Multiple choice

What is the process for the efficient uptake of macromolecules for which the cell has specific receptors on its surface?

  1. Bulk phase endocytosis

  2. Phagocytosis

  3. Diffusion

  4. Receptor mediated endocytosis

  5. Osmosis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

It is the main mechanism for the specific uptake of most macromolecules by eukaryotic cells. Depending on the cell type, mammalian cells take in hormones, growth factors, enzymes, serum proteins, antibodies, and even some viruses and bacterial toxins by this mechanism. The uptake of LDL occurs by receptor mediated endocytosis.

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