BIOB10H3 Chapter Notes -Cell Theory, Opata Language, Cyanobacteria

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Published on 17 Dec 2010
School
UTSC
Department
Biological Sciences
Course
BIOB10H3
Professor
Introduction of cell biology. Lecture 1
Early History of the Microscope
Robert Hooke
Compound Microscope (the double lens)
•1665
examined a cork from a tree and saw its cell, seeing the honey combs
called the honeycomb pores CELLS, but really saw empty cell walls of a dead plant
Discovery of cell usually generated to him
Anton Van Leeuwenhoek
for 50 years sent letters to the royal society about his microscopic findings in London
was the first to examine a drop of pond water under a microscope
Observed ANIMALCULES (they darted back and forth under the microscope)
•1665-1675
single lens, The BICONVEX LENS, magnifying 270 times.
Matthias schleiden (1838-Botanist) =believed that even though there are distinctive tissues, Plants consisted of cells and that it
arose from a single cell
Theodor Schwann (colleague of Schleiden and a German Zoologist, 1839) = published a report stating that cells of plants and
animals are the same in structure and came up the 2THEORIES
All organisms have one or more cells
Cells are the structural unit of life (they make up a tissue then an organ then the human being)
Rudolf Virchow (1855) = German Pathologist, came up with the third cell theory (tenant)
Cells arrive or become through division of pre-existing cells.
Basic Properties of All Cells.
Cells are highly Complex:
Order and consistency (like a machine or military)
The more complex, the greater the number of parts that HAS to be in its right place
more regulated (Controlled) to maintain the system, Less tolerance for error
e.g.: DNA duplication = error (1 in 10 million), quickly corrected by repair mechanisms.
Complex and organized
each type of cell has a specific consistent appearance/particular shape and position
note that chemical processes such as protein synthesis are similar in all living organisms
Cells possess Genetic program and the means to use it
There is specific information that is encoded from a
collection of genes to make organisms.
There are TONS of information (zillions) and they are packaged
away into set of chromosomes.
Genes = blueprints
= the director of what goes on in the cell
Because of the Genes molecular structure, this can allow the
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Document Summary

Matthias schleiden (1838-botanist) =believed that even though there are distinctive tissues, plants consisted of cells and that it arose from a single cell. Theodor schwann (colleague of schleiden and a german zoologist, 1839) = published a report stating that cells of plants and animals are the same in structure and came up the 2theories. Cells are the structural unit of life (they make up a tissue then an organ then the human being) Rudolf virchow (1855) = german pathologist, came up with the third cell theory (tenant) Cells arrive or become through division of pre-existing cells. = the director of what goes on in the cell. Because of the genes molecular structure, this can allow the www. notesolution. com genes creates biological evolution. : transcription of genes from dna to translation of rna to create protein (genes to proteins) to mutate and can create variations of organism, which. Information to build a cell is in a gene.