Question

question 16 1 pts the identification function of the cell membrane is carried out by the: cholesterol molecules. phospholipid molecules. glycoprotein molecules. channel proteins. question 17 1 pts the cell extension that assists epithelial cells in absorption is called: cilia. flagella. microvilli. desmosomes. question 18 1 pts which cell fiber serves as part of our \cellular muscles?\ centrosome microfilament microtubule intermediate filament

Explanation:

• Question 16: Glycoprotein molecules on the cell - membrane have carbohydrate chains that act as identification tags, allowing cells to recognize each other. Cholesterol molecules mainly affect membrane fluidity, phospholipid molecules form the basic structure of the membrane, and channel proteins are for transport.
• Question 17: Microvilli are small, finger - like projections on the surface of epithelial cells that increase the surface area for absorption. Cilia are for movement of substances along the cell surface, flagella are for cell movement, and desmosomes are cell - to - cell junctions.
• Question 18: Microfilaments, made of actin, are involved in cell movement and contraction, functioning as part of the "cellular muscles". Centrosomes are involved in cell division, microtubules are part of the cytoskeleton for maintaining cell shape and intracellular transport, and intermediate filaments provide mechanical strength.

Answer:

Question 16: Glycoprotein molecules.
Question 17: Microvilli.
Question 18: Microfilament.