cells increase in size, new organelles are synthesized.
100
The end of mitosis results in
Two identical daughter cells
100
Chromosomes are made up of
2 sister chromatids connected at the centromere.
100
How come when you get a cut on your arm, your skin does just keep growing?
the cells touching one another can signal the need for the cell cycle to slow down.
100
When cells grow uncontrollably, they form...
tumors
200
Which process is longer, mitosis or interphase?
interphase
200
When do chromosomes become visible?
During prophase (only throughout M Phase)
200
There are how many individual chromosomes in an average human?
46
200
What is the name of the cell cycle regulator?
cyclins
200
What happens when a cell continues to grow without division?
information crisis
300
What occurs during the S Phase?
DNA replication (chromosomes replicate)
300
What is happening during Anaphase?
Sister chromatids are being transferred to opposite ends of the cell.
300
What is packed together to make chromosomes?
DNA
300
Name two factors that regulate the timing of the cell cycle.
contact with other cells, cyclins, growth factors, and any other internal or external
300
As a cell becomes larger, its volume increases _________ than its surface area
faster
400
What is the shortest phase in interphase?
G2 phase
400
What organelle is responsible for the spindle fibers?
centrioles
400
Chromosomes are split apart by
spindle fibers
400
what is an example of an external regulator?
wounds
embryotic development.
400
Cancer cells react in which way towards the cell cycle.
Cancer cells have a defect and do not respond to the signals that regulate the growth of most cells.
500
Without interphase, what would happen?
Identical cells would not result as interphase is when all of the replication of organelles and DNA occurs.
500
During telophase, the chromosomes gather at to opposite ends of the cell and lose their distinct shape. What else happens?
the nuclear envelopes will form again.
500
31 haploids make up how many sister chromatids?
62
500
What is p53? Why is it important?
a defect in a gene called p53 which halts the cell cycle – causes the cells to lose the information needed to respond to signals that would normally control their growth.
500
Which of the following is NOT a way that cell division solves the problems of cell growth?
a. Cell division provides each daughter cell with its own copy of DNA.
b. Cell division increases the mass of the original cell.
c. Cell division increases the surface area of the original cell.
d. Cell division reduces the original cell’s volume.
b. Cell division increases the mass of the original cell.