Bio Flashcards
Differences between prokaryotes and eukaryotes
Eukaryotic cells contain membrane-bound organelles (such as the nucleus and mitochondria), while prokaryotic cells do not
Viral pathogens
Unique-lack ribosomes
G protein coupled receptors
- Adenylyl cyclase-enzyme that synthesizes cAMP
- receive signals from the environment, such as light, nutrients, and other cells, and translate them into actions within the cell.
Conjugation
Transfer in between bacteria
via pinus
m RNA levels of genes in an operon
Transcription factors:
-binds to promoter
-control when and how genes are turned on or off
Operon
3 main parts: promoter, operator, and genes controlled by operon
Operator
Repressors bind to operators
Transformation in bacteria
Direct uptake of DNA across the membrane
Transduction in bacteria
Bacteria phage-like transferring through a duct
SNOW DROP
transpons
Single strand in bacteria phage
Use RNA as genetic material
Commensalism
a relationship that’s beneficial to one but doesn’t affect another
Prokaryotes and eukaryotes chromosomes
Eukaryotes have telomers and histones
Telomeres: protect and reserve DNA from degradation
Histones: bind to DNA, help give chromosomes their shape, and help control the activity of genes (restricted to archaean cells and eukaryotic cells)
archaea vs bacteria
-both are single celled prokaryotes
-archaea lack peptidoglycan found in most bacteria; often found in extreme environments