Ch,6: Cells Flashcards
Basic features of all cells
plasma membrane
ribosomes
cytoplasm
DNA
two types of cells exist
eukaryotic and prokaryotic
Only organisms of the domains Bacteria and Archaea consist of prokaryotic cells
3 billion years
Eukaryotic cells include
protist, helminths, fungi, algae
Characteristics of Prokaryotic cells
No nucleus DNA is found in a region, the nucleoid No membrane-bound organelles Cytoplasm bound by the plasma membrane Cytoplasm consists of cytosol and all the organelles
Characteristics of eukaryotic cells
DNA in a nucleus defined by a nuclear envelope
Membrane-bound organelles
Cytoplasm is the region between the plasma membrane and nucleus
Difference between animal cells and plants cells
animal cell has lysosomes, centrioles, no cell wall
Plants cell wall has cellulose, chloroplast, central vacuole
a selective barrier that allows sufficient passage of oxygen, nutrients, and waste to service the volume of every cell
plasma membrane
Makes up more than half of the total membrane in eukaryotic cells
Membranous structure, made up of membranes
Reticulating goes back and forth.Makes up half of the total membrane in Eukaryotic cells. ALWAYS CONNECTED TO THE NUCLEUS.
The XXXX is continuous with the nuclear envelope
Endoplasmic reticulum
Two types of ER
rough and smooth
Functions of Smooth ER
Synthesizes lipids
Metabolizes carbohydrates
Detoxifies poison
Stores calcium
Function of Rough ER
Has bound ribosomes, which secrete glycoproteins (proteins covalently bonded to carbohydrates)
Distributes transport vesicles
Produces membranes
contains most of the cell’s DNA and is usually the most conspicuous organelle
nucleus
encloses the nucleus, separating it from the cytoplasm
Formed by the Endoplasmic Reticulum
nuclear envelope
In the nucleus, DNA and proteins form genetic material called XXXX
XXXXXX condenses during cell division to form discrete chromosomes
chromatin