Category Archives: Enzymes

Making ATP: Core content concept maps

In tomorrow’s class we’ll be reviewing our Making ATP unit (enzymes, cell respiration, photosynthesis and the greenhouse effect) with a couple of concept mapping activities. The first, cell respiration core, is made using the really useful free concept mapping tool from IHMC CMap tools. This is a freeware package for most computing platforms – very easy to use and might be a help in your revision!

In the second activity, build your own concept map making as many annotated connections between concepts as you can. Surrounding this, add and annotate the relevant graphs and diagrams.

Enzymes (Core and AHL & C2)

Covering the core and AHL/ SL Option C content, here is a rundown of enzymes, from active sites to end-product inhibition. Again, there are lots of animation resources out there, many of which are used in the presentation – click on the shadowed images to go there.

Check out this article on the potential use of an enzyme in second-generation biofuels.

Enzyme Basics:

What is an enzyme? from Northland (the best one – including inhibitors, pathways and feedback inhibition)

How enzymes work from McGraw Hill

Enzyme basics from

A full collection of savable enzyme animations from Husam Medical

And John Giannini’s Enzyme collection is nice and clear.

Enzyme activity and kinetics

Nice virtual lab from

Enzyme kinetics from Wiley Interscience


Protein denaturation from McGraw Hill


Complete tutorial from Wiley Interscience

What is an enzyme? from Northland

Feedback (end product) inhibition from McGraw Hill

And here’s a quick run down on YouTube:

Protein Synthesis: Transcription and Translation (2009)

This is a re-post for the class of 2009 to revise and the 2010 group to catch on the first time… As always, click on the shadowed images for a link to an animation, or visit the links posted below.


Core (for everyone):

Click4Biology page


Additional Higher Level:

Click4Biology page: TranscriptionTranslation


Further resources:

There are many decent Flash animations and the like on the internet, but the majority cannot be embedded. Below this YouTube video, there are some direct links to resources, some of which can be easily saved.

Learn.Genetics @ Utah

Transcribe and Translate (good, basic, interactive)

How do fireflies glow? (puts it in context)

University of Nebraska:

Protein Synthesis overview (Good enough for SL)

Transcription Details (fits DP Bio HL very well)

Translation Details (fits DP Bio HL very well)

John Kyrk: (visit the parent site at – excellent)

Transcription (fits DP Bio HL very well)

Translation (fits DP Bio HL very well)

St. Olaf College

Transcription (clear and simple)

Translation (clear and simple)

EDIT:  Two more animations (from mrhardy’s wikispace, original source unknown)



WH Freeman

RNA Splicing tutorial (HL only)


Translation with a genetic code dictionary (shows position in the ribosome)

Some more in-depth animations (newly added):

Translation from Wiley Interscience

Translation from LSU Medschool

Translation from The Chinese University in Hong Kong

Protein targeting from Rockefeller University

Digestion (Further Human Physiology) Linklist

Download it here: digestionfhp.ppt

Let’s start with the basics:

Simple Digestion animation by

And don’t forget the excellent review materials at Click4Biology.

Fetal pig digestive system virtual dissection from Whitman College

Control of digestive juice secretion:

Straight to the Point McGraw Hill (their page on types of glands is also very helpful)

Gastric acid production by parietal cells (advanced – look at ‘normal’ only) – John Hopkins

Another Gastric acid animation (over-detailed) PPIKnow Pharmacology website

Digestion of lipids:

Good animation from

Control of bile secretion (advanced) from

I’m still looking for animations for the other subtopics. If you find any, let me know!

Essential Biology 03 – Chemistry of Life uploaded

Part 3 of the revision guide for 2009 session IB Diploma Biology is here:


To the right of this page there are also new updates specifically aimed at IBDP Bio – separate pages for each topic in the syllabus. I’ll try to get these as complete as possible as soon as possible, but things might be a bit quiet round here in the run-up to the exams.

If you dowload the document, let me know how you get on.

Cell Respiration Animation – keeping it simple

Respiration - Heriot Watt StyleClick here for a decent animation of the process of cellular respiration.

I Love Wales

This site has a good few downloadable SMART Board resources and the like. There’s a nice, simple enzymes activity right here. Their KS3 Science area has some Physics and Chemistry resources, too.

Digestion: Quarter Pounder with Cheese to quarter-pounder with wheeze.

Good-quality graphics. Teaching idea: give the video to students and ask them to record or narrate their own descriptions to go along with the images. It’s got to be better than the soundtrack provided here, and should fit the subject guide more closely.

Here is a brilliantly simple animation that shows how Flash should be used:

Digestion Animation –  by

Next up, Robert Winston and a grisly stomach image – missing the lower intestines.

Finally, this one is nicely done: focuses on the enzymes of digestion and absorption through the villi.

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