Multiple choice

Which of the following is a water soluble substance that needs the help of the various proteins for transport?

  1. Oxygen

  2. Aminoacids

  3. Carbon dioxide

  4. Steroids

  5. Lipids
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The plasma membrane allows only lipid-soluble substances to pass through it. Water-soluble substances such as glucose, amino acids, ions and water can pass through the plasma membrane with the help of the various proteins. Amino acid permeases are integral membrane proteins involved in the transport of amino acids into the cell.

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