prokaryotes Flashcards
an example of prokaryotes
bacteria
what are bacteria
single cell with no membrane bound organelles
what are plasmids
double stranded DNA
contain additional genes that aid the bacterium’s survival such as antibiotic resistance/ toxin producing genes
what do ribosomes do
make protein
in the ribosome what is the size
70S
what does S mean
a measure of size by rate of sedimentation
what does the nucleoid do
the region where single circular length of DNA is folded
DNA carries all essential information
what is the cell wall
its made up of long chained molecule that is made up of a sugar and amino acids called peptidoglycan
what does gram negative bacteria not retain and why is this
they don’t retain the gram stain(crystal violet) this is because the cell wall has an outer layer
gram negative is washed with what that doesn’t retain ti
acetone and absolute alcohol
what does gram positive retain
the gram stain this is because of the thick peptidoglycan wall absorbs the stain
what does gram positive bacteria not have
an outer wall
what are gram negative bacteria more resistant to
antibiotics
why are gram negative more resistant to *
as it has a cell wall with an outer membrane that protects them. from the antibiotic
