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State one part of the cell theory.
How do viruses reproduce? What structure is common to all living things? Hint – think about ? #1 Name one structure that is common to prokaryotic and eukaryotic cells. Where is DNA located in a prokaryotic cell? Where is DNA located in a eukaryotic cell?
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Prokaryote cells are smaller and simpler
Commonly known as bacteria microns in size Single-celled(unicellular) or Filamentous (strings of single cells)
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Prokaryote cells are simply built (example: E. coli)
capsule: slimy outer coating cell wall: tougher middle layer cell membrane: delicate inner skin
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Prokaryote cells are simply built (example: E. coli)
cytoplasm: inner liquid filling DNA in one big loop pilli: for sticking to things flagella: for swimming ribosomes: for building proteins
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Prokaryote lifestyle unicellular: all alone colony: forms a film
filamentous: forms a chain of cells
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Prokaryote Feeding Photosynthetic: energy from sunlight
Disease-causing: feed on living things Decomposers: feed on dead things
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Eukaryotes are bigger and more complicated
Have organelles Have chromosomes can be multicellular include animal and plant cells
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Organelles are membrane-bound cell parts
Mini “organs” that have unique structures and functions Located in cytoplasm
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Cell Structures Cell membrane
delicate lipid and protein skin around cytoplasm found in all cells
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Nucleus a membrane-bound sac evolved to store the cell’s chromosomes(DNA ) has pores: holes
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Nucleolus inside nucleus location of ribosome factory
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mitochondrion makes the cell’s energy the more energy the cell needs, the more mitochondria it has
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Ribosomes build proteins from amino acids in cytoplasm may be free- floating, or may be attached to ER made of RNA
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Endoplasmic reticulum
may be smooth: builds lipids and carbohydrates may be rough: stores proteins made by attached ribosomes
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Golgi Complex takes in sacs of raw material from ER sends out sacs containing finished cell products
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Lysosomes sacs filled with digestive enzymes digest worn out cell parts digest food absorbed by cell
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Centrioles pair of bundled tubes organize cell division
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Cytoskeleton made of microtubules found throughout cytoplasm
gives shape to cell & moves organelles around inside.
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Structures found in plant cells
Cell wall very strong made of cellulose protects cell from rupturing glued to other cells next door
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Vacuole huge water- filled sac keeps cell pressurized stores starch
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Chloroplasts filled with chlorophyll turn solar energy into food energy
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How are plant and animal cells different?
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Structure Animal cells Plant cells cell membrane Yes yes nucleus nucleolus ribosomes ER Golgi centrioles no cell wall mitochondria cholorplasts One big vacuole cytoskeleton
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Eukaryote cells can be multicellular
The whole cell can be specialized for one job cells can work together as tissues Tissues can work together as organs
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Advantages of each kind of cell architecture
Prokaryotes Eukaryotes simple and easy to grow can specialize fast reproduction multicellularity all the same can build large bodies
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Examples of specialized euk. cells
liver cell: specialized to detoxify blood and store glucose as glycogen.
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How do animal cells move?
Some can crawl with pseudopods Some can swim with a flagellum Some can swim very fast with cilia
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Pseudopods means “fake feet” extensions of cell membrane
example: ameoba
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Flagellum/flagella large whiplike tail
pushes or pulls cell through water can be single, or a pair
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Cilia fine, hairlike extensions attached to cell membrane
beat in unison
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