Quiz 2 Flashcards
Imagine you are viewing bacteria with a microscope, and cells are sphere-shaped and arranged into irregular clusters. How could you describe them?
Straphylococci
Peptidoglycan belongs to this category of biological molecules
Carbohydrates
Which of the following is NEVER found in gram negative bacteria
A. peptidoglycan
B. Teichonic acids
C. Plasma membrane
D. Lipopolysaccharide
E. Glycocalyx
Teichonic Acid
Which of the following is NEVER found in gram positive bacteria?
A. Peptidoglycan
B. Techonic acids
C. Plasma membrane
D. Lipopolysacchraide
E. Glycocalyx
Lipopolysaccharide
A gram stain is considered a ________ staining process.
Differential
In a gram stained bacterium that is Gram negative, where would the crystal violet-iodine complex be located?
None of the above
When this molecule breaks down, one of the products is endotoxin.
Lipopolysaccharide
In a gram stained bacterium that is gram negative, where would the safarnin be located?
Cytoplasm
In a gram stained bacterium that is gram positive where would the crystal violet-iodine complex be located?
Cell wall
In a gram stained bacterium that is gram positive where would saffrainin be located?
Cytoplasm
Gram negative bacteria have a thick layer of Peptidoglycan in their cell walls
False
Which of these structures is found outside the cell wall and can be broken down and used as an energy source when resources are scarce?
Glycocalyx
Which of the following bacterial structures are NOT used for locomotion in bacteria?
Fimbraie
Which of the following is used to transfer a plasmid from one bacterial cell to another?
Pili
The phospholipids in a plasma membrane are covalently bound to each other in order to provide strength and rigidity and prevent the cell from undergoing osmotic lysis.
False
Movement of a solute down it’s concentration gradient through a membrane-bound transport protein
Facilitated diffusion
This process only occurs in bacteria
Group translocation
Movement of a solute down its concentration gradient directly through the phospholipid bilayer
Simple diffusion
Consumes ATP to move a solute against its concentration gradient through a specific membrane- bound transport protein
Active transport
Water moving across a selectively permeable membrane down its concentration gradient
Osmosis
Supposes a bacterium that has lost its cell wall is placed in pure distilled water. What effect will this have on the cell?
There will be a net movement of water into the cell.
The cell will undergo osmotic lysis
Suppose a typical bacterium is placed in a saturated salt solution. What effect will this have on the cell?
There will be a net movement of water out of the cell
Suppose a typical bacterium is placed in a saturated salt solution. How would you describe that solution, relative to the cytoplasm of the bacterium?
Hypertonic
