1. What is the reason why molecules with many C-H bonds are insoluble in water? a) b) c) d) e) They are hydrophilic The C-H bond is non-polar The are often large molecules The C-H bond is polar The difference in electronegativity between Cand H is greater than the difference in electronegativity between H and O 2. The two molecules shown below are a) Enantiomers b) Radioactive isotopes Structural isomers d) Isomers with asymmetric carbons e) Cis-trans isomers 3. A large protein has a quaternary structure made up of 5 polypeptide chains. How many carboxyl (C) and amino (N) ends (termini) does the protein have? a) None b) 5 carboxyl and 5 amino ends c)10 carboxyl d) 10 amino e) 1 carboxyl and 1 amino end . Which of the following descriptions is the best describes a nucleoside? a) b) c) d) e) a nitrogenous base and a phosphate group a nitrogenou a nitrogenous base, a phosphate group, and a five carbon sugar a five carbon sugar and a phosphate group the protein complex that allows the movement of molecules in and out of the cell nucleus s base and a five carbon sugar 5. The structural level of a protein least affected by a disruption in hydrogen bonding is the a) Primary b) Secdary c) Tertiary d) Quaternary e) All structural levels are equally affected.