Questions: B Canvas Unit 3 Canvas Quiz - Requires Respondus LockDown Browser Started: Sep 20 at 12:35pm Quiz Instructions Question 6 The cell structures responsible for membrane transport are proteins. carbohydrates. steroids. phospholipids. Quiz saved at 12

B Canvas Unit 3 Canvas Quiz - Requires Respondus LockDown Browser Started: Sep 20 at 12:35pm Quiz Instructions Question 6 The cell structures responsible for membrane transport are proteins. carbohydrates. steroids. phospholipids. Quiz saved at 12
Transcript text: B Canvas Unit 3 Canvas Quiz - Requires Respondus LockDown Browser Started: Sep 20 at 12:35pm Quiz Instructions Question 6 The cell structures responsible for membrane transport are proteins. carbohydrates. steroids. phospholipids. Quiz saved at 12
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Solution

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The answer is the first one: proteins.

Explanation for each option:

  1. Proteins: Correct. Membrane transport proteins, such as channel proteins and carrier proteins, are crucial for the movement of substances across the cell membrane. They facilitate both passive and active transport mechanisms.
  2. Carbohydrates: Incorrect. Carbohydrates are primarily involved in cell recognition and signaling, not in the direct transport of substances across the membrane.
  3. Steroids: Incorrect. Steroids, such as cholesterol, play a role in maintaining membrane fluidity and stability but are not directly responsible for membrane transport.
  4. Phospholipids: Incorrect. Phospholipids form the basic structure of the cell membrane (the lipid bilayer) but do not actively transport substances across the membrane.

Summary: The cell structures responsible for membrane transport are proteins.

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