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Cell Cycle and DNA Discoveries
Test on 5/17/19
Terms in this set (34)
An ordered series of events involving cell growth and cell division that produces 2 new daughter cells.
The basic unit of structure and function in living things
Cell growth and normal functions
Cell and nuclear splitting
Division of the cytoplasm during cell division
period of the cell cycle between cell divisions in which the cell grows
Chromosomes become visible, nuclear membrane dissolves, spindle fibers forms
Chromosomes line up in the middle of the cell
Phase of mitosis in which the chromosomes separate and move to opposite ends of the cell
After the chromosome seperates, the cell seals off, Final Phase of Mitosis.
discovered bacterial transformation
Proposed that DNA could transmit disease, not protein & that hereditary material was probably made of DNA, not protein
Hershey and Chase
Used radioactive material to label DNA and protein; infected bacteria passed on DNA; helped prove that DNA is genetic material not proteins
A=T; C=G equal amounts in DNA result in complementary pairs.
Franklin and Wilkins
tried to find DNA structure, produced x-ray crystallography photos of DNA that indicated it was a helix
Watson and Crick
Figured out structure of DNA was a double helix
How is cancer caused?
uncontrolled cell growth and division
a multistep process during which the duplicated chromosomes are aligned, separated, and moved into two new, identical daughter cells.
another term for mitosis
the human body has how many chromosomes?
A threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
Human gametes have how many chromosomes?
known as a diploid or 2n
known as haploids or n
Structure of a chromosome
Each chromosomes is made up of DNA tightly coiled many times around proteins called histones that support its structure.
the regulation of gene expression by the binding of an activator protein to DNA
a repressor protein binds to an operator to prevent a gene from being expressed
Checks the surroundings to make sure the conditions are favorable and the cell is healthy enough to enter the next stage
The cell checks to make sure the DNA is copied correctly
checks for chromosomes attached to the spindle (just before anaphase)
What does the cell cycle prevent?
Mutations that may be passed forward to every new cell produced from an abnormal cell.
a random error in gene replication that leads to a change
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