BIO 275 - MICROBIOLOGY LAB - UNIT 4
DIMPLE QUESTIONS AND ANSWERS
WITH VERIFIED SOLUTIONS 100%
CORRECT (GRADED A+) NEWLY
UPDTATED 2025
What is a naturally derived substance that kills or stops the growth of
microorganisms?
✔✔ Antibiotic
What is a chemically created compound that inhibits or destroys
microorganisms?
✔✔ Synthetic drug
What term describes bacteria that are unable to grow in the presence of a
drug?
✔✔ Sensitive
What term describes bacteria that can continue growing despite the presence
of a drug?
✔✔ Resistant
What kind of bacteria prefer cooler temperatures, around 25°C?
✔✔ Psychrophiles
What kind of bacteria thrive at human body temperature, around 37°C?
✔✔ Mesophiles
What kind of bacteria grow best at higher temperatures, around 55°C?
✔✔ Thermophiles
What term describes a uniform layer of bacterial growth across an agar
plate?
✔✔ Lawn of bacterial growth
, What is the name for the clear area around an antimicrobial disk on an agar
plate?
✔✔ Zone of inhibition
What does "selection" refer to in microbiology?
✔✔ Determining whether a microorganism can grow on a specific type of medium
What does "differentiation" refer to in microbiology?
✔✔ Determining if a microorganism or medium undergoes a color change on a
specific type of agar
Which type of bacteria are inhibited by Eosin Methylene Blue (EMB) agar?
✔✔ Gram-positive bacteria
Which type of bacteria does EMB agar allow to grow?
✔✔ Gram-negative bacteria
What does EMB agar test for?
✔✔ The ability of bacteria to ferment lactose
What indicates a positive lactose fermentation result on an EMB plate?
✔✔ Colonies that appear dark or have black centers
Which bacteria produce a metallic green sheen on EMB plates?
✔✔ Escherichia coli (E. coli)
Let me know if you'd like this turned into flashcards, a quiz format, or printable
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You said:
A natural agent that either kills or inhibits the growth of a microorganism -
ANSWER✔✔Antibiotic A man-made agent that either kills or inhibits the growth
of a microorganism - ANSWER✔✔Synthetic drug Term that describes when
bacteria cannot grow in presence of drug - ANSWER✔✔Sensitive Term that
describes when bacteria can grow in presence of drug - ANSWER✔✔Resistant
Type of bacteria that grow at 25 degrees Celsius - ANSWER✔✔Psychrophiles
Type of bacteria that grow at 37 degrees Celsius - ANSWER✔✔Mesophiles Type
of bacteria that grow at 55 degrees Celsius - ANSWER✔✔Thermophiles Term that
DIMPLE QUESTIONS AND ANSWERS
WITH VERIFIED SOLUTIONS 100%
CORRECT (GRADED A+) NEWLY
UPDTATED 2025
What is a naturally derived substance that kills or stops the growth of
microorganisms?
✔✔ Antibiotic
What is a chemically created compound that inhibits or destroys
microorganisms?
✔✔ Synthetic drug
What term describes bacteria that are unable to grow in the presence of a
drug?
✔✔ Sensitive
What term describes bacteria that can continue growing despite the presence
of a drug?
✔✔ Resistant
What kind of bacteria prefer cooler temperatures, around 25°C?
✔✔ Psychrophiles
What kind of bacteria thrive at human body temperature, around 37°C?
✔✔ Mesophiles
What kind of bacteria grow best at higher temperatures, around 55°C?
✔✔ Thermophiles
What term describes a uniform layer of bacterial growth across an agar
plate?
✔✔ Lawn of bacterial growth
, What is the name for the clear area around an antimicrobial disk on an agar
plate?
✔✔ Zone of inhibition
What does "selection" refer to in microbiology?
✔✔ Determining whether a microorganism can grow on a specific type of medium
What does "differentiation" refer to in microbiology?
✔✔ Determining if a microorganism or medium undergoes a color change on a
specific type of agar
Which type of bacteria are inhibited by Eosin Methylene Blue (EMB) agar?
✔✔ Gram-positive bacteria
Which type of bacteria does EMB agar allow to grow?
✔✔ Gram-negative bacteria
What does EMB agar test for?
✔✔ The ability of bacteria to ferment lactose
What indicates a positive lactose fermentation result on an EMB plate?
✔✔ Colonies that appear dark or have black centers
Which bacteria produce a metallic green sheen on EMB plates?
✔✔ Escherichia coli (E. coli)
Let me know if you'd like this turned into flashcards, a quiz format, or printable
sheet!
You said:
A natural agent that either kills or inhibits the growth of a microorganism -
ANSWER✔✔Antibiotic A man-made agent that either kills or inhibits the growth
of a microorganism - ANSWER✔✔Synthetic drug Term that describes when
bacteria cannot grow in presence of drug - ANSWER✔✔Sensitive Term that
describes when bacteria can grow in presence of drug - ANSWER✔✔Resistant
Type of bacteria that grow at 25 degrees Celsius - ANSWER✔✔Psychrophiles
Type of bacteria that grow at 37 degrees Celsius - ANSWER✔✔Mesophiles Type
of bacteria that grow at 55 degrees Celsius - ANSWER✔✔Thermophiles Term that
