“Could you explain this to someone else ? ” Photosynthesis and Respiration - Revision and understanding through self explanation

Recent research shows the effectiveness of self explanation

Try using these cards with a partner to revise respiration and photosynthesis

Print onto card. Cut out, place face down in a pack.

Pick up a card

Explain the concept with a whiteboard or paper.

Use all of the words on each card.

Then look up the concept in a textbook and correct your mistakes.

Work your way through the pack.

Read More

Respiration - Test your understanding, tips, resources and a quiz

Oxygen is the final electron acceptor. It oxidises the final carrier in the ETC on the inner mitochondrial membrane and is reduced to water.

Hydrogen ions flow from the inter membrane space into the matrix via ATP synthase, this electrochemical gradient phosphorylates ADP.

Hydrogen ions are pumped from the matrix into the inter membrane space, using the energy from the electrons flowing along the ETC. The electrons come from the oxidation of food, transferred by coenzymes NAD and FAD.

Glycolysis occurs in the cytoplasm. Link and Krebs in the matrix. Link and Krebs produce carbon dioxide by the removal of a carboxyl group.

Fermentation is just glycolysis with a different way of regenerating NAD (from NADH) by the reduction of pyruvate (or ethanal).

Substrate level phosphorylation is the direct addition of phosphate to ADP, occurs in glycolysis (4 ATP) and Krebs (once per turn), chemiosmosis is H ions flowing through ATP synthase.

Cristae give a larger surface area for oxidative phosphorylation

Read More

Uploaded a set of new Respiration Tutorials to my Youtube Channel - A-level Biology

I have made a series of 9 short (5-7 mins)  video tutorials to try to help students understand glycolysis, link reaction, krebs cycle, anaerobic respiration, oxidative phosphorylation, chemiosmosis and the use of other respiratory substrates.   I hope you find them of use.

Please like and share

Read More