Cholesterol is an important component of animal cell membranes. cholesterol molecules are often delivered to body cells by the blood. which transports the molecules in the form of cholesterol- protein complexes. the complexes must be moved into the body cells before the cholesterol molecules can be incorporated into the phospholipid bilayers of cell membranes. based on the information presented, which of the following is the most likely explanation for a buildup of cholesterol molecules in the blood of an animal? the animal's body cells are defective in exocytosis. the animal's body cells are defective in endocytosisy c) the animal's body cells are defective in cholesterol synthesis. (d) the animal's body cells are defective in phospholipid synthesis.

The most likely explanation for a buildup of cholesterol molecules in the blood of an animal is that 'the animal's body cells are DEFECTIVE in endocytosis'.

Endocytosis refers to the movement of molecules from the surrounding cellular environment to the interior of the cell by transport vesicles.

This process (endocytosis) is caused by the invagination of the cell membrane to form an intracellular vesicle that contains extracellular fluid.

Cells absorb cholesterol from their surrounding extracellular environment by receptor-mediated endocytosis.

In conclusion, the most likely explanation for a buildup of cholesterol molecules in the blood of an animal is that 'the animal's body cells are DEFECTIVE in endocytosis'.

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The correct answer is - option B. The animal's body cells are defective in endocytosis.

Explanation:

Endocytosis is the process that internalized the substances inside the cells by the area surrounded by the membrane. This is the process that helps in the internalize cholesterol-protein complexes.

If the cells are not able to perform this then cholesterol-protein would not be internalized by the cell and it will remain in the blood and buildup cholesterol molecule.

Thus, the correct answer is - option B.

it is a. i hope this .