11190762
Descripción
Test por Brooke Nyenhuis, actualizado hace más de 1 año
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Creado por Brooke Nyenhuis
hace alrededor de 7 años
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Pregunta 1
Pregunta
How many molecules of water are needed to completely hydrolyze a polymer that is 9 monomers long?
Respuesta
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12
-
11
-
10
-
9
-
8
Pregunta 2
Pregunta
The bonding of two amino acid molecules to form a larger molecule requires
Respuesta
-
the release of a water molecule.
-
the release of a carbon dioxide molecule.
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the addition of a nitrogen atom.
-
the addition of a water molecule.
-
the release of a nitrous oxide molecule.
Pregunta 3
Pregunta
All of the following are polysaccharides except
Respuesta
-
lactose
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glycogen
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chitin
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cellulose
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amylopectin
Pregunta 4
Pregunta
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?
Respuesta
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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.
Pregunta 5
Pregunta
All of the following contain amino acids except
Respuesta
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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
Pregunta 6
Pregunta
At which level(s) of protein structure are interactions between the side chains (R groups) most important?
Respuesta
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primary
-
secondary
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tertiary
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quaternary
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primary, secondary, tertiary, and quaternary
Pregunta 7
Pregunta
Which of the following statements best summarizes the differences between DNA and RNA?
Respuesta
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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.
Pregunta 8
Pregunta
The element present in all organic molecules is
Respuesta
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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
Pregunta 9
Pregunta
The experimental approach taken in current biological investigations presumes that
Respuesta
-
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.
-
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.
Pregunta 10
Pregunta
How many electron pairs does carbon share in order to complete its valence shell?
Respuesta
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1
-
2
-
3
-
4
-
8
Pregunta 11
Pregunta
A carbon atom is most likely to form which of the following bonds with other atoms?
Respuesta
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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
Pregunta 12
Pregunta
Which of the following is not a monomer/polymer pairing?
Respuesta
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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
Pregunta 13
Pregunta
Which of these molecules is not formed by dehydration reactions?
Respuesta
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fatty acids
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disaccharides
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DNA
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protein
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amylose
Pregunta 14
Pregunta
Which of the following is not a polymer?
Respuesta
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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
Pregunta 15
Pregunta
What is the chemical reaction mechanism by which cells make polymers from monomers?
Respuesta
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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
Pregunta 16
Pregunta
Which of the following is true of cellulose?
Respuesta
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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.
Pregunta 17
Pregunta
Which of the following statements is true regarding the molecule illustrated in Figure 3.8?
Image:
Fattya (binary/octet-stream)
Respuesta
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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.
Pregunta 18
Respuesta
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A
-
B
-
C
-
D
-
E
Pregunta 19
Pregunta
Which bonds are created during the formation of the primary structure of a protein?
Respuesta
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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
Pregunta 20
Pregunta
Which type of interaction stabilizes the α helix and the β pleated sheet structures of proteins?
Respuesta
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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
Pregunta 21
Pregunta
The tertiary structure of a protein is the
Respuesta
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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.
Pregunta 22
Pregunta
The difference between the sugar in DNA and the sugar in RNA is that the sugar in DNA
Respuesta
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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.
Pregunta 23
Pregunta
If one strand of a DNA molecule has the sequence of bases 5'ATTGCA3', the other complementary strand would have the sequence
Respuesta
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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'.
Pregunta 24
Pregunta
Which molecule has hydrophilic and hydrophobic properties and would be found in plasma membranes?
Respuesta
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1
-
5
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6
-
12
-
14
Pregunta 25
Pregunta
Which of the following combinations could be linked together to form a nucleotide?
Respuesta
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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
Pregunta 26
Respuesta
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1
-
6
-
10
-
14
-
15
Pregunta 27
Respuesta
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1
-
5
-
6
-
8
-
9
Pregunta 28
Pregunta
Which of the following molecules is a purine type of nitrogenous base?
Respuesta
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2
-
3
-
5
-
12
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13
Pregunta 29
Pregunta
Which of the following molecules act as building blocks (monomers) of polypeptides?
Respuesta
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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
Pregunta 30
Pregunta
Which of the following molecules could be joined together by a peptide bond as a result of a dehydration reaction?
Respuesta
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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
Pregunta 31
Pregunta
A fat (or triacylglycerol) would be formed as a result of a dehydration reaction between
Respuesta
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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.
Pregunta 32
Pregunta
Which of the following molecules could be joined together by a phosphodiester type of covalent bond?
Respuesta
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3 and 4
-
3 and 8
-
6 and 15
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11 and 12
-
11 and 13
Pregunta 33
Pregunta
Which of the following molecules contains a glycosidic linkage type of covalent bond?
Respuesta
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4
-
6
-
12
-
13
-
15
Pregunta 34
Pregunta
Which of the following molecules consists of a hydrophilic "head" region and a hydrophobic "tail" region?
Respuesta
-
2
-
5
-
7
-
9
-
11
Pregunta 35
Respuesta
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1 and 4 could be joined together by a glycosidic linkage to form a disaccharide.
-
9 and 10 could be joined together by ester bonds to form a triacylglycerol.
-
2 and 7 could be joined together to form a short peptide.
-
2, 7, and 8 could be joined together to form a short peptide.
-
14 and 15 could be joined together to form a polypeptide.
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