2.1.2: Structure of prokaryotic cells & viruses Flashcards
Compare the DNA in pro and euk cells
pro = free in cytoplasm, circular DNA not associated with proteins
euk = linear strands associated with proteins, bound by nuclear membrane
compare the ribosome size in pro and euk cells
pro = 70S
euk = 80S
are the organelles membrane bound or not in euk and pro cells
pro = none
euk = yes
is there a slime capsule around the cell wall in pro and euk cells
pro = sometimes
euk = no
what is the cell wall made of in pro and euk cells
pro = murein
euk = cellulose/chitin
are there plasmids in pro and euk cells
pro = sometimes
euk = none
where is the site of respiration in pro and euk cells
pro = cytoplasm
euk = mitochondria
what is the size range of pro and euk cell
pro = 0.1-5 micrometers
euk = 10-100 micrometers
describe the structure of a bacterial cell
flagellum, sometimes a slime capsule, cell wall, cell surface membrane, cytoplasm, plasmid, ribosomes, genetic material
what is a plasmid
small circular piece of DNA
describe the structure of a virus
reverse transcriptase, genetic material - RNA, capsid, sometimes a lipid envelope, attachment proteins
what is the size range of a bacterial cell
0.1 - 10 micrometers
what is the size range of a virus
20 - 300 nanometers
how do viruses live?
they are acellular non living particles that can only multiply inside living host cells
what is the role of attachment proteins on viruses
allow the virus to identify and attach to a host cell
