U05_F08 - Unit 5 1 UNIT 5 MEMBRANES AND MEMBRANE PROTEINS...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Unit 5 1 U NIT 5 M EMBRANES AND M EMBRANE P ROTEINS Note: The test for this unit is combined with the test for Unit 4. Membranes define the external boundary of cells and regulate it's molecular traffic. They divide the internal space of the cell into discrete compartments. Membranes are not merely passive barriers but house an array of proteins specialized for promoting or catalyzing a variety of molecular events. Pumps move specific organic solutes and inorganic ions across the membrane against a concentration gradient; energy transducers convert one form of energy into another, and receptors on the plasma membrane sense extracellular signals. These ideas will be reviewed in this unit and studied in more depth in Unit 12. Assignment: Nelson & Cox, pp. 343 - 345, 349 (start at section 10.2) - 350 (stop at "Some glycerophospholipids have ether linked fatty acids"), 351, 355 - 357 ("sterols have four fused carbon rings"), 371 - 386 (stop at "caveolins. ..."), 389 - 391 (stop at "The Glucose Transporter…."), 396 - 399 (P-type ATPases). 1. Given the total number of carbons, and the number and positions of double bonds, draw the structure of a straight-chain fatty acid (pp. 343 - 345; note the conventions for positions of double bonds).
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Unit 5 2 2. Representing the structure of a fatty acid as shown below, draw the structure of a phosphatidate (diacylglycerol 3-phosphate; p. 351). R-C-OH O a. What kind of linkage joins the fatty acids to the glycerol part of the molecule? b.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

U05_F08 - Unit 5 1 UNIT 5 MEMBRANES AND MEMBRANE PROTEINS...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online