Test Bank for Biology, 13th Edition by Peter Raven- Chapter 5

Test Bank for Biology, 13th Edition by Peter Raven- Chapter 5 What are the four components of cellular membranes? - CORRECT ANSWER-Phospholipid bilayer Transmembrane proteins Integral membrane proteins Cell surface markers (pg. 89&91) Phospholipid structure - CORRECT ANSWER-Structure consists of Glycerol - a 3-carbon polyalcohol 2 fatty acids attached to the glycerol Nonpolar and hydrophobic ("water-fearing") Phosphate group attached to the glycerol Polar and hydrophilic ("water-loving") (pg.92) Saturated fatty acids make the membrane less fluid than unsaturated fatty acids - CORRECT ANSWER- Warm temperatures make the membrane more fluid than cold temperatures - CORRECT ANSWER- What are the membrane Proteins and their functions - CORRECT ANSWER-Transporters (Carrier or channel proteins) Enzymes (chemical reactions on the cell membrane) Cell-surface receptors (chemical messengers detected) Cell-surface identity markers (ID tags; glycoproteins) Cell-to-cell adhesion proteins (temporary interaction btw cells Attachments to the cytoskeleton (surface proteins interacting) How structure relates to functions. - CORRECT ANSWER-Diverse functions arise from the diverse structures of membrane proteins Have common structural features related to their role as membrane proteins Peripheral proteins Anchoring molecules attach membrane protein to surface