Bio 151 Review Exam Questions and Answers

Bio 151 Review Exam Questions and Answers fats and oils - Answer-super high density, long-term energy storage interaction with water defines boundaries in cells (builds membranes) sterols - Answer-act as biological signals in cells stiffen membranes maintains fluidity (prevents fatty acids from crystallizing) fatty acids - Answer-long carbon/hydrogen chains made from two-carbon units so are often made of 16 or 18 carbons fat - Answer-a large molecule constructed from 2 kinds of smaller molecules: glycerol and fatty acids glycerol - Answer-an alcohol each of its 3 carbons bears a hydroxl group triglycerides - Answer-the resulting fat that consists of 3 fatty acids linked to one glycerol molecule phospholipid - Answer-2 fatty acids + a phosphate group + something else on a glucose molecule no O or N to make it polar hydrophobic on one end and hydrophilic on the other aquaporin - Answer-a protein that allows water to pass through a membrane structure of a protein - Answer-a polymer of amino acid monomers (amino acids hooked in a chain) a carbon with an amino group on the right, a carboxyl group on the left, a hydrogen on the bottom, and a variable group ('R') on the top