11190762
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Quiz von Brooke Nyenhuis, aktualisiert more than 1 year ago
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Erstellt von Brooke Nyenhuis
vor mehr als 6 Jahre
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Frage 1
Frage
How many molecules of water are needed to completely hydrolyze a polymer that is 9 monomers long?
Antworten
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12
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11
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10
-
9
-
8
Frage 2
Frage
The bonding of two amino acid molecules to form a larger molecule requires
Antworten
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the release of a water molecule.
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the release of a carbon dioxide molecule.
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the addition of a nitrogen atom.
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the addition of a water molecule.
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the release of a nitrous oxide molecule.
Frage 3
Frage
All of the following are polysaccharides except
Antworten
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lactose
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glycogen
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chitin
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cellulose
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amylopectin
Frage 4
Frage
The label on a container of margarine lists "hydrogenated vegetable oil" as the major ingredient. What is the result of adding hydrogens to vegetable oil?
Antworten
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The hydrogenated vegetable oil has a lower melting point.
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The hydrogenated vegetable oil stays solid at room temperature.
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The hydrogenated vegetable oil has more "kinks" in the fatty acid chains.
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The hydrogenated vegetable oil has fewer trans fatty acids.
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The hydrogenated vegetable oil is less likely to clog arteries.
Frage 5
Frage
All of the following contain amino acids except
Antworten
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hemoglobin
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cholesterol
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antibodies
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enzymes
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insulin
Frage 6
Frage
At which level(s) of protein structure are interactions between the side chains (R groups) most important?
Antworten
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primary
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secondary
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tertiary
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quaternary
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primary, secondary, tertiary, and quaternary
Frage 7
Frage
Which of the following statements best summarizes the differences between DNA and RNA?
Antworten
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DNA encodes hereditary information, whereas RNA does not.
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The bases in DNA form base-paired duplexes, whereas the bases in RNA do not.
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DNA nucleotides contain a different sugar than RNA nucleotides.
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DNA contains the base uracil, whereas RNA contains the base thymine.
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DNA encodes hereditary information, whereas RNA does not; the bases in DNA form base-paired duplexes, whereas the bases in RNA do not; and DNA nucleotides contain a different sugar than RNA nucleotides.
Frage 8
Frage
The element present in all organic molecules is
Antworten
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hydrogen
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oxygen
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carbon
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nitrogen
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phosphorus
Frage 9
Frage
The experimental approach taken in current biological investigations presumes that
Antworten
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simple organic compounds can be synthesized in the laboratory from inorganic precursors, but complex organic compounds such as carbohydrates and proteins can only be synthesized by living organisms.
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a life force ultimately controls the activities of living organisms, and this life force cannot be studied by physical or chemical methods.
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although a life force, or vitalism, exists in living organisms, this life force cannot be studied by physical or chemical methods.
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living organisms are composed of the same elements present in nonliving things, plus a few special trace elements found only in living organisms or their products.
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living organisms can be understood in terms of the same physical and chemical laws that can be used to explain all natural phenomena.
Frage 10
Frage
How many electron pairs does carbon share in order to complete its valence shell?
Antworten
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1
-
2
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3
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4
-
8
Frage 11
Frage
A carbon atom is most likely to form which of the following bonds with other atoms?
Antworten
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ionic bond
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hydrogen bond
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covalent bond
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covalent bonds and hydrogen bonds
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ionic bonds, covalent bonds, and hydrogen bonds
Frage 12
Frage
Which of the following is not a monomer/polymer pairing?
Antworten
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monosaccharide/polysaccharide
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amino acid/protein
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triglyceride/phospholipid bilayer
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deoxyribonucleotide/DNA
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ribonucleotide/RNA
Frage 13
Frage
Which of these molecules is not formed by dehydration reactions?
Antworten
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fatty acids
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disaccharides
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DNA
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protein
-
amylose
Frage 14
Frage
Which of the following is not a polymer?
Antworten
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glucose
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starch
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cellulose
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chitin
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DNA
Frage 15
Frage
What is the chemical reaction mechanism by which cells make polymers from monomers?
Antworten
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phosphodiester linkages
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hydrolysis
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dehydration reactions
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ionic bonding of monomers
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the formation of disulfide bridges between monomers
Frage 16
Frage
Which of the following is true of cellulose?
Antworten
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It is a polymer composed of enantiomers of glucose.
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It is a storage polysaccharide for energy in plant cells.
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It is digestible by bacteria in the human gut.
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It is a major structural component of plant cell walls.
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It is a polymer composed of enantiomers of glucose, it is a storage polysaccharide for energy in plant cells, it is digestible by bacteria in the human gut, and it is a major structural component of plant cell walls.
