MID SEM CONTENT REVIEW 2023 MEDI1000

What are the nomenclature rules for naming organisms?

• both components are either italicised or underlined

• The first letter of the genus is always capitalised and the first letter of species is always lower case

• we dont have to name them bcos they already have names duh

• both the genus and species are capitalised and the components are underlined

The contributions of robert hooke and lewis Pasteur are different because...

• Hooke was the first person to describe the cell, Pasteur discovered pasteurisation

• Hooke discovered the use of hand washing to prevent disease spread and Pasteur developed antisepsis

• Both of these individuals were the first to discover tuberculosis

some characteristics of important eukaryotes include

• fungi- have a cell wall

  algae- can be unicellular or multicellular

• protozoa-single celled eukaryotes

• bacteria- can be classified as gram positive or gram negative

• viruses - are obligate extracellular microbes

Which is true about the differences in the cell wall of gram positive and gram negative bacteria?

• gram-positive bacteria have Lipopolysaccharide

• Gram negative bacteria have thin peptidoglycan and an outer membrane

• gram negative bacteria have thick peptidoglycan and no outer membrane

• both gram negative and gram positive bacteria have lipopolysaccharide and peptidogycan

What is the function of the glycocalyx on bacteria?

• contributes to the peptidoglycan layer in gram positive bacteria

• aids in DNA transfer between bacteria

• it is bristle-like and present in multiple numbers

• offers adherence, protection from phagocytosis and sometimes protection from antibiotics

endospores...

• are resistant to heat/disinfectants and can survive for years in soil +dust

• are for survival

• are present only in viruses

• are not a bad thing for us

Bacteria divide by a process of...

• mitosis

• binary fission

• binosis

• yourtoesis

The difference between disinfection and sterilisation is that...

• disinfection is the removal of pathogens only but sterilisation is the removal of all microbes including bacterial spores

• disinfection is the removal of visible soils like food residues and sterilisation is the removal of all pathogens

• they are the same thing

• They both destroy various organisms reducing viable numbers

methods of disinfection include

• pasteurisation, radiation, boiling and chemical methods

• moist heat

• dry heat

• using formaldehyde

what are prions?

• They are proteinaceous infectious particles that cause mad cow disease

• endospores

• chemical used to disinfect with

• a type of microbe🦠