chapter 2 Flashcards
(15 cards)
unicellular organism with relatively simple cell structure.
prokaryote
compartmentalized cell structure with components bounded by intracellular membranes
eukaryote
in 2 major groups and may be unicellular or multicellular
eukaryotes
2 distinct types of prokaryotes
bacteria
archaea
3 major groups-of of organisms from evolutionary perspective
bacteria
archaea
eukaryotes
major difference between prokaryotic and eukaryotic cells
eukaryotic cell has a nuclear envelope
which cell has a nuclear envelope
eukaryotic
what class of proteins do eukaryotes use to pack their DNA
histones and chromatin
protein found in eukaryotes that complexes with DNA to form chromosomes
Histones
consists of DNA and proteins found in the eukaryotic nucleus
chromatin
what do histones do
- regulate accessibility of DNA to enzymes that copy and read the DNA
- Enable DNA to fit into nucleus
do not possess histones, dna doesn’t exist in ordered tightly packed arrangement found in eukaryotic cells
bacteria
why are viruses neither prokaryotic or eukaryotic
don’t possess structure of a cell
3 fundamental events for a cell to reproduce
- gene info must be copied
- copies must be separated
- cell must divide
how do prokaryotes reproduce
binary fission
