Edexcel iGCSE biology respiration worksheet and written question revision notes

I’ve found respiration is one of the most important things for students to get right studying biology. The equations are so important, but many GCSE and even some weaker A-level biology students can’t instantly give them. I explain to students that they’re an instant grade boost.

Here’s a worksheet and set of notes on one page on the most common respiration questions. There’s the word equations, a guide through the standard question about how your heart and breathing rate change with exercise, and there’s links to some recommended videos. Versions included for colour and black and white printing. Full mark scheme included with the worksheet.

Remembering the equations for respiration is one of the last things I always go over with students just before their exams, because it’s such a morale booster to instantly get full marks on one of these questions. I will never forget what one student told me in 2021: “It came up! Exactly what you said, it came up!”

This set of notes targets Edexcel 9-1 iGCSE biology and uses lactate as the standard term rather than lactic acid. I have a version targeted towards other GCSEs such as the AQA course as well.

Questions consulted as models for answers included the 1B 2019 and 1BR 2020 papers and 2B 2017.