Multiple choice

The plasma membrane proteins that cannot be easily extracted from the membrane are__________.

  1. integral proteins

  2. hopanoids

  3. phospholipids

  4. cholesterol

  5. peripheral proteins

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

They are membrane proteins present in plasma membrane. About 70% to 80% of membrane proteins are integral proteins. These are not easily extracted from membrane. Integral proteins are amphipathic. Their hydrophobic regions are buried in the lipid while the hydrophilic portions project from the membrane surface.