How would you explain oxidative phosphorylation and chemiosmosis?

Reduced coenzymes produced in the Krebs cycle; glycolysis and Link Reaction (Reduced NAD and FAD) carry Hydrogen ions and electrons to the inner mitochondrial membrane , within the membrane are a number of protein complexes making up an electron transport chain , the electrons are passed along this chain and as they do so energy is lost from them and is used by other coenzymes to pump the H+ ions from the matrix out into the inter membrane space across the membrane, this causes a ph and electrochemical gradient across the membrane and as a result H+ ions move back into the matrix to reduce this gradient (Chemiosmosis) via ion channels which facilitate the conversion of ADP and Pi to ATP via an ATP synthase enzyme. Oxygen acts as the final electron acceptor taking 4 electrons from the last electron carrier and 4 H+ ions from the matrix and forming 2 molecules of H2O

Joseph B. A Level Biology tutor, GCSE Biology tutor, IB Biology tutor...

4 months ago

Answered by Joseph, an A Level Biology tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist


£20 /hr

Runzhi C.

Degree: Medicine (Bachelors) - Imperial College London University

Subjects offered: Biology, Maths+ 3 more

-Personal Statements-
-Medical School Preparation-

“Hi there, I am a first year medical student at Imperial College London and I have lived in the UK all my life. I enjoy studying medicine because it encompasses both scientific knowledge and social aspects. I am relatively new to tutor...”

£20 /hr

Katie A.

Degree: Biomedical Science (Bachelors) - Durham University

Subjects offered: Biology


“I am currently reading Biomedical Science at Durham University and have a real passion for my subject. I would describe myself as calm and patient, as well as fun loving and enthusiastic. I am very comfortable tutoring Biology at GCSE,...”

MyTutor guarantee

£20 /hr

Emma D.

Degree: Philosophy and Psychology (Bachelors) - Durham University

Subjects offered: Biology, Philosophy and Ethics+ 2 more

Philosophy and Ethics
-Personal Statements-

“First year Durham University student with exepertise in Maths, Biology and Religious Studies.  Friendly, dedicated and personable student who has prior experience working as a tutor and advisor. ”

MyTutor guarantee

About the author

£20 /hr

Joseph B.

Degree: Biochemistry (Bachelors) - Southampton University

Subjects offered: Biology, Science+ 3 more


“Top tutor from the renowned Russell university group, ready to help you improve your grades.”

MyTutor guarantee

You may also like...

Other A Level Biology questions

What is transpiration?

What is the difference between the pulmonary and systemic circuits of the cardiovascular system?

Why may a rise in testosterone above normal cause a subsequent decrease in the hormone?

What properties does water possess that make it an essential molecule for life?

View A Level Biology tutors


We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss