Question

LIPID AND MEMBRANE QUESTIONS 1. If an unsaturated fatty acid has 18 carbons, a double bond at position would be in notation - 2. The functional groups which hold fatty acid molecules and glycerol molecules together in triacylglecerol molecules are called: 3. If a triacylglycerol is heated in aqueous sodium hydroxide (lye) solution glycerol and the sodium salts of fatty acids are produced. This mixture of sodium salts of fatty acids is called in common terminology 4. Name the four parts of phosphatidylcholine. and 5. The molecule found in phospholipids which most resembles glucose is: a) lecithin b) inositol c) choline d) kinetic acid 6. A molecule which contains sphingosine bonded to a fatty acid is called 7. A lipid class which contains no fatty acids is called 8. When phosphatidylcholine (lecithin) is sonicated in water it forms 9. Membrane fluidity may be regulated by the degree of unsaturation or by the presence of which molecule? 10. A protein which embeds part way into a membrane, but does not go all the way through would be classed as an) membrane protein. 11. Prostaglandin synthase converts which molecule into prostaglandin H,?_ 12. Movement of a lipid molecule from one side of a membrane to another is called diffusion 13. All pump proteins require which molecule as fuel? 14. The MDR protein belongs to a class of pump proteins called 15. The portion of an ion channel protein which fits a specific ion is called a 16. The sodium-calcium exchange protein found in heart cells is an example of an) 17. Transport across membranes with the concentration gradient which uses channel proteins but no ATP is called 18. Transport proteins which utilize the energy released by transport of one ion or molecule along its concentration gradient to transport a second ion or molecule against its concentration gradient are called transporters. 19. An ion channel which uses acetylcholine binding as a signal to open would be classed as an) gated channel 20. The very toxic compound tetrodotoxin exerts its toxicity sodium channels by

Answer 1

1. Omega - 3 (calculating from CH3 side)

2. Ester functional group ( Formed between 3 - OH of a glycerol with - COOH of fatty acids)

3. Called as Soap and process is called as Saponification

4. - Choline head group - Glycerophosphoric acid - saturated fatty acid - unsaturated fatty acid

5. Inositol

6. Cerebrosides

7. Steriod

8.Liposomes

9. Cholesterol

10. Peripheral protein

11. Arachidonic acid - - - > Prostaglandin H2

12. Transverse diffusion where as lateral diffusion says diffusion within a side of the layer

13. ATP or light

14. Efflux pump - P - glycoprotein

15. Pore forming subunit ( alpha unit , beta unit etc)

16. Calcium efflux mechanism

17. Passive transport

18. Secondary active transport

19. Ligand gated ion channel

20. Binding to the voltage gated Na channel.