Biology Practical Review (Bacteria and Protists)

8 Pages
Unlock Document

Northeastern University
BIOL 1114
Mary- Susan Potts- Santone

Domain Bacteria - cell wall made of peptidoglycan: composed of sugars, carbs, and amino acids purpose of peptidoglycan is in the cell wall as reinforcement, which protects it from the environment and osmotic pressure changes -classified through gram positive and gram negative 1. gram positive - thick peptidoglycan (purple): retains stain 2. gram negative - thin peptidoglycan (pink) -3 shapes bacteria can have 1.cocci 2.bacilli 3.spirilli -reproduce asexually: binary fission (identical to parent) - disease causing=disease causing -Autotrophs: produce own food ex.) plants -Heterotrophs: need an outside food source for energy ex.) humans -symbiotic relationship - is an interaction between 2 or more organisms that may or may not benefit each other. -E.coli is found in the intestines of humans and other animals 1. gram negative light pink color (tint) small dots (rod-shaped) -Staphylococcus is a bacteria found on the skin 1. gram positive purple color grouped together in chains cocci shaped ORDER OF GRAM STAINING TECHNIQUE 1. crystal violet 2. gram iodide 3. decolorizer 4. safranin -importance of gram staining differentiating between bacterial species which antibiotic to use if pathogenic -T. pallidum (Treponema) brown color spirilli - Cyanobacteria (anabaena) cocci in long chains blue color photosynthetic -Rhizobium pink color bacilli gram negative clustered -Rhizobium is a bacteria that lives on the legumes of plants which are located at the roots. It is a nitrogen fixing bacteria, which converts nitrogen into nitrates that the plant can use. They develop into lumps in the roots of the plants - Lichens: symbiotic relationship between cyanobacteria and fungi LAB #2: DOMAIN EUKARYAKINGDOM PROTISTA -Volvox phylum: chlorophyta flagella single celled autotroph asexual - Euglena phylum:Euglenophyta autotroph and heterotroph asexual flagella -Trypanosoma phylum: euglenophyta single celled heterotrophic asexual flagella -Amoeba phylum: rhizopoda s
More Less

Related notes for BIOL 1114

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.