8.1 Cell Respiration

OK, here are some more animations:

Step-through animation – from John Burrell at Patana

Respiration is not breathing! – Tim and Moby (Brainpop)

Good tutorial with questions – University of Wisconsin

Simple overview – Herriot Watt

Flash Overview – UC Davis biosciences

Windows Media overview (very flashy, above HL) – Virtual Cell Animation Collection

Stage-specific animations after the jump (glycolysis, Kreb’s cycle and ETC, oxidative phosphorylation)


Very advanced (but you can isolate the stages of phosphorylation, lysis, oxidation and ATP formation) – from Trinity College Dublin

Another complex one – John Kyrk

Krebs Cycle & ETC:

Basic step-by-step – NSTA Sci Links

Citric Acid Cycle – Essential Biochemistry

Another one from John Kyrk

Oxidative Phosphorylation:

Brilliantly simple ATP synthase animation – St Olaf college

.. and another one – NSTA

3D ATP synthase (right click to save Quicktime .mov) – University of Connecticut

Basic enough – McGraw Hill

Good (jump straight to ‘make ATP’) – University of Connecticut

Step-by-step tutorial – North Harris College

Complete step-by-step – Purdue

And here’s a video of ATP Synthase – the cellular turbine!

Practice Questions:

Metabolism problem set – University of Arizona

Musical Interludes:

Bacteria ate up all the methane from the Deepwater Horizon oil spill” – can you explain the relevance of this story to this topic?

Key terms: oxidation, reduction, electrons, loss, gain, respiration, glycolysis, phosphorylation, lysis, ATP, cytoplasm, hexose, pyruvate, NADH, mitochondrion, matrix, aerobic, anaerobic, Krebs, cycle, electron transport chain, decarboxylated decarboxylation, link reaction, acetyl, coenzyme, CoA, CO2, intermediate, chemiosmosis, cristae, intermembrane space, protons, enzymes.

  1. OIL RIG
    oxidation is loss of electrons
    reduction is gain of electrons

  2. Awesome piece of work. Thanks again.

  3. is it phosphorylation or phosporylation

  4. You have cristae spelled incorrectly as “christae” a couple times in the slide show and in the packet.

  5. Hi, your resources are great! I’m quite new to this site, so I was just wondering where I could find the answer sheet for your practice questions.

    Thank you!

  6. Patrick Youell

    Hi Stephen, on slide 100, you mention that your students should perform and write up the pea respiration lab. However, the design only mentions viable peas, dried peas and glass beads for the independent variable. Does this not provide sufficient data for an IA (min 25 data points and 5 independent variable intervals)? Or if around 10 trails for each are performed, then is this acceptable for IB moderators?


    • Hi Patrick,

      We would not submit this as an IA, but use the data generated to practice processing, presentation and conclusion. In terms of Design it would certainly not be acceptable, but we can use it to teach stats, means, variability, error bars, etc. I don’t currently have an HL class, but when I did this was done early in year 1.

      Personally, I only submit full Design-DCP-CE labs from year 2 as moderation samples, as students at that point are working independently and assessment data are ‘unpolluted’ by me.

      I hope this helps,


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