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Cells

The cellular membrane is composed of a lipid bilayer. Carbs and proteins are used by cells and have to pass through this layer.

2006-12-04 17:32:55 · answer #1 · answered by Aegis 4 · 0 0

Every single cell uses every single one of those molecules.

2006-12-05 01:32:58 · answer #2 · answered by Brian B 4 · 0 0

liver and muscle use these to generate energy in the form of ATP and liver is also able to catabolise and anabolise them

2006-12-05 06:16:34 · answer #3 · answered by mrinal p 1 · 0 0

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