What’s on the Enzymes poster
A definition and 5 facts worth remembering.
Enzymes are proteins that speed up reactions without being used up. Each one has a specific shape that fits only its own substrate.
- The active site fits one substrate — the lock and key model.
- Enzymes are not consumed; one molecule works repeatedly.
- Each has an optimum temperature and pH.
- Too hot or the wrong pH and the shape changes permanently.
- A denatured enzyme cannot recover — the change is irreversible.
- Amylase in saliva breaks starch into sugar. It stops working in the stomach's acid.
Denatured is not the same as 'killed'. Enzymes were never alive; their shape simply changed.
Questions about the Enzymes poster
- What’s on the Enzymes (9th Grade) poster?
- A definition and 5 facts worth remembering. Enzymes are proteins that speed up reactions without being used up. Each one has a specific shape that fits only its own substrate. The active site fits one substrate — the lock and key model.; Enzymes are not consumed; one molecule works repeatedly.; Each has an optimum temperature and pH.; Too hot or the wrong pH and the shape changes permanently.; A denatured enzyme cannot recover — the change is irreversible.; Amylase in saliva breaks starch into sugar. It stops working in the stomach's acid.. Denatured is not the same as 'killed'. Enzymes were never alive; their shape simply changed.
- Who is the Enzymes (9th Grade) poster for?
- Enzymes (9th Grade) is filed under 9th Grade (ages 14–15), so it matches what that year asks a child to remember. It is equally useful to an older student revisiting science, and to the parent or teacher answering the question at the kitchen table.
- When should you use the Enzymes (9th Grade) poster?
- Draw the lock and key. It explains specificity and denaturing in one picture. A wall chart earns its place by being glanceable from where the work is happening, so Enzymes (9th Grade) belongs on the wall where that science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Enzymes (9th Grade)?
- Cell Theory, DNA Structure and Evidence for Evolution sit alongside Enzymes (9th Grade) in the 9th Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Cell TheoryDNA StructureEvidence for Evolution
- Is the Enzymes (9th Grade) poster free to download and print?
- Yes. Enzymes (9th Grade) downloads as a free PDF with no account, no email and no watermark, like everything else in the 9th Grade set. 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 Enzymes (9th Grade) poster print at?
- Enzymes (9th Grade) 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 Enzymes (9th Grade) loses nothing.Printing guide
Related posters
Charts that sit alongside Enzymes on the same wall.
Browse every 9th Grade poster, or start from the full catalogue.