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What is the correct definition of a pathogen
A bacterium, virus, or other microorganism that can cause disease
What technique do scientists use to separate single bacterial cells on agar to grow pure cultures?
Streak plate technique
What type of cell engulfs and digests invading bacteria in tissues?
Macrophage
What fundamental feature distinguishes a prokaryote (such as a bacterium) from a eukaryote?
Prokaryotes lack a nucleus and membrane-bound organelles.
How do normal bacteria in your body help defend against pathogens?
By competing with harmful bacteria for space and nutrients
Why would you be prescribed antibiotics rather than antiviral drugs for a bacterial infection?
Antibiotics target bacteria and do not work on viruses.
Which kingdom do common bacteria belong
Eubacteria
What controls what enters and leaves a bacterial cell
Cell wall
What mechanism allows a population of bacteria to become resistant to antibiotics over time?
Natural selection driven by random mutations
What is the function of a bacterium’s nucleoid
It contains circular DNA without a surrounding membrane
What is the shape of a spirillum bacterium?
Spiral or corkscrew
What condition can develop if a resistant infection like MRSA spreads into the bloodstream?
Sepsis
What structural component allows some bacteria to swim through liquid environments?
Flagellum
How quickly should perishable food be stored after preparation to prevent illness?
Refrigerate promptly
What does MRSA stand for?
Methicillin-Resistant Staphylococcus aureus