Chapter 4 - Cell Structure and Function Flashcards
All cells come only from ________ cells
Preexisting
All organisms are composed of
Cells
Cells are the ______ structural and functional unit of organisms.
Smallest
Cells need a large surface area of plasma membrane for ..
for exchanging wastes for nutrients through the plasma membrane
Prokaryotic ____ a membrane-bound nucleus.
Lack
Archaea?
- Live in extreme habitats
- More diverse in shape
Methanogens
Halophiles
Thermoacidophiles
Cell envelope includes …
Plasma membrane
Cell wall
Glycocalyx
Plasma membrane can form internal pouches called ..
Mesosomes
Prokaryotes ____ mitochondria and other eukaryotic organelles
Lack
( long ) - provides motility
Flagella
Small bristle-like fibers that sprout from the cell surface to help attach to other surfaces.
Fimbriae
Rigid, tubular structures used to pass DNA from cell to cell
Conjugation pili
They contain a membrane-bounded nucleus that houses the DNA and contain specialized organelles .
Eukaryotic cells
Known as the traffic cop?
Plasma membrane
Eukaryotic cells contain small structures called _________
Organelles
Two classes of organelles :
Endomembrane System & Energy related organelles .
Command or control center of cell, usually near center. Also separated from cytoplasm by nuclear envelope.
Nucleus .
Produced by the Golgi apparatus?
Lysosomes
Membrane-bounded vesicles that enclose enzymes.
Peroxisomes
________ reactions that produce hydrogen peroxide.
Catalyze
Store materials and support cells ..
Vacuoles
Photosynthesis
Ex: autotrophs make their own food
Chloroplasts
The “powerhouse” of the cell.
Mitochondria
Serves as internal skeleton that maintains cell shape and assists in movement of its parts?
Cytoskeleton.
Intercellular traffic control ..
Actin filaments
Does plant cells have centrioles?
No.
( short ) move in coordinated waves like oars.
Cilia.
( long ) move like a propeller or cork screw
Flagella
