

E59E3637-44B3-4D75-A970-5B80D3DBB75E.jpeg

Answer 19

cilia

Question 20

What stage occurred in the area labeled A?

Correct Answer

Answer 20

g stage

Question 21

What process occurred in the area labeled B?

Answer 21

Cytokinesis

Question 22

The cancer drug “Vinblastine” interferes with synthesis of microtubules. In mitosis, this would interfere with what?

Answer 22

Spindle formation

Question 23

Use this hypothetical cell shown to answer the question. Length of the cell shown is 2 cm.

Answer 23

3:1

Question 24

Of the surface area - to - volume ratio, what does the surface area represent in a cell?

Answer 24

Plasma membrane

Question 25

What happens as a cell continues to grow?

Answer 25

A cell’s ratio of surface area to volume will decrease.
Correct!
As a cell grows, its volume increases more rapidly than its surface area.
Correct!
As a cell grows, it may have more difficultly supplying nutrients and expelling enough waste products.

Question 26

Which of the following is a difference between sexual and asexual reproduction?

Answer 26

Sexual reproduction is more likely to increase genetic variation than is asexual reproduction.

Question 27

In what type of cells is the DNA strand wound up in a highly tight coil called a chromosome?

Answer 27

both prokaryotic and eukaryotic cells

Question 28

Nondisjunction occurs when:

Answer 28

members of a chromosome fail to separate.

Question 29

Independent orientation of chromosomes at metaphase I results in an increase in the number of

Answer 29

possible combination of characteristics

Question 30

Which of the following is a difference between mitosis and meiosis?

Answer 30

All of the choices are correct.