23. What are the nonpolar parts of a phospholipid? A) Head group B) Tail group C

Question

23. What are the nonpolar parts of a phospholipid? A) Head group B) Tail group C) Both are nonpolar D) Neither are nonpolar 24. This portion of the cell membrane enables cell membranes to produce chemical products.. A) Receptors B) Phospholipids C) Cholesterol D) Enzymes E) Ligand 25. Which of the following is a function of a membrane protein that binds with hormones and neurotransmitters? A) Transporters B) Receptors C) Enzymes D) Linkers E) Cell Identification markers This is a measure of a solutions ability to change the volume of cells by altering their water content. A) Hypermess B) Hyponess C) Tonicity D) Pressure E) Facilitation 26. 27. This is the transport process by which gases move through a membrane. A) Osmosis B) Active transport C) Secondary active transport D) Simple diffusion E) Endocytosis

Explanation / Answer

23) tail is non polar which is hydrophobic which repellsrepell where as head is polar and hydrophilic which attrats water.

24) Receptors with the help of ligands produce chemical cpounds.

27) gases move through process of diffusion. Which is called as simple diffusion.

26) C tonicity defines as the ability of an extracellular solution to make water move into or out of a cell by osmosis is know as its tonicity.

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