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16 Cards in this Set

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TWO BASIC CELL TYPES
(all living cells)
Eukaryotic
(“true nucleus”)
- more complex
Prokaryotic
(“pre-nucleus”)
- simpler, smaller
EUKARYOTIC CELLS
Possess a true “nucleus”
Nuclear material surrounded by a nuclear membrane.
Nuclear material organized into paired chromosomes.
Nuclear membrane (DNA) associated with proteins called histones - form the chromosomes.
Nucleus contains
nucleolus - sites of ribosome synthesis.
EUKARYOTIC CELLS
Internal structure more complex - contains organelles - each have a specific function.
EUKARYOTIC CELLS
Cytoplasmic streaming - continuous movement of the cytoplasm.
EUKARYOTIC CELLS
Cell membranes contain complex lipids - sterols (cholesterol). Cell walls
EUKARYOTIC CELLS
Occur only on plant cells, fungi
Composed of cellulose, chitin.
Division occurs by
mitosis, meiosis.
PROKARYOTIC CELLS
No “true” nucleus - nucleoid.
No nuclear membrane.
No paired chromosomes
No histones.
No nucleolus.
PROKARYOTIC CELLS
No organelles.
No cytoplasmic streaming.
Cell membrane contains no sterols.
PROKARYOTIC CELLS
All typical prokaryotic cells possess cell walls. Composed of peptidoglycan (murein).
Division - binary fission.
Microorganisms of each cell type :Eukaryotic
fungi, protozoa, algae, worms
Microorganisms of each cell type :Prokaryotic
bacteria
Microorganisms of each cell type :Viruses
- neither - acellular
TAXONOMY
study of classification.
Classification
arranging organisms into related groups.