cells part ii cells ii. cell theory 1. the cell is the smallest unit of life. the cell carries out...
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Cell Theory1. The cell is the smallest unit of life.
The cell carries out all life processes
2. All organisms are made from one or more cells.CellsTissuesOrgansSystemsOrganism
3. Cells arise from pre-existing cells.DNA in each cell contains all the information necessary to produce offspring
All cells have: Cell membrane Surrounds, contains, protects Cytoplasm “Cell gel” fills interior of cell Ribosomes Help make proteins for cells DNA Contains instructions for cell
Two Categories of Cells Prokaryotes “Before” nucleus Simple structure Bacteria Archaebacteria
Eukaryotes True nucleus holds DNA Many cell parts with
special functions One cell or
multicellular organisms Plants! Animals! Fungi!
Single-cell organisms!
Eukaryotic cells have organelles that perform special functions:
Manufacture cell products
Breakdown & maintenance
Convert energy Movement,
support Communication
Think as you study cell parts: What does it look like? What is its function? What other organelles does it work
with? How does the structure of this
organelle allow it to do its job? Is it in Animals? Plants? Other?
2 forms of ER:Rough ER Ribosomes
attached to ER give it a rough appearance
Helps synthesize proteins
Transports proteins within cell
Smooth ER Transports Stores calcium Involved in making
lipids
Mitochondria: Powerhouse of the cell
Extract energy from glucose to provide energy for cell functions
Plants have specialized organelles not found in animal cells:
Rigid cell wall: supportChloroplasts: capture energy
from sunLarge vacuole: storage (water,
sugars)
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