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Alchen [17]
4 years ago
7

Which molecules may diffuse across a cell membrane without the expenditure of energy or the use of membrane proteins?

Biology
1 answer:
wel4 years ago
6 0

Explanation:

In simple diffusion, small molecules without charges such as oxygen and carbon dioxide flow through a plasma membrane without assistance and without expending energy. Other substances such as proteins, glucose and charged particles called ions cannot pass through the selectively permeable membrane

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