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Biology Chapter 11- Cell growth and Division
This quiz focuses on mainly on studying and learning all about cell growth and the many factors and benifits. Test on Wednesday.
Terms in this set (31)
What are 2 problems cells encounter as they become larger?
There is a information crisus and DNA is overloaded. There is a traffic problem when the materials can not get to the cells.
What is cell division?
Cell division is a process when cells must produce two new daughter cells.
Before cell division can take place what must happen to the DNA in the cell?
Before cell division takes place the DNA must replicate.
Define asexual reproduction.
Asexual reproduction is is when a single parent produces genetically identical offspring.
Define sexual reproduction
Sexual reproduction involves the fusion of two seprate parent cells.
Compare asexual reproduction to sexual reproduction (make a slide for each)
Sexual reproduction- Fewere off springs which means there is less off springs.
Asexual reproduction does not need a parent cell but produces identical offspring.
It is a tread like string and has long strands of DNA.
How many chromosomes do prokaryotic cells have?
How many chromosomes do eukaryotic cells have?
46 chromosomes and there are many chromosomes.
Define cell cycle
The cell cycle is the series of events that take place in a cell that cause that cause the cell to to divide into two daughter cells.
What stages occur during prokaryotic cell division?
How is the eukaryotic cell cycle different from the prokaryotic cell cycle? (it is more complex with more stages involved)
For starters prokaryotic cells are more complex with more stages involved.
the resting phase between successive mitotic divisions of a cell, or between the first and second divisions of meiosis.
What are the 3 stages of interphase? Describe what happens during each stage (make a separate slide for each)
G1- Phase of cell growth
S- DNA replicates
G2- Preparation of mitosis
a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
What are the 4 phases of mitosis? Describe what happens during each stage ( separate slide for each)
Metaphase- Chromosomes line up at the middle of the cell.
Chromosomes become visable, nuclear envelop dissolves, spindle forms
Chromosomes move toward opposite poles.
The cell begins to divide into daughter cells.
Cytokinesis- In animal cells- the cell membrane pinches in the center to form two daughter cells.
In animal cells- The cell plate that divides the cell in two.
the cytoplasmic division of a cell at the end of mitosis or meiosis, bringing about the separation into two daughter cells.
How is cytokinesis different in plant cells than in animal cells?
In plant cells there are two parent cells.
what is cytoknesis like in animal cells?
a ring of actin filaments forms at the metaphase plate. The ring contracts, forming a cleavage furrow, which divides the cell in two. .
What are cyclins?
proteins that regulate the cell cycle
Describe the role of internal cyclins?
They control the inside of the cell.
What is the role of external cyclins?
The main role is to tell the inner part of the cell where the break or cut is and to tell the cell to start fixing the cell.
What is apoptosis?
process of programmed cell death were the cell self destructs it's self.
What is cancer?
uncontrolled cell growth
How is cancer treated?
surgery, radiation, chemotherapy
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