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Biology 2.2 Prokaryotic cells - Coggle Diagram
Biology 2.2 Prokaryotic cells
prokaryote structure
smaller than eukaryotes
traits they must have
genetic code
DNA
RNA
single stranded RNA
positive ssRNA
sense strand
negative ssRNA
RNA retrovirus
contains sense strand of RNA, translated into DNA by RNA reverse transcriptase, joins host cell's genome
double stranded RNA
cell wall
contains peptidoglycan
traits they sometimes have
flagellum
slime capsule
classification of prokaryotes
gram testing
gram +
turns blue (absorbs the violet crystal dye due to thick peptidoglycan cell walls)
gram -
turns red (thin peptidoglycan cell walls don't absorb violet crystal dye, gets washed out by alcohol, turns red with red safranin)
testing method
stain with violet crystal dye, dehydrate peptidoglycan cell wall with alcohol, counterstain with red safranin
type of genetic code
shape
bacilli (rod)
cocci (sphere)
spiral