Molecules found in an animal cell membrane include A - VCE - SSCE Biology - Question 4 - 2006 - Paper 1

To address this question, we evaluate each option based on what is typically found in an animal cell membrane.

• Chitin: This is a structural polysaccharide found primarily in the exoskeletons of arthropods and the cell walls of fungi; it is not a component of animal cell membranes.

• Cellulose: This is another polysaccharide, predominantly found in the cell walls of plants, and therefore it is also absent in animal cell membranes.

• Cholesterol: This molecule is a vital component of animal cell membranes. It plays a crucial role in maintaining membrane fluidity and stability, making it essential for proper membrane function.

• Nucleotides: While nucleotides are the building blocks of nucleic acids, they are not components of cell membranes.

Thus, the correct choice is C. cholesterol.