16737292
Descrição
Quiz por Alison Chase, atualizado more than 1 year ago
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Criado por Alison Chase
aproximadamente 5 anos atrás
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Questão 1
Questão
What are the four types of atoms that make up 96% of all matter found in organisms?
Responda
-
hydrogen, carbon