Cell Growth
The rate at which materials enter and leave through the cell membrane depends on the cell’s
a. volume.
b. weight.
c. mass.
d. surface area.
Sister chromatids are attached to each other at an area called the
a. Centriole.
b. Centromere.
c. Spindle.
d. Chromosome.
b. Centromere.
The timing of the cell cycle in eukaryotic cells is believed to be controlled by a group of closely related proteins known as
a. Chromatids.
b. Cyclins.
c. Centromeres.
d. Centrioles.
b. Cyclins.
The process of cell division results in
a. Sister chromatids.
b. Mitosis.
c. Two daughter cells.
d. Unregulated growth.
c. Two daughter cells.
If a cell has 12 chromosomes, how many chromosomes will each of its daughter cells have after mitosis?
a. 4
b. 6
c. 12
d. 24
c. 12
In the cell cycle, external regulators direct cells to
a. Speed up or slow down the cell cycle.
b. Remain unchanged.
c. Proceed and then stop the cell cycle.
d. Grow uncontrollably
a. Speed up or slow down the cell cycle.
Summarize what happens during the process of cell division.
A cell divides into two new daughter cells.
At the beginning of cell division, a chromosome consists of two
a. Centromeres.
b. Centrioles.
c. Chromatids.
d. Spindles.
c. Chromatids.
Uncontrolled cell division occurs in
a. cancer.
b. mitosis.
c. cytokinesis.
d. cyclin.
a. cancer.
The DNA grows with the cell as the cell grows. True or False.
False
The phase of mitosis during which chromosomes become visible and the centrioles separate from one another is
a. Prophase.
b. Anaphase.
c. Metaphase.
d. Telophase.
a. Prophase.
Cyclins regulate the timing of the cell cycle in eukaryotic cells. True or False.
True
__________ __________ is the amount of material inside the cell. ___________ ______________ _____________ is the total area of the cells membrane.
Cell Volume and Cell Surface Area.
Together, interphase and cell division make up the cell cycle. True or False.
True
Why is it important that cell growth in multi-cellular organism be regulated so carefully?
The consequences of uncontrolled cell growth are severe, as in cancer, for example.