1. Structure and function Flashcards
What are the three morphologies of bacterial cells and what shape are they?
coccus - spherical
rod/bacillus - cylindrical
spirillum - curved or spiral
What are the four cellular arangements?
single
diplo
Strepto
Staphylo
How do some bacteria get their name?
combining arrangement with morphology
In a bacterial cell, how many chromosomes do they have?
one
What shape is DNA in, in a bacterial cell?
circular
What area of the bacterial cell is the DNA and plasmids in?
nucleoid
What type of ribosome do bacteria have?
70S
What type of mitochondria do archaea have?
70S
What is the function of ribosomes?
organelles used for protein production
What is the structure of inclusion bodies?
thin membrane bound granules in cytoplasm
What is the function of inclusion bodies?
storage to reduce osmotic stress in cell
What is volutin, which is a phosphate storage, an example of?
inclusion bodies
What is the structure of gas vesicles?
conical shaped, gas filled vesicles made of protein
What is the function of gas vesicles?
confer buoyancy in planktonic cells
Are water and solutes able to enter gas vesicles?
no
What is the structure of the cytoplasmic membrane?
double layer of fatty acids
Where is the cytoplasmic membrane located?
Around the cytoplasm
What are the three functions of the cytoplasmic membrane?
- separate it from the environment
- selective permeability
- site of energy production
What is the transport of selective permeable membranes facilitated by?
membrane proteins
Where are transport proteins located?
cytoplasmic membrane
What is the structure of glycocalyx and the different arrangement types?
polysaccharides
thick or thin. rigid or flexible
What are the two types of glycocalyxs?
capsules and slime layers
What is the function of the glycocalyx?
attachment, biofilm formation, and added protection from dehyrdations and attackers
What is the arrangement of the capsule clycocalyx?
tight attachment and matrix