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week 3 ( module 13)

by: Snehi Christian

week 3 ( module 13) BIO 150

Marketplace > Biology > BIO 150 > week 3 module 13
Snehi Christian


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About this Document

Introduction to Biology
Bethany Bowling
Class Notes
Biology, cells
25 ?




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This 2 page Class Notes was uploaded by Snehi Christian on Wednesday January 27, 2016. The Class Notes belongs to BIO 150 at a university taught by Bethany Bowling in Winter 2016. Since its upload, it has received 21 views.

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Date Created: 01/27/16
Week 3 notes: Module 13: Cells Cell Theory: 1. Cells are the basic unit of life. All life is composed of at least one or more cells. 2. Cells come from the pre-existing cells. DNA is dived and replicated to form a new cell from old cells. Cell size – less than 100 microns All cells have DNA except RBC (eukaryotes) All cells have Ribosomes which are made up of RNA & protein. Their function is protein synthesis and production of polypeptides. Two main types of cells Prokaryotic and eukaryotic cells. Prokaryotic Cells Eukaryotic Cells Has a nucleotide to store DNA Has a membrane bound Nucleus to store DNA Single Celled Has a endomembrane system composed of endoplasmic reticulum (rough & smooth) and the golgi apparatus. Do not have special tissue ex. Muscle Has membrane bound organelles such as tissue Nucleus, vacuole , mitochondria , chloroplast. No membrane bound organelles are present Has a flagellum for movement Has a Pilus which is used for exchange of genetic material such as plasmids Has a Fimbriae which is used for attachment. Glycocalyx (capsule) – layer of carbohydrates, protects the immune system. Used by dentist during tubing Cytoplasm- the semifluid matrix inside the cells. Plasma membrane – Lipid bilayer, all cells have this to which allows waste material and nutrients to pass through the cells. There are 3 main cell domains: 1. Bacteria- Gram +ve and Gram –ve. Peptidoglycan is present in the cell wall. 2. Archaea- It a membrane lipid having a monolayer. Pseudomurein is present in cell wall. Can survive in extreme environments. 3. Eukarya-


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