What’s on the Gram Staining poster
Gram-positive against Gram-negative, side by side.
- Gram-positive: Thick peptidoglycan layer
- Gram-positive: Stains purple
- Gram-positive: No outer membrane
- Gram-positive: More susceptible to penicillin
- Gram-positive: Staphylococcus, Streptococcus
- Gram-negative: Thin peptidoglycan
- Gram-negative: Stains pink
- Gram-negative: Outer membrane with LPS
- Gram-negative: More antibiotic resistant
- Gram-negative: E. coli, Salmonella, Pseudomonas
- The outer membrane in Gram-negatives blocks many antibiotics, which is why they are g…
LPS in the outer membrane is an endotoxin: released on cell death, it can trigger septic shock.
Questions about the Gram Staining poster
- What’s on the Gram Staining poster?
- Gram-positive against Gram-negative, side by side. Gram-positive: Thick peptidoglycan layer; Gram-positive: Stains purple; Gram-positive: No outer membrane; Gram-positive: More susceptible to penicillin; Gram-positive: Staphylococcus, Streptococcus; Gram-negative: Thin peptidoglycan; Gram-negative: Stains pink; Gram-negative: Outer membrane with LPS; Gram-negative: More antibiotic resistant; Gram-negative: E. coli, Salmonella, Pseudomonas; The outer membrane in Gram-negatives blocks many antibiotics, which is why they are g…. LPS in the outer membrane is an endotoxin: released on cell death, it can trigger septic shock.
- Who is the Gram Staining poster for?
- Gram Staining belongs to the Biology section rather than to a school year, because life science is not something one grade owns. Anyone learning microbiology can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Gram Staining poster?
- Thick peptidoglycan retains the crystal violet. Thin walls with an outer membrane do not. A wall chart earns its place by being glanceable from where the work is happening, so Gram Staining belongs on the wall where that life science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Gram Staining?
- Bacterial Structure, Antibiotic Resistance and How Antibiotics Work sit alongside Gram Staining in the Biology section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Bacterial StructureAntibiotic ResistanceHow Antibiotics Work
- Is the Gram Staining poster free to download and print?
- Yes. Gram Staining downloads as a free PDF with no account, no email and no watermark, like everything else in the Biology section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Gram Staining poster print at?
- Gram Staining is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Gram Staining loses nothing.Printing guide
Related posters
Charts that sit alongside Gram Staining on the same wall.
Browse every Biology poster, or start from the full catalogue.