Skip to content
Clear highlightsClear Highlight Report a problem

Sites of Chemical Reactions

Proteins embedded in the membranes of organelles such as chloroplasts and mitochondria are involved in chemical reactions.For example, electron carriers embedded in the folded inner mitochondrial membrane, the cristae, are involved in the production of ATP by respiration.The enzyme and proton channel ATP synthase is a transmembrane protein that converts ADP and inorganic phosphate into ATP during respiration and photosynthesis.ATP synthase is found in the inner mitochondrial membrane and in the thylakoid membranes in chloroplasts.

Read the text

Read the text and highlight anything you think is important. When you go on, the text is hidden and you answer from memory.

Next

Specification: OCR Biology A (H020), AS-level, 2.1.5 Biological membranes. Topic: Plasma Membrane.

Key terms in this lesson

organelle
A membrane-bound structure within a cell with a specific structure suited to a specific function.
mitochondrion
An organelle with a double membrane, the inner one folded into cristae, that is the site of aerobic respiration and ATP production.
cristae
The folds of the inner mitochondrial membrane that increase the surface area for the reactions of aerobic respiration.
ATP
Adenosine triphosphate, a nucleotide that acts as the immediate energy source of a cell, releasing energy when hydrolysed to ADP and inorganic phosphate.

More in Plasma Membrane

All 18 lessons in Plasma Membrane · All OCR AS-level Biology topics