Question

1. what is the main function of carrier proteins? a. signal transduction b. structural support c. facilitated diffusion d. energy production 15. glycolipids and glycoproteins are a type of: a. protein pump b. protein channel c. integral protein d. peripheral molecule 16. the role of integral proteins in the cell membrane is: a. only structural support b. only signaling c. transporting substances across the membrane d. only enzymatic activities 17. the primary composition of the cell membrane provides: a. flexibility and fluidity b. rigidity and fixed shape c. inflexibility and strength d. static and unmoving structure 18. the hydrophobic tails of phospholipids are oriented: a. towards the water b. away from each other c. both towards and away from the water d. towards each other 19. the main function of antibodies is to: a. transport ions b. catalyze biochemical reactions c. recognize and bind to antigens d. provide structural support 20. facilitated diffusion moves molecules from: a. a high to low concentration b. a low to high concentration c. a high to high concentration d. a low to low concentration

Explanation:

1. Carrier proteins are involved in facilitated diffusion, which is a type of passive transport.
2. Glycolipids and glycoproteins are integral proteins that are embedded in the cell membrane.
3. Integral proteins in the cell membrane can transport substances across the membrane.
4. The primary composition of the cell membrane (phospholipids) provides flexibility and fluidity.
5. The hydrophobic tails of phospholipids are oriented towards each other to avoid water.
6. Antibodies recognize and bind to antigens.
7. Facilitated diffusion moves molecules from a high to low concentration.

Answer:

1. C. Facilitated diffusion
2. C. Integral Protein
3. C. Transporting substances across the membrane
4. A. Flexibility and fluidity
5. D. Towards each other
6. C. Recognize and bind to antigens
7. A. a high to low concentration