Exam 1Review 22/19/17

Review the functional groups and their importance; hydroxyl, carbonyl, carboxyl, amino, phosphate, and sulfhydryl groups

Name the biological macromolecules, their monomers and the type of covalent bonds found in each. How are these polymers made? (Chapter 3 of your text book)

Define the terms hydrolysis and dehydration synthesis.

4. Disulfide bonds are often found to stabilize which of the following levels of protein structure? A) primary B) secondary C) tertiary D) all of the above E) none of the above

5. The primary structure of a protein
A) is important for determining the secondary and tertiary structure of a protein. B) is simply the order of amino acids from one end of the protein to another. C) is important both genetically and structurally. D) is the linear sequence of amino acids that are linked together by peptide bonds. E) all of the above

8) Hydrogen bonding is most important in stabilizing the ________ structure of many proteins. A) primary B) secondary C) tertiary D) quaternary E) all of the above

9 ) Which of the following is not a major functional class of proteins?
A) trifunctional proteins B) enzymes C) motility proteins D) regulatory proteins E) structural proteins

10 ) Which of the following is not a characteristic of DNA?
A) complementarity B) composed of nucleotides C) contains ribose D) antiparallel strands
E) double-stranded

11 ) The nucleoside triphosphate molecules in DNA are linked togethe r in the 5'→3' by a(n) _______ bridge. A) phosphate B) covalent C) phosphodiester D) peptide E) phosphatidyl

12 ) The term amphipathic describes the characteristic of some molecules that have ________. A) two polar regions B) only a single polar region C) both a polar and a nonpolar region D) no polar regions E) two nonpolar regions

13 ) Lipid rafts are
A) regions of the membrane that are high in sphingolipids , which facilitate communication
with the external environment of the cell. B) important regions of membrane structure and are comprised of phospholipids. C) regions not typically associated with signal transduction.
D) regions where greater concentrations of sphingolipids are on the inner side of the membrane. E) great for white-water rafting.

Short Answer Questions

1 4 ) ________ is the major storage polysaccharide for animals, while ________ is the major storage polysaccharide for plants.

15 ) A ________, a ________, and a ________ are the major parts of a nucleotide, whereas a ________ and a ________ are the major parts of a nucleoside.

16 ) Nucleotides are to nucleic acids as amino acids are to ________.

17 ) Triglycerides are composed of three fatty acids attached to a molecule of ________.

18 ) ________ RNA is a component of the ribosomes that serve as the site of protein synthesis

19 ) Cellulose is a polymer of ________, a common monosaccharide.

20 ) ________ and ________ are the two kinds of sugars found in bacterial cell walls