Topic C Flashcards
One of the unifying principles of biology that states that all organisms are made of one or more cells, cells are the fundamental unit of life, and all cells come from preexisting cells
Cell Theory
Structures common to ALL cells
Every cell has DNA and RNA, enclosed by a plasma membrane, contains a water-based fluid called cytosol, contains ribosomes, and contains cytoplasm
What is the difference between cytoplasm and cytosol?
The cytoplasm includes all cell contents except the nucleus. The cytosol is the fluid portion of the cytoplasm.
What is the advantage of having cells close to the surface?
Nutrients, water, oxygen, carbon dioxide, and waste products enter or leave a cell through it’s surface
Prokaryotes
Organisms with prokaryotic cells
Description of prokaryotic cells
Lacks nucleus and membrane bound organelles, unicellular, smaller than eukaryotic cells
What domains are prokaryotic cells put in?
Domain archaea and domain bacteria
Share characteristics with bacteria and eukaryotes but have unique structures and chemistry (closer related to eukaryotes)
Domain Archaea
Most abundant and diverse organisms, Earth’s oldest organisms, most have a cell wall that protects the cell and gives it shape, DNA is circular and is located in the nucleoid
Domain Bacteria
Eukaryotes
Organisms with eukaryotic cells
Description of eukaryotic cells
Have a true nucleus, larger than prokaryotic cells, have a cytoskeleton made of protein, and can be unicellular or multicellular
What domain are eukaryotic cells placed in?
Domain eukaryote
What kingdoms are in domain eukaryote?
Category of Protista (includes many kingdoms) and kingdom Animalia, kingdom Fungai, and kingdom Plantae
What are organelles?
Structures inside cells that have specific shapes and functions
True or false: organelles are found in both prokaryotic and eukaryotic cells, but only eukaryotic cells contain membrane-bound organelles
True