20 Questions
Which microorganisms produce antibiotics?
Bacteria
What is the primary function of antibiotics for the microorganism that produces them?
To survive difficult environmental conditions
At which stage of growth are antibiotics produced?
Stationary phase
What is the effect of bactericidal antibiotics on bacteria?
Reduces bacterial load by preventing cell wall formation
At what dose can an antibiotic be bacteriostatic?
Highest dose
What is the primary function of bacteriostatic antibiotics?
Inhibit growth and reproduction of bacteria by preventing the biosynthesis of cell proteins and nucleic acids
What is the difference between broad-spectrum and narrow-spectrum antibiotics?
Broad spectrum kills a wide range of microorganisms, while narrow spectrum kills Gram-positive bacteria only or Gram-negative bacteria not both
How do antibiotics that inhibit synthesis of bacterial cell walls cause bacterial cell death?
By causing a morphological imbalance and weakness in the rigidity of the cell wall, leading to cell explosion
What is the mechanism of antibiotic action for altering cell membrane permeability?
Antibiotic binds to the cell membrane, alters its structure and makes it more permeable, causing leakage of cellular molecules and cell death
Which condition is necessary for the effectiveness of an antibiotic according to the text?
Entry of the antibiotic and finding the target molecule in an active form
What is the primary function of antibiotics for the microorganism that produces them?
To aid in survival during difficult environmental conditions
At which stage of growth are antibiotics produced?
Stationary phase
What is the effect of bactericidal antibiotics on bacteria?
Cause bacterial death
What is the mechanism of antibiotic action for altering cell membrane permeability?
Interference with protein synthesis
What is the difference between broad-spectrum and narrow-spectrum antibiotics?
Broad-spectrum have a wide range of side effects, while narrow-spectrum have minimal side effects
What is the mechanism of action for antibiotics that inhibit synthesis of bacterial cell walls?
They bind enzymes that help form peptidoglycans, leading to weakness in the rigidity of the cell wall and eventually cell death.
What is the primary mechanism of antibiotic resistance related to?
Enzymatic destruction of drug
How does a bacteriostatic antibiotic work?
It inhibits growth and reproduction of bacteria by preventing biosynthesis of cell proteins and nucleic acids.
What does broad spectrum antibiotics do?
They kill a wide range of microorganisms.
What are the conditions necessary for the effectiveness of an antibiotic?
Finding the target molecule and remaining in contact with it in sufficient concentration.
Explore the chemical factors that affect microbial growth, with a focus on antibiotics. Learn about the secondary metabolites produced by certain microorganisms and their role in inhibiting the growth of other microorganisms.
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