Answer the following multiple choice questions
Protein monomers have two key functional groups:
a. amine group and hydroxyl group. b. amine group and carbonyl group. c. carbonyl group and hydroxyl group. d. amine group and carboxyl group. e. carbonyl group and carboxyl group.
The triglyceride is formed by
Select one: a. a peptide bond. b. an ester linkage. c. a glycosidic linkage. d. a sulfhydryl bond. e. a diester bond.
What part of amino acid is unique to each type? Select one: a. the R group b. amine functional group c. carboxyl functional group d. carbonyl functional group e. the central atom
Some biochemical reactions require a cofactor such as a Select one: a. vitamin. b. buffer. c. organic ions. d. metal ion. e. carbohydrate.
The primary structure of a protein describes
Select one: a. the R groups involved. b. the linear sequence of amino acids. c. the polarity of amino acids. d. the hydrogen bonding between amino acids. e. complex folding.
Nucleic acids are polymers made of Select one: a. monosaccharides. b. glycerides. c. amino acids. d. nucleotides. e. None of the above.
How do the bases of opposite DNA strands connect?
Select one: a. A-C; G-T b. C-G; T-U c. A-C; G-U d. A-T: C-G e. C-U; G-T
When mixed with water, hydrophobic molecules will Select one: a. dissolve. b. clump together. c. form a precipitate. d. dissociate. e. not enough information provided.
What feature of lipids makes them good sources of energy?
Select one: a. They do not dissolve easily in water. b. They are easy to access by metabolic processes. c. They are rich in C-H bonds. d. They are large. e. They accumulate into specialized organelles.
Animal starch, glycogen, is highly branched so that Select one: a. it is more quickly broken into monomers. b. it is more loosely packed. c. it forms strong structures in the liver. d. it is not green. e. all of the above.
Protein structure can be organized into how many levels?
Select one: a. one b. two c. three d. four e. five
Which of these molecules is a hydrocarbon?
Select one: a. CO2 b. H2O c. CCl4 d. C6H12O6 e. CH4
Condensation reactions involve
Select one: a. production of salt and water. b. synthesis of bonds. c. the breaking of water. d. decomposition of a large molecule. e. evaporation of water in an aqueous solution.
Which of these molecules is a disaccharide? Select one: a. glucose b. fructose c. galactose d. sucrose e. cellulose
A neutral solution has a pH of
Select one: a. 2 b. 5 c. 6 d. 7 e. 8
Hydrophilic molecules have a tendency to
Select one: a. form aqueous solutions. b. dissolve in water. c. form hydrogen bonds with water. d. be polar. e. all of the above.
Which of these functions is NOT related to lipids? Lipids can
Select one: a. form a protective cushion around major organs. b. dissolve easily in water. c. form much of a cell membrane. d. insulate against heat. e. provide water-repelling coatings.
Lipids and carbohydrates are both macromolecules. Lipids are different from carbohydrates because they
Select one: a. have many non-polar bonds. b. consist of hydrogen, carbon, oxygen and nitrogen. c. form cellular structures. d. consist of hydrogen, carbon and oxygen. e. dissolve easily in water.
A nucleotide consists of a nitrogenous base and
Select one: a. a phosphate group and a fatty acid. b. a fatty acid and a sugar. c. an amino acid and a sugar. d. a phosphate group and a sugar. e. an amino acid and a phosphate group.
Oxidation reduction reactions involve
Select one: a. the transfer of H+ ions. b. the transfer of electrons. c. the transfer of protons. d. the movement of charge on a large ion. e. None of the above.
Protein folding is affected by Select one: a. molecular chaperones. b. hydrogen bonding between R groups. c. the hydrophobic effect. d. All of these. e. None of these.
A functional group is
Select one: a. a complex molecule made of repeating units. b. a nonpolar segment. c. many monomers linked together. d. a cluster of atoms that behave in a certain way. e. all of the above.
Competitive inhibitors
Select one: a. act like the active site and take substrates away from the enzyme. b. change the shape of the enxyme by binding at the allosteric site. c. combine with substrate molecules. d. combines with the active site of the enzyme. e. None of the above.
Which of these functional groups is polar, acidic? Select one: a. hydroxyl b. carbonyl c. carboxyl d. amino e. phosphate
The monomer for a protein is a
Select one: a. monosaccharaide. b. nucleotide. c. amino acid. d. fatty acid. e. triglyceride.
The monomer for a nucleic acid is a
Select one: a. monosaccharaide. b. nucleotide. c. amino acid. d. fatty acid. e. triglyceride.
Quaternary structure describes Select one: a. the formation of protein sheets. b. the formation of helical shapes. c. the combination of two different folded chains. d. extensive branching. e. a form of denaturing into a linear string of amino acids.
Water is a polar covalent molecule. This means that
Select one: a. electrons are shared unequally. b. hydrogen is partially charged. c. oxygen is more electronegative. d. electrons are less attracted to the hydrogen nucleus. e. All of the above.
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