Chapter 4, Problem 6SC

Phospholipases act on which type of lipid? A. glycolipids B. triacylglycerols C. glycerolophospholipids D. sphingolipids

Which of the following is NOT a function of one or more types of protein? A. Transport B. Enzymes C. Storing genetic information D. Hormones

Which of the following can be a lipid based structure?   A. Antibody B. Enzyme C. Hormone D. Neurotransmitter

Phosphatidylinositol 4,5-bisphosphate (PIP2) is a __________ that carries a net __________ charge.   A. glycerophospholipid;  -1   B. glycerophospholipid;  -2   C. glycerophospholipid;  -4   D. sphingolipid;  -2   E. sphingolipid;  -3

Which of the following is NOT a function of proteins in the human body? A. Energy source B. Signal transduction C. Insulation D. Catalyzing metabolic reactions

Which of the following statements concerning fatty acids is correct? a. Used to make phospholipids b. They all contain one or more double bonds. c. They are a constituent of sterols. d. They are strongly hydrophilic.

Which of the following is a class of molecules that encompasses all of the other molecules listed? a. triglycerides c. waxes e. lipids b. fatty acids d. steroids f. phospholipids

Which of the following are essential components of cell membrane? a. Cholesterol b.Phospholipids c.Long chain polyunsaturated fatty acids d.All of the above

Statements:(1) Fats and oils have the same general chemical structure.(2) Biological waxes have a three-component “block diagram.”(3) In facilitated transport, a substance crosses a cell membrane with the help of a protein “pump.” a. All three statements are true. b. Two of the three statements are true. c. Only one of the statements is true. d. None of the statements is true.