Lecture 1,2,3 Day 1 Flashcards
3 structural parts of bacteria
Cytoplasmic matrix
Bacterial cell envelope
Bacterial cell appendages
What are the non membrane bound organelles found in bacterial cell
Depot substances
Metaphosphate granules(volutin) Glycogen granules(site of energy storage)
Outer membrane found in which type of bacteria according to gram stain
Gram negative
Plasma membrane of bacteria made up of
Phospholipids
Proteins
Lipoproteins
Plasma membrane stabilized by
Hydrogen bonds, calcium and magnesium ions
Types of mesosomes
Lateral - sites for dna attachment
Septal - responsible for cell division
Bacteria are classified into … based on thickness of peptidoglycan
Gram positive and gram negative
Which 2 stains are used in gram test
Crystal violet and saphronin
Function of grams iodine in test
Helps stain get entrapped in peptidoglycan mesh
2 main components of the gram negative cell wall
Outer membrane
Periplasm(consisting of protein and peptidoglycans)
The outer membrane is largely made up of the lipopolysacharide layer. This layer is made up of 3 parts. These are
Lipid A
Outer and inner core
O-antigen repeat
Techoic acids are found in which classification of bacteria. Function?
Gram positive
Responsible for cell enlargement
Types of pili
Ordinary pili-adherence to surfaces ie receptors on host cell
Sex pili-transfer of genetic material from one species to another
What are the types of flagella arrangement
Polar/monotrichous Lophotrichous Amphitrichous Peritrichous Amphilophotrichous
Examples of bacteria with endospores are
Bacillus
Clostridium
