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Lecture 1

BIOL 3113 Lecture Notes - Lecture 1: Golgi Apparatus, Nuclear Membrane, Mitochondrion


Department
BIOL
Course Code
BIOL 3113
Professor
Barbara S
Lecture
1

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Introduction to Cell Biology
Cells - fundamental units of life
Many types
Variety of sizes, shapes and functions
Three characteristics that define a cell:
1. Replicatable genetic information (DNA)
2. Limiting membrane (plasma membrane)
3. Metabolic machinery (catabolism and anabolism
Cellular Life Forms
Procaryotes
bacteria (eubacteria)
archaea
Eucaryotes
protists
fungi
plants
animals
Procaryotic Cell
Bacteria
* Single compartment enclosed by plasma membrane
* contain essentially no organelles - naked DNA in the
cytoplasm
* Most live as single cell organisms, some form clusters
* Live in variety of environments
* Aerobic and anaerobic
* Food source - any organic material, some bacteria can
live on inorganic substances
Structure of the Eucaryotic Cell
Membrane-bound Compartments and Organelles:
* Plasma membrane - cytosolic compartment
* Nuclear envelope - nucleus - information store
* Endoplasmic reticulum - synthetic machinery
rough (RER)
smooth (SER)
* Golgi apparatus - protein modification, storage, shipment
* Mitochondrion - energy generation
* Chloroplast - capture energy from sunlight
* Lysosome - digestion
* Peroxisome - oxidation
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