Cell Growth
This molecule contains the instructions that control a cell's activities.
What is DNA?
The process that ensures two daughter cells are genetically identical to the parent cell.
What is mitosis?
Cells stop dividing when they come into contact with this.
What is neighboring cells?
The two events that make up the M phase of the cell cycle.
What is are mitosis and cytokinesis?
This phase accounts for most of a cell's life and includes growth, DNA replication, and preparation for cell division.
What is interphase?
The two major problems caused by cell growth are 1) difficulty exchanging materials across the cell membrane, and 2) this.
What is DNA overload?
The event that directly follows the separation of sister chromatids.
What is movement toward opposite poles of the cell (anaphase)?
These proteins regulate the timing of the cell cycle.
What are cyclins?
If ca cell is actively synthesizing DNA, it is in this stage of interphase.
What is the S Phase?
A chromosome has just been replicated. At this point, it consists of these structures joined together by a centromere.
What are two sister chromatids?
The ratio comparing a cell's surface area to its volume becomes smaller as the cell does this.
What is grows?
A scientist observes chromosomes lined up across the center of a cell. The cell is in this stage of mitosis.
What is metaphase?
Before mitosis begins, internal regulators check that this cellular material has been copied correctly.
What is DNA?
The spindle fibers would most directly affect this process during mitosis.
What is the movement and separation of chromosomes/chromatids?
Plant cells form this instead of simply pinching off.
What is a cell plate?
This characteristic determines how quickly materials can move into, out of, and around a cell.
What is surface area?
If cytokinesis occurred before mitosis was completed, this problem would likely result.
What is daughter cells receiving incomplete or unequal genetic material?
This gene normally prevents damaged cells from continuing through the cell cycle.
What is p53?
A cell has damaged DNA but continues dividing. Which regulatory system most likely failed?
A cell with an intact nucleus and uncondensed chromatin is most likely in this stage of the cell cycle.
What is interphase?
A cube shaped cell measuring 3 cm on each side has this surface area to volume ratio.
What is 2:1?
Surface Area - 3 cm x 3 cm = 9 cm
9 cm x 6 faces = 54 cm^2
Volume: 3 cm x 3 cm x 3 cm = 27 cm^3
54/27 = 2:1
A cell contains 46 chromosomes at the start of mitosis. After DNA replication but before anaphase, how many chromosomes are there in the cell?
What is 46 chromosomes. Remember that both the original and replicated chromatids are combined together at the centromere. They haven't changed. This is why some people say chromosomes are one strand and some say two strands.
Cancer is considered a disease of the cell cycle because this normal process has broken down.
What is the regulation/control of cell division?
The breakdown of nuclear envelope during prophase allows this important event to occur.
What is spindle fibers gaining access to chromosomes?
A scientist removes a strip of cells from a petri dish. The surrounding cells do what?
Why do the cells begin dividing again?