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Bio 10.2 and 3
Terms in this set (45)
When cells are grown in a laboratory, which is a factor that can stop normal cells from dividing?
Contact with other cells
In eukaryotic cells, the timing of the cell cycle is regulated by
cyclins are a family of closely related proteins that
regulate the cell cycle
What is a external regulator of the cell cycle
cancer is a disorder in which some cells have lost the ability to control their
cancer cells form masses of cells called
a cell with a defective p53 gene is likely to
stop responding to grrowth regulators
during early development, all cells in the embryo of a multicellular organism are indentical. later on development the cells will become specialized through a process called
why are stem cells important
they have the potential to develop into other cell types
which of the following is a possible future benifit of stem cel researc
reversing damage from a heart attack
nerve cells are cells that have_____ undergone differentiation
stem cells taken from embryos are _____potent...
During normal development, the cells between toes and fingers die by__________ a process of programmed cell death
harvesting_____ stem cells from a willing donor is not as controversial as harvesting techniques taht involve the destruction of an embryo
As a cell becomes larger its...
Volue increases faster than its surface area
if the surface area of a cell that is shaped like a cube increases 100 times, its volume increases about
What are problems that growth casuses for cells
(remember excess oxygen is not a problem)
more demands on DNA
obtaining enough food.
compared to small cells, large cells have more trouble
moving needed materials in waste products out
after cell division, each daughter cell has
a higher surface area/volume ratio than the parent cell.
a multicellular organism begines life as a fertilized egg ends in multicellular organsim what best describes what happens during this process?
chromosomes are duplicated before cell division so that each new daughter cell has complete set.
which includes a phase of the cell cycle and a cellular process taht occurs during that phase?
G2 phase, preperation for misosis
when during the cell cycle is a cell's DNA replicated
(ref. #9) In the figure of an animal cell what role does structure A play in mitosis
Connect to spindle fibers
(ref. #10) the structure labeled in A in the figure
(#11) the structures labeled in B are called...
during which phase(s) fo mitosis are structures like the one shown in the last figure visible?
Prophase, Metaphase and Anaphase
One difference between cell division in the plant cells and in animal cells is tha tthe plant cells have
A cell plate
the process by which a cell divides into ttwo daughter cells is called
an advantage of sexual reproduction over asexual reproduction is that sexual reproduction
Provides genetic diversity
which of the following is a correct statement aobout the events of the cell cycle
Interphase consists of the G1, S, and G2 Phases.
(#17) Cell division is represented in the figure by letter
The first phase of mitosis is called
during which phase of mitosis do the chromosomes line up along the middle of the dividing cell
What represents teh phase of mitosis in their proper sequence?
Prophase, metaphase, anaphase, telophase
What is the role of the spindle fibers during mitosis
They help separate the chromosomes
The two main stages of the cell division are called
Mitosis and cytokinesis
During normal mitotic cell division, a parent cell that has four chromosomes will produce two daughter cells, each containing......
(#24)The structure shown is a ?
The_______ a cell is, the more difficult it is for the cell to move enough nutrients and wastes across its cell membrane to maintain its normal functions.
In eukarotes, the _______ breaks down durin prophase and reforms during telophase
typically, the longest phase of mitosis is ________
(#28)The cell shown in step E is gowing through____phase
the number of sister chromatids in a human body cell that is entering cell division is __
A cell that has 5 chromosomes in the G1 Phase will have __ chromatids in the G2 phase.
(#31) The structure labled A is called teh._____ ____.
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