Question 10
A microscope image of a cell in interphase is treated with dyes to stain the nucleic acids (DNA and RNA). This image probably displays ______.
visible nucleoli
separate visible chromosomes
visible spindle fibers
1 points
Question 11
To observe plant cells undergoing mitosis, the best plant tissue to isolate would be ______.
a section of the root tip
a section of the mature fruit
a section of the main stem
1 points
Question 12
Owen observes a slide containing whitefish blastula sections. He finds a cell with visible spindle lines extending from two points on opposite sides of the cell and chromosomes as small black Xs halfway between the two poles. What stage of the cell cycle is Owen observing?
anaphase
metaphase
prometaphase
1 points
Question 13
What structural feature can you use to distinguish between DNA-stained onion cells in anaphase and telophase?
Sister chromatids separate as anaphase ends and telophase begins.
The vesicles forming a cell plate appear around the onset of telophase.
The chromosomes are clustered at visible spindle poles during anaphase.
1 points
Question 14
A carcinogen is any substance or environmental condition that ______.
increases the frequency of mutation
causes direct damage to DNA
inhibits mitosis in cancer cells
1 points
Question 15
Angelina observes a slide containing whitefish blastula sections. She finds a cell with visible spindle lines extending from two points on opposite sides of the cell and chromosomes as small black Xs halfway between the two poles. What intracellular structure forms each of the two points on opposite sides of this cell?
a metaphase plate
a cell plate
a pair of centrioles
1 points
Question 16
Which of the following best describes the relationship between interphase and the cell cycle?
Interphase is a gap between rounds of cell division.
Interphase comprises a large majority of the cell cycle in almost all cells.
Interphase comprises a large majority of the cell cycle in slowly and non-dividing cells.
Question 17
Radiation therapy and chemotherapy are cancer treatments that primarily attack cancer cells through ______.
activating apoptosis in any rapidly dividing cells to kill off tumor cells
destroying the blood vessels in cancerous tumors to block the flow of nutrients
damaging DNA to the extent that cells die if they cannot repair the damage
Question 10
A microscope image of a cell in interphase is treated with dyes to stain the nucleic acids (DNA and RNA). This image probably displays ______.
visible nucleoli | ||
separate visible chromosomes | ||
visible spindle fibers |
1 points
Question 11
To observe plant cells undergoing mitosis, the best plant tissue to isolate would be ______.
a section of the root tip | ||
a section of the mature fruit | ||
a section of the main stem |
1 points
Question 12
Owen observes a slide containing whitefish blastula sections. He finds a cell with visible spindle lines extending from two points on opposite sides of the cell and chromosomes as small black Xs halfway between the two poles. What stage of the cell cycle is Owen observing?
anaphase | ||
metaphase | ||
prometaphase |
1 points
Question 13
What structural feature can you use to distinguish between DNA-stained onion cells in anaphase and telophase?
Sister chromatids separate as anaphase ends and telophase begins. | ||
The vesicles forming a cell plate appear around the onset of telophase. | ||
The chromosomes are clustered at visible spindle poles during anaphase. |
1 points
Question 14
A carcinogen is any substance or environmental condition that ______.
increases the frequency of mutation | ||
causes direct damage to DNA | ||
inhibits mitosis in cancer cells |
1 points
Question 15
Angelina observes a slide containing whitefish blastula sections. She finds a cell with visible spindle lines extending from two points on opposite sides of the cell and chromosomes as small black Xs halfway between the two poles. What intracellular structure forms each of the two points on opposite sides of this cell?
a metaphase plate | ||
a cell plate | ||
a pair of centrioles |
1 points
Question 16
Which of the following best describes the relationship between interphase and the cell cycle?
Interphase is a gap between rounds of cell division. | ||
Interphase comprises a large majority of the cell cycle in almost all cells. | ||
Interphase comprises a large majority of the cell cycle in slowly and non-dividing cells. |
Question 17
Radiation therapy and chemotherapy are cancer treatments that primarily attack cancer cells through ______.
activating apoptosis in any rapidly dividing cells to kill off tumor cells | ||
destroying the blood vessels in cancerous tumors to block the flow of nutrients | ||
damaging DNA to the extent that cells die if they cannot repair the damage |