Question

labels
ethanol
heat-fixed bacterial smear
mordant/fixative
primary stain
secondary stain
crystal violet
grams iodine
decolorizer
safranin
distilled water
microscope slides
rinse water
microscope
staining tray
blotting paper

Explanation:

Identify the target items and labels

The laboratory simulation interface shows a Gram staining setup with five unlabeled orange indicator pins pointing to specific items, and five text labels on the left:

• Ethanol
• Heat-fixed bacterial smear
• Mordant/fixative
• Primary stain
• Secondary stain

Match each label to its corresponding item

• Primary stain: Crystal Violet (the first bottle on the left, indicated by the leftmost pin).
• Mordant/fixative: Gram's Iodine (the second bottle, indicated by the second pin).
• Ethanol: Decolorizer (the third bottle, indicated by the third pin).
• Secondary stain: Safranin (the fourth bottle, indicated by the fourth pin).
• Heat-fixed bacterial smear: The slide placed on the rack inside the staining tray (indicated by the bottom-right pin).

Answer:

No.	Label	Matching Item
2	Heat-fixed bacterial smear	Slide in staining tray
3	Mordant/fixative	Gram's Iodine
4	Primary stain	Crystal Violet
5	Secondary stain	Safranin