Question

Which of the following is NOT true of receptor-mediated endocytosis?

A. In receptor-mediated endocytosis, extracellular substances are internalized in clathrin- coated vesicles.
B. Low-density lipoproteins (LDLs) are taken into cells by receptor-mediated endocytosis.
C. Some viruses are taken into the cell by receptor-mediated endocytosis.
D. In receptor-mediated endocytosis, internalized vesicles fuse with lysosomes, which then mature into endosomes.

Answer 1

Receptor-mediated endocytosis is a process in which extracellular substances are internalized in clathrin-coated vesicles. LDLs are taken into cells through receptor-mediated endocytosis, as are some viruses. Internalized vesicles fuse with lysosomes, which mature into endosomes.

Step-by-step explanation:

Receptor-mediated endocytosis is a cellular process in which extracellular substances are internalized in clathrin-coated vesicles. This process allows cells to selectively take in specific substances by binding to receptors on the cell membrane. Low-density lipoproteins (LDLs) are indeed taken into cells by receptor-mediated endocytosis.

Additionally, some viruses are also taken into cells through this mechanism. In receptor-mediated endocytosis, the internalized vesicles do fuse with lysosomes, which then mature into endosomes.