CHAPTER 3, CHEMISTRY OF ORGANIC MOLECULES QUIZ
_____1. Which of the following is Not one
of the four most common elements found in living organisms?
a) hydrogen b) oxygen
c) carbon d) sulfur d) nitrogen
_____2. Organic molecules are those that contain at least
a) carbon
c) carbon and oxygen
b) carbon and hydrogen
d) carbon, oxygen, and hydrogen
_____3. What term is used for molecules that have identical
molecular formulas but the atoms
in each molecule are arranged differently?
a) isotopes b) isomer c)
homomolecules d) organic
e) balanced
4. Which is Not an isomer of the other three?
a) glucose b) ribose
c) fructose d) galactose
_____5. A polysaccharide is a polymer made up of which
kind of monomers?
a) simple sugars
b) amino acids
c) nucleotides
d) alternating sugar and phosphate groups
e) fatty acids and glycerol
_____6. A lipid is a polymer made up of which kind of
monomers?
glucose or modified glucose molecules
a) amino acids
c) nucleotides
b) alternating sugar and phosphate groups
d) fatty acids and glycerol
_____7. A dehydration synthesis reaction is also known
as
a) a condensation reaction
b) a hydrolysis reaction
c) an isomeric reaction
d) an energy releasing reaction
e) monomer formation
_____8. Which pair are both structural carbohydrate molecules?
a) starch and glycogen
b) starch and cellulose
c) glycogen and cellulose
d) cellulose and chitin
e) glycogen and chitin
_____9. Which carbohydrate is found in the cell walls
of plants?
a) starch b) chitin
c) cellulose d) glycogen e) glycerol
_____10. Which carbohydrate is used in the liver for energy
storage?
a) starch b) chitin
c) cellulose d) glycogen e) glycerol
_____11. Which carbohydrate is found in the exoskeleton
of insects and crabs?
a) starch b) chitin
c) cellulose d) glycogen e) glycerol
_____12. Which lipid does Not contain at
least some subunits similar to those in the others?
a) steroids b) neutral fats
c) waxes d) phospholipids
_____13. Which of the following lipids form a bilayer
between two watery regions, such
as the plasma membrane of a cell?
a) steroids b) neutral fats
c) waxes d) phospholipids
_____14. Cholesterol belongs to which of the following
groups?
a) steroids b) neutral fats
c) waxes d) phospholipids
_____15. If an animal needed to store energy for long
term use, but not be encumbered
with the weight of extra tissue, which is the best molecule
for storage?
a) fructose and glucose in the form of honey
b) high calorie fat molecules
c) complex cellulose molecules
d) starch
e) glycogen with extensive side branches of glucose
_____16. A protein is a polymer made up of which kind
of monomers?
a) glucose and modified glucose molecules
b) amino acids
c) nucleotides
d) alternating sugar and phosphate groups
e) fatty acids and glycerol
_____17. A peptide bond is found in which type of biological
molecule?
a) carbohydrate b) lipid
c) nucleic acid d) protein
_____18. The alpha helix and beta sheet are found at which
level of protein organization?
a) primary structure b) secondary structure
c) tertiary structure d) quaternary structure
_____19. A nucleic acid is a polymer made up of which
kind of monomers?
a) amino acids
b) nucleotides
c) glucose or modified glucose molecules
d) alternating sugar and phosphate groups
e) fatty acids and glycerol
_____20. Which of these statements is Not
true about DNA?
a) It is the genetic material of the cell.
b) It forms a double helix.
c) Adenine pairs with thymine and guanine pairs with
cytosine.
d) It contains the sugar ribose.
e) The sugar and phosphate groups form the backbone of
the molecule.
_____21. Which statement is true about RNA?
It contains adenine paired to thymine.
One of the bases from DNA is replaced by uracil.
It contains the sugar deoxyribose.
Its nucleotides contain twice as many phosphate groups
as DNA's nucleotides.
It is a double stranded molecule.
_____22. Which of these is Not a characteristic
of carbon?
a) forms four covalent bonds
b) bonds with itself
c) is sometimes ionic
d) forms long chains
e) sometimes shares two pairs of electrons with another
atom
_____23. The difference between one amino acid and another
is found in the
a) amino group b) carboxyl group
c) R group d) peptide bond e) carbon atoms
_____24. The shape of a polypeptide is
a) maintain by bonding between parts of the polypeptide
b) important to its function
c) ultimately dependent upon the primary structure
d) necessary to its function
e) All of these are correct.
_____25. Nucleotides
a) contain a sugar, a nitrogen containing base, and a
phosphate molecule
b) are the monomers for fats and polysaccharides
c) joined together by covalent bonding between bases
d) are present in both DNA and RNA
e) Both a and d are correct.
_____26. ATP
a) is an amino acid
b) has a helical structure
c) is a high energy molecule that can break down to ADP
and phosphate
d) provides enzymes for metabolism
e) is most energetic when in the ADP state
_____27. Which of the following is Not associated
with carbohydrates?
a) amylase b) cellulose
c) pepsin d) chitin e) insulin
_____28. The union of glycerol and fatty acids to form
fat is an example of what kind of reaction?
a) endergonic reaction b) exergonic reaction
c) dehydration reaction d) hydrolysis reaction
e) redox reaction
_____29. Which of the following is Not a
compound composed of glucose?
a) chitin b) glycogen
c) starch d) glucagon e) cellulose
_____30. A disaccharide is
a) A complex protein found in plants.
b A basic building block of life.
c) The group to which glucose belongs.
d) A sugar consisting of two monosaccharides.
e) A sugar in its simplest form.
