Chapter 4 Questions Flashcards
How would you be able to identify streptococci through a microscope
Spherical shaped bacteria in chains
What is the main feature that distinguishes prokaryotes from eukaryotes
Prokaryotes have no nucleus
Why are bacterial capsules medically important
Gives bacteria protection against the environment and impairs phagocytosis
How do bacteria move
They move by flagella, cilia
Why are drugs that target cell walls useful
Without a cell wall, the bacteria is susceptible to destruction by chemicals
Why are mycoplasmas resistant to antibiotics that interfere with cell wall synthesis
Because they lack a cell wall
How do protoplasts differ from L forms
Protoplasts need penicillin to lose it’s cell wall whereas L form can lose it spontaneously or in response to penicillin.
Which agents can cause injury to the bacterial plasma membrane
Antimicrobial agents and alcohol cause subsequent cell death
How are simple diffusion and facilitated diffusion similar. How are they different
Simple diffusion and facilitated diffusion are similar because they are both methods of diffusion but facilitated diffusion requires a transporting molecule
Where is the DNA located in a prokaryotic cell
In the cytoplasm
What is the general function of inclusions
They are membrane enclosed nutrient storage structures
Under what conditions do endospores form
When there is a lack of nutrients in the cell
What is a nucleoid
Region in the cytoplasm where DNA is localized in prokaryotes
What is a nucleus
Area containing a nuclear membrane where the nucleolus resides.
What is smooth er
Synthesis of lipids/carbs
