Chapter 7 Flashcards
When were cells really understood?
When the microscope was invented.
Where did cells get their name?
Called cells because they look like monk rooms.
Cell
The basic unit of life.
Cell Theory
All living things are composed of cells.
Cells are the basic unit of structure and function.
New cells are produced from existing cells.
What has helped study the cell?
New technologies.
TEM
It can look at cell structures and large proteins.
SEM
It can give 3D images.
Scanning Probe
Scans the surface of a specimen.
Prokaryote
The cell does not contain a nucleus.
Smaller and simple.
Mostly Bacteria.
Eukaryote
Cells that have a nucleus.
Usually larger and more complex.
What is eukaryote like?
A factory.
Organelles
“Little Organisms”
Nucleus
Control Center
Contains DNA.
Nuclear Envelope
Surrounds the nucleus and only lets certain material in.
Chromatin
Lunchroom
Chromosomes
Seating Chart
Nucleolus
A small, dense region full of ribosomes to make proteins.
Ribosomes
“Factory” for making proteins.
ER
Packages lipids, proteins, and other materials.
Rough ER
Contains ribosomes.
Smooth ER
It mostly contains enzymes.
Enzyme
Proteins that speed up a chemical reaction.