BIO 250 MICROBIOLOGY LABS 1 TO 8 2026
PRACTICE LAB QUESTIONS AND SOLUTIONS
GUARANTEED PASS
◉ agent naturally produced by microorganisms. Answer: antibiotic
◉ agent that slows the growth of bacteria. Answer: bacteriostatic
◉ agent artificially synthesized or manipulated from other products.
Answer: antimicrobial
◉ targets DNA gyrase, preventing DNA replication within a cell.
Answer: novobiocin
◉ Disrupts cell wall stability, eventually leading to cell lysis. Answer:
penicillin
◉ binds with bacterial ribosomes to prevent cell growth and cell
division. Answer: gentamicin
◉ the mold that alexander fleming observed preventing bacterial
growth was. Answer: penicillium notatum
,◉ since the discovery and use of antibiotics, we no longer need to
worry about bacterial infections. Answer: false
◉ penicillin works by. Answer: disrupting cell wall stability
◉ novobiocin prevents the function of ______ in a cell. Answer: DNA
gyrase
◉ bacteriostatic antibiotics cause an inhibition of growth rather
than cell lysis and death. Answer: true
◉ gentamicin binds with bacterial _______. Answer: ribosomes
◉ the effective zone of inhibition is the same for all antibiotics.
Answer: false
◉ an antibiotic is a synthetic drug produced in a laboratory. Answer:
false
◉ ______ is a genus that produces antibiotics. Answer: all of the
above: Bacillys, Cephalosporium, and Streptomyces
, ◉ penicillin is produced by a ____. Answer: mold
◉ novobiocin is a bacteriostatic, narrow-spectrum antibiotic.
Answer: true
◉ gentamicin is synthesized by a ___. Answer: gram-positive bacteria
◉ bacteriocidal agents kill bacteria by _____. Answer: cell wall lysis
◉ resistant bacteria will exhibit ____ during a kirby-bauer diffusion
test. Answer: no zone of inhibition
◉ a spreader is used when inoculating a kirby-bauer diffusion plate
to ___. Answer: create a uniform bacterial lawn
◉ zones of inhibition should be measured after they exceed 25 mm.
Answer: false
◉ the diagram below illustrates resistance to drug ___ (nothing
around A, little around B, large around C). Answer: A
◉ ______ are asexually produced spores of the penicillum fungus.
Answer: conidia
PRACTICE LAB QUESTIONS AND SOLUTIONS
GUARANTEED PASS
◉ agent naturally produced by microorganisms. Answer: antibiotic
◉ agent that slows the growth of bacteria. Answer: bacteriostatic
◉ agent artificially synthesized or manipulated from other products.
Answer: antimicrobial
◉ targets DNA gyrase, preventing DNA replication within a cell.
Answer: novobiocin
◉ Disrupts cell wall stability, eventually leading to cell lysis. Answer:
penicillin
◉ binds with bacterial ribosomes to prevent cell growth and cell
division. Answer: gentamicin
◉ the mold that alexander fleming observed preventing bacterial
growth was. Answer: penicillium notatum
,◉ since the discovery and use of antibiotics, we no longer need to
worry about bacterial infections. Answer: false
◉ penicillin works by. Answer: disrupting cell wall stability
◉ novobiocin prevents the function of ______ in a cell. Answer: DNA
gyrase
◉ bacteriostatic antibiotics cause an inhibition of growth rather
than cell lysis and death. Answer: true
◉ gentamicin binds with bacterial _______. Answer: ribosomes
◉ the effective zone of inhibition is the same for all antibiotics.
Answer: false
◉ an antibiotic is a synthetic drug produced in a laboratory. Answer:
false
◉ ______ is a genus that produces antibiotics. Answer: all of the
above: Bacillys, Cephalosporium, and Streptomyces
, ◉ penicillin is produced by a ____. Answer: mold
◉ novobiocin is a bacteriostatic, narrow-spectrum antibiotic.
Answer: true
◉ gentamicin is synthesized by a ___. Answer: gram-positive bacteria
◉ bacteriocidal agents kill bacteria by _____. Answer: cell wall lysis
◉ resistant bacteria will exhibit ____ during a kirby-bauer diffusion
test. Answer: no zone of inhibition
◉ a spreader is used when inoculating a kirby-bauer diffusion plate
to ___. Answer: create a uniform bacterial lawn
◉ zones of inhibition should be measured after they exceed 25 mm.
Answer: false
◉ the diagram below illustrates resistance to drug ___ (nothing
around A, little around B, large around C). Answer: A
◉ ______ are asexually produced spores of the penicillum fungus.
Answer: conidia
