Classifying Bacteria: 6 Key Methods

cell shape, size, colony shape size and colour, smell, arrangement, and growth requirements

1. coccus - round
2. coccobaccilus - in between round and rod shaped
3. vibrio - comma shaped
4. helical- helix
5. filamentous - long rope shape
6. baccilus - rod shaped

1. diplo - two cells together
2. straphylo - cluster, grape arrangement
3. strepto - linear

<p>energy source, oxygen requirements, temparature and pH</p> Signup and view all the answers

<p>1.conjugation - DNA is transfered through the conjugation pilus, one strand of the plasmid is transferred then a copy is made. 2.transformation: small pieces of free DNA in the environment (usually from lysed bacterial cells) are taken up by bacteria and incorporated into the chromosome 3.transduction: genes transferred through bacteriophages 4.transposition: transposase enzymes excise DNA from one location in the DNA to another</p> Signup and view all the answers

<p>lag phase - no increase in living bacteria log phase - exponential growth of bacteria stationary phase - plateau in division, same death rate as growth rate decline phase - exponential decrease in bacteria</p> Signup and view all the answers

<p>structures made to protect the bacterial genome in a dormant state when environmental conditions are unfavourable. they can survive with no nutrient source or water making them hard to kill</p> Signup and view all the answers

<p>purple after gram staining, thick peptidoglycan layer but no outer lipid membrane. no O-specific side chains present but teichoic and lipoteichoic acids are present. includes all staphylococcus and streptococci and some listera species</p> Signup and view all the answers

<p>red colour after staining, thin peptidoglycan layer, outer lipid membrane side-O chains present but techoic and lipotechoic acids arent present. include salmonella, psuedomonas and enterococci species.</p> Signup and view all the answers