Frage 17
Frage
Which of the following statements is true regarding the molecule illustrated in Figure 3.8?
Image:
Fattya (binary/octet-stream)
Antworten
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It is a saturated fatty acid.
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A diet rich in this molecule may contribute to atherosclerosis.
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Molecules of this type are usually liquid at room temperature.
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It is a saturated fatty acid, and a diet rich in this molecule may contribute to atherosclerosis.
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It is a saturated fatty acid, a diet rich in this molecule may contribute to atherosclerosis, and molecules of this type are usually liquid at room temperature.
Frage 18
Antworten
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A
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B
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C
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D
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E
Frage 19
Frage
Which bonds are created during the formation of the primary structure of a protein?
Antworten
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peptide bonds
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hydrogen bonds
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disulfide bonds
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phosphodiester bonds
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peptide bonds, hydrogen bonds, and disulfide bonds
Frage 20
Frage
Which type of interaction stabilizes the α helix and the β pleated sheet structures of proteins?
Antworten
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hydrophobic interactions
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disulfide bonds
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ionic bonds
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hydrogen bonds
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peptide bonds
Frage 21
Frage
The tertiary structure of a protein is the
Antworten
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bonding together of several polypeptide chains by weak bonds.
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order in which amino acids are joined in a polypeptide chain.
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unique three-dimensional shape of the fully folded polypeptide.
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organization of a polypeptide chain into an a helix or b pleated sheet.
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overall protein structure resulting from the aggregation of two or more polypeptide subunits.
Frage 22
Frage
The difference between the sugar in DNA and the sugar in RNA is that the sugar in DNA
Antworten
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is a six-carbon sugar and the sugar in RNA is a five-carbon sugar.
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can form a double-stranded molecule.
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is an aldehyde sugar and the sugar in the RNA is a keto sugar.
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is in the a configuration and the sugar in RNA is in the b configuration.
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contains one less oxygen atom.
Frage 23
Frage
If one strand of a DNA molecule has the sequence of bases 5'ATTGCA3', the other complementary strand would have the sequence
Antworten
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5'TAACGT3'.
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5'TGCAAT3'.
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5'UAACGU3'.
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3'UAACGU5'.
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5'UGCAAU3'.
Frage 24
Frage
Which molecule has hydrophilic and hydrophobic properties and would be found in plasma membranes?
Antworten
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1
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5
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6
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12
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14
Frage 25
Frage
Which of the following combinations could be linked together to form a nucleotide?
Antworten
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1, 2, and 11
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3, 7, and 8
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5, 9, and 10
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11, 12, and 13
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12, 14, and 15
Frage 26
Antworten
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1
-
6
-
10
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14
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15
Frage 27
Antworten
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1
-
5
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6
-
8
-
9
Frage 28
Frage
Which of the following molecules is a purine type of nitrogenous base?
Antworten
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2
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3
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5
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12
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13
Frage 29
Frage
Which of the following molecules act as building blocks (monomers) of polypeptides?
Antworten
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1, 4, and 6
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2, 7, and 8
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7, 8, and 13
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11, 12, and 13
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12, 13, and 15
Frage 30
Frage
Which of the following molecules could be joined together by a peptide bond as a result of a dehydration reaction?
Antworten
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2 and 3
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3 and 7
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7 and 8
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8 and 9
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12 and 13
Frage 31
Frage
A fat (or triacylglycerol) would be formed as a result of a dehydration reaction between
Antworten
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one molecule of 9 and three molecules of 10.
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three molecules of 9 and one molecule of 10.
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one molecule of 5 and three molecules of 9.
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three molecules of 5 and one molecule of 9.
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one molecule of 5 and three molecules of 10.
Frage 32
Frage
Which of the following molecules could be joined together by a phosphodiester type of covalent bond?
Antworten
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3 and 4
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3 and 8
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6 and 15
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11 and 12
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11 and 13
Frage 33
Frage
Which of the following molecules contains a glycosidic linkage type of covalent bond?
Antworten
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4
-
6
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12
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13
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15
Frage 34
Frage
Which of the following molecules consists of a hydrophilic "head" region and a hydrophobic "tail" region?
Antworten
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2
-
5
-
7
-
9
-
11
Frage 35
Antworten
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1 and 4 could be joined together by a glycosidic linkage to form a disaccharide.
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9 and 10 could be joined together by ester bonds to form a triacylglycerol.
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2 and 7 could be joined together to form a short peptide.
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2, 7, and 8 could be joined together to form a short peptide.
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14 and 15 could be joined together to form a polypeptide.
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