_____31. When identical chemical groups are bonded to
different atoms in two molecules, such as
glucose and galactose, these are examples of
a) monosaccharides b) polymers
c) monomers d) structural isomers e)
steroisomers
_____32. During a chemical reaction, the loss of an electron
from an atom or molecule is termed
a) reduction b) cellular respiration
c) kinetics d) oxidation e) metabolism
_____33. Of the following functional chemical groups,
which is the only one that contains nitrogen?
a) carboxyl b) amino
c) methyl d) hydroxyl e) sulfhydryl
_____34. Adenine, a nitrogen base, is found in all of
the following Except
a) RNA b) DNA c)
ATP d) cAMP e) amino acids
_____35. A reaction that breaks down compounds by the
addition of water is known as a
a) hydrolysis reaction b) dehydration reaction
c) endergonic reaction d) exergonic reaction e)
redox reaction
_____36. Which of the following is Not a
lipid?
a) steroids b) fats
c) phospholipids d) glycogen e) cholesterol
_____37. A compound contains a COOH group. What functional
group is that?
a) amino group b) carbonyl group
c) carboxyl group d) hydroxyl group e) phosphate
group
_____38. Polymers of sugars are called
a) proteins b) polysaccharides
c) fats and oils d) nucleic acids e)
polypeptides
_____39. Large molecules that are composed of repeating
units of small molecules are called
a) monomers b) polymers
c) repeaters d) macrophages e) polycarbonates
_____40. Polymers of amino acids are called
a) starches b) polysaccharides
c) fats and oils d) nucleic acids e)
polypeptides
_____41. The characteristic that is shared by all organic
molecules is that they
a) have sulfur.
b) have a ring structure.
c) are derived from crude oil.
d) are manufactured in organic chemistry laboratories.
e) are made of chains of carbon atoms.
_____42. The small repeating units of large molecules
are called
a) monomers b) polymers
c) repeaters d) macrophages e) polycarbonates
_____43. Polymers of nucleotides are called
a) starches b) polysaccharides
c) fats and oils d) nucleic acids e)
polypeptides
_____44. An example of a polypeptide is
a) table sugar b) protein
c) olive oil d) cellulose e) corn starch
_____45. The most predominant component of biological
membranes are
a) lipids b) sugars
c) nucleic acids d) starches e) oils
_____46. The biological functions of molecules are determined
by their
a) shapes
b) charge distributions
c) ability to interact with water
d) structures
e) All of the above.
_____47. Standard, small groupings of atoms on molecules
that help to determine its properties are called
a) competent sites b) functional groups
c) portals d) interfaces e) remainder
groups
_____48. Organic acids are characterized by which functional
group
a) amino b) carboxyl
c) hydroxyl d) keto e) aldenhyde
_____49. The most important biological properties of a
molecule depend on its interactions with
a) proteins b) sugars
c) water d) membranes e) DNA
_____50. Molecules that contain both amino and carboxyl
groups are
a) sugars b) amino acids
c) nucleotides d) starches e) lipids
_____51. Molecules that each consists of a nitrogen-containing
aromatic ring compound, a sugar,
and a molecule of phosphoric acid are
a) sugars b) amino acids
c) nucleotides d) starches e) lipids
_____52. When all the bonds between the carbons of a hydrocarbon
are single bonds, and it contains
the maximum number of hydrogen atoms it is said to be
a) saturated b) complimented
c) polycarbonated d) impregnated e)
unsaturated
_____53. The most important simple sugar in almost all
living organisms is
a) sucrose b) glucose
c) fructose d) starch e) cellulose
_____54. Choose the one item from the following lists
is Not one of the parts of a nucleotide.
a) ribose b) deoxyribose
c) lipid d) nitrogenous base e) phosphate
_____55. The are a total of ____ naturally occurring amino
acids in cells.
a) 4 b) 5 c) 8
d) 10 e) 20
_____56. The biological role of a protein depends on
a) its sequence of amino acids
b) the pattern of folding of the amino acids
c) other protein molecules with which it is associated
d) its three-dimensional shape
e) All of the above.
_____57. The amino acid sequence of protein is the level
of protein structure called the ____ structure.
a) primary b) sequential
c) secondary d) quaternary e) tertiary
_____58. The three-dimensional arrangement of the polypeptide
chains that compose the protein is the
level of protein structure called the _____ structure.
a) primary b) sequential
c) secondary d) quaternary e) tertiary
_____59. The three-dimensional folding of an entire polypeptide
chain is the level of protein
structure called the ____ structure.
a) primary b) sequential
c) secondary d) quaternary e) tertiary
_____60. The fitting together of two or more folded amino
acid chains is the level of protein
structure called the ____ structure.
a) primary b) sequential
c) secondary d) quaternary e) tertiary
_____61. A chain of amino acids that is wound into a single,
coiled strand is an example of a
secondary protein structure called a(n)
a) isomeric coil b) collagen helix
c) alpha helix d) helicoid cyme e)
beta sheet
_____62. An amino acid chain that forms a zig-zap pattern
is an example of a secondary
protein structure called a(n)
a) isomeric coil b) collagen helix
c) alpha helix d) helicoid cyme e)
beta sheet