Microbiology Lab Quest

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Microbio lab challenge

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Ashley Mari

United States

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Microbiology Lab Quest


Froggy Jumps Microbiology Lab QuestOnline version Microbio lab challenge by Ashley Mari 1 What is the primary purpose of aseptic technique in microbiology? a Improve growth rate b Sterilize the room c Prevent contamination of cultures 2 Which tool is used for streak plating to isolate colonies? a Inoculating loop b Scalpel c Pipette tip 3 Which staining technique differentiates bacteria by cell wall properties? a Endospore staining b Acid-fast staining c Gram staining 4 What does a selective medium do? a Indicate pH only b Kill all microbes c Favor growth of certain organisms 5 Which term describes growth at a specific temperature range? a Cryotolerance b Thermal death point c Optimal temperature 6 Which hazard level requires BSL-2 containment? a BSL-1 b BSL-2 c BSL-4 7 What is a colony morphology clue? a Shape and edge of a colony b Humidity level c Color only 8 Which incubator condition is typical for many human pathogens? a 37°C b 4°C c 60°C 9 What is the purpose of a sterile workbench (biosafety cabinet)? a Store equipment b Measure pH c Provide sterile airflow and protection 10 Which broth is used to keep microbes in suspension? a Starch agar b Nutrient broth c Agar plate 11 What does sterilization aim to achieve? a Destroy all viable microorganisms b Promote growth c Alter texture 12 Which reagent is used in Gram staining? a Safranin b Methylene blue c Crystal violet 13 What does a Gram-positive cell wall feature? a Thick peptidoglycan layer b Lipid capsule c Outer membrane 14 What does a Gram-negative cell wall feature? a Thin peptidoglycan and outer membrane b Thick peptidoglycan only c No cell wall 15 Which medium is differential for lactose fermentation? a MacConkey agar b Blood agar c Nutrient agar 16 What does aseptic technique primarily prevent? a Temperature changes b Contamination of samples c Bacterial growth 17 Which tool is used to transfer small volumes precisely? a Scalpel b Inoculating loop c Micropipette 18 Which tool is used to transfer small volumes precisely? a Scalpel b Inoculating loop c Micropipette 19 Which colony feature helps identify rough vs smooth? a Color only b Texture c Growth rate only 20 What is the purpose of a control in experiments? a Accelerate growth b Kill contaminants c Provide a baseline for comparison 21 Which term describes growth without oxygen? a Anaerobic b Facultative c Aerobic 22 Which sugar indicator changes color in fermentation tests? a Methylene blue b Phenol red c Crystal violet 23 What is a colony-forming unit (CFU)? a A single colony b A unit representing viable cells c A DNA fragment 24 Which technique prevents aerosol formation during transfer? a Cooling tips b Lid removal c Flaming neck of tubes 25 Which culture method favors fast-growing bacteria? a Aseptic culture b Pure culture c Enrichment culture 26 What is the purpose of a control plate? a Grow all microbes b Detect contamination c Measure pH 27 Which instrument is used to measure colony diameter? a Ruler or caliper b Pipette c Thermometer 28 What indicates a pure culture visually? a Multiple colors b Single colony type across plate c No growth 29 Which test differentiates bacteria by sugar fermentation products? a Catalase test b Gram stain c Fermentation test 30 Which enzyme breaks hydrogen peroxide in cells? a Oxidase b Lyase c Catalase 31 What does a streak plate achieve? a Mix cultures b Isolate colonies c Detect pH 32 Which agar shows hemolysis around colonies? a Sabouraud agar b Blood agar c MacConkey agar 33 Which lab practice reduces surface contamination? a Shake plates b Increase exposure c Disinfect work area 34 What is the purpose of an incubator? a Cool samples b Provide controlled growth environment c Shred cultures 35 Which color indicates lactose fermentation on MacConkey? a Blue colonies b Pink colonies c Colorless 36 What does a pure culture prove about a sample? a Is non-viable b Contains multiple species c Contains only one organism species 37 Which test uses hydrogen peroxide to detect catalase? a Catalase test b Oxidase test c Coagulase test 38 Which practice reduces aerosol creation? a Shake tubes b Keep cultures capped when not in use c Open tubes widely 39 What is the first step in Gram staining workflow? a Mordant application b Crystal violet staining c Decolorization 40 Which equipment is critical for accurate inoculation? a Pipette tip b Sterile loop c Beaker 41 What does aseptic transfer avoid? a Cooling samples b Contaminating sterile materials c Warming hands 42 Which color change indicates Gram-negative after Safranin? a No color b Purple c Pink/red 43 Which test detects enzyme presence converting hydrogen peroxide? a Catalase test b Indole test c Coagulase test 44 Which plate type is best for observing hemolysis? a MacConkey agar b Blood agar c Nutrient agar 45 Which condition is ideal for mold growth? a Dry, hot b Moisture and moderate temp c Cold, dry 46 What is the primary goal of streak isolation? a Grow mixed colonies b Isolate single colonies c Disinfect plate 47 Which technique prevents cross-contamination? a Open lids wide b Use sterile tools per sample c Reuse same tools 48 What indicates a successful Gram stain result? a Colorless cells b Differentiation of Gram-positive and Gram-negative c Only purple color 49 Which statement about plate labeling is true? a No label needed b Label with sample ID, date, initials c Label after incubation 50 Which is NOT a colony morphology feature? a Edge b Color c Genetic sequence

Microbiology Lab Quest

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Microbiology Lab QuestOnline version

by Ashley Mari

What is the primary purpose of aseptic technique in microbiology?

Which tool is used for streak plating to isolate colonies?

Which staining technique differentiates bacteria by cell wall properties?

What does a selective medium do?

Which term describes growth at a specific temperature range?

Which hazard level requires BSL-2 containment?

What is a colony morphology clue?

Which incubator condition is typical for many human pathogens?

What is the purpose of a sterile workbench (biosafety cabinet)?

Which broth is used to keep microbes in suspension?

What does sterilization aim to achieve?

Which reagent is used in Gram staining?

What does a Gram-positive cell wall feature?

What does a Gram-negative cell wall feature?

Which medium is differential for lactose fermentation?

What does aseptic technique primarily prevent?

Which tool is used to transfer small volumes precisely?

Which tool is used to transfer small volumes precisely?

Which colony feature helps identify rough vs smooth?

What is the purpose of a control in experiments?

Which term describes growth without oxygen?

Which sugar indicator changes color in fermentation tests?

What is a colony-forming unit (CFU)?

Which technique prevents aerosol formation during transfer?

Which culture method favors fast-growing bacteria?

What is the purpose of a control plate?

Which instrument is used to measure colony diameter?

What indicates a pure culture visually?

Which test differentiates bacteria by sugar fermentation products?

Which enzyme breaks hydrogen peroxide in cells?

What does a streak plate achieve?

Which agar shows hemolysis around colonies?

Which lab practice reduces surface contamination?

What is the purpose of an incubator?

Which color indicates lactose fermentation on MacConkey?

What does a pure culture prove about a sample?

Which test uses hydrogen peroxide to detect catalase?

Which practice reduces aerosol creation?

What is the first step in Gram staining workflow?

Which equipment is critical for accurate inoculation?

What does aseptic transfer avoid?

Which color change indicates Gram-negative after Safranin?

Which test detects enzyme presence converting hydrogen peroxide?

Which plate type is best for observing hemolysis?

Which condition is ideal for mold growth?

What is the primary goal of streak isolation?

Which technique prevents cross-contamination?

What indicates a successful Gram stain result?

Which statement about plate labeling is true?

Which is NOT a colony morphology feature?