Chloroplasts

OCR AS-level BiologyCell StructureLesson 19 of 26

Chloroplasts are found in the leaves and stem of roots and are the site of photosynthesis.

They consist of a double membrane enclosing stacks of flattened sacs called thrylakoids, linked together by membranes called lamellae.

Each stack is called a granum.

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ATP: Adenosine triphosphate, a nucleotide that acts as the immediate energy source of a cell, releasing energy when hydrolysed to ADP and inorganic phosphate.