Unit 4 - Cell Structure Flashcards
What did Hooke discover?
Cells
Looked at cork
What did Leeuwenhoek discover?
Living cells
Protists & bacteria
What did Schleider discover
All plants are made of cells
What did Schwann discover
All animals are made of cells
What did Virchow discover?
All cells come from preexisting cells
What technology allowed for cells to be discovered?
Microscopes
What are the 3 parts of Cell Theory?
- All living things are made of cells.
- The cell is the basic unit of life.
- All cells come from preexisting cells.
Nucleus
Holds DNA
Control center of the cell
Cytoplasm
Fluid that fills the cell
Place where chemical reactions occur
Ribosomes
Make proteins
Mitochondria
Converts glucose into ATP for energy
Carry out cellular respiration
Powerhouse of the cell
Chloroplast
Harvests solar energy and converts into chemical energy
Creates glucose
Carry out photosynthesis
Lysosome
Digest food
Acidic and full of enzymes
“lys” = “break”
Vacuole
Stores water, salts, proteins, and carbohydrates
Cell membrane
Barrier between cell and outside world
Cell wall
Holds cell together
Rigid structure
Golgi body
Receives vesicles and proteins from ER
Modifies and packages proteins
Smooth Endoplasmic Reticulum (SER)
Creates lipids, membranes, and vesicles
Rough Endoplasmic Reticulum (RER)
Creates proteins for export
Coated in ribosomes
Vesicles
Transport things throughout the cell
Cytoskeleton
Gives structure to the cell
Made of microtubules, intermediate filaments, and microfilaments
Centrioles
Help cell divide
Cilia
Hair-like coating that help cells move
Flagella
Whip-like tail used for movement
Nucleolus
Where ribosomes are made
Inside nucleus
What cell parts are unique to animal cells?
Centriole
What cell parts are unique to plant cells?
Cell wall
Large central vacuole
Chloroplast
Prokaryote examples
Bacteria
(Eubacteria & Archaea)
Eukaryote examples
Protists, Plants, Fungi, Animals
What cell structures do prokaryotes have?
Cell wall, ribosomes, nucleoid, circular DNA, cilia & flagella
What cell structures do eukaryotes have?
All of them, nucleus, linear DNA
What is endosymbiosis?
Mitochondria and chloroplast were once free-living prokaryotes that now live in eukaryotic cells.
“living inside”
Evidence for endosymbiosis
Mitochondria and chloroplasts have circular DNA like prokaryotes.
Mitochondria and chloroplasts have double membranes.
Mitochondria and chloroplasts divide like prokaryotes.