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Biology Ch. 10
Terms in this set (45)
As a cell becomes larger, its...
Volume 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...
The rate at which wastes are produced by a cell partially depends on the cell's...
Is excess oxygen a problem that growth causes for cells?
Compared to small cells, large cells have more trouble...
Moving needed materials in and waste products out
After cell division, each daughter cell has...
A higher surface area/volume ratio than a parent cell
What happens when a cell divides?
Each daughter cell receives its own copy of the parent cell's DNA
The process by which a cell divides into two daughter cells is called...
An advantage of sexual reproduction over asexual reproduction is that sexual reproduction...
Provides genetic diversity
What is an advantage of having the cell's DNA bundled into separate chromosomes?
During cell division, each daughter cell will get the same number of genes
List the structures of DNA from smallest to largest.
Double helix, nucleosome, coil, supercoil, and chromosome
A multicellular organism begins life as a single cell - a fertilized egg with a complete set of chromosomes. An example is when a cell divides to become two cells, then four cells, eight cells, and so on. Give a statement that best describes what happens during this process.
Chromosomes are duplicated before cell division so that each new daughter cell has a complete set
When during the cell cycle are chromosomes visible?
Only during cell division
During what phase in the cell cycle does mitosis happen?
What pair includes a phase of the cell cycle and a cellular process that occurs during that phase?
G2 phase, preparation for mitosis
When during the cell cycle is a cell's DNA replicated?
What event occurs during interphase?
State a correct statement about the events of the cell cycle
Interphase consists of the G1, S, and G2 phase
On a scale from A to D, what would cell division be?
In Figure 10-4, what role does the structure A play in mitosis?
Connect to spindle fibers
The structure labeled A in Figure 10-5 is called the...
The structure labeled B is called...
During what phase(s) of mitosis are structures like the one shown in Figure 10-5 (centromere, and sister chromatids) visible?
Prophase, metaphase, and anaphase
Name a phase of mitosis
The first phase of mitosis is called...
During what phase of mitosis do the chromosomes line up along the middle of the dividing cell?
List the phases 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 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...
One difference between cell division in plant cells and in animal cells is that plant cells have...
A cell plate
Some cells form a cell plat during cytokinesis. Which of the following is true of the cells in Figure 10-6 above?
Only cell B forms a cell plate during cytokinesis
When cells are grown in a laboratory, which of the following is a factor that can stop normal cells from dividing?
Contact with other cells
Cells grown in a petri dish tent o divide until they form a thin layer covering the bottom of the dish. If cells are removed from the middle of the dish, the cells bordering the open space will begin dividing until they have filled the empty space. What does this experiment show?
The controls on cell growth and division can be turned on and off
Explain why normal cells grown in a petri dish tend to stop growing once they have covered the bottom of the dish?
Contact with other cells stops cell growth
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 an 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 genes is likely to...
Stop responding to growth regulators
Multicellular organisms only
During early development, all cells in the embryo of a multicellular organism are identical. Later on in 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
What is a possible future benefit of stem cell research?
Reversing damage from a heart attack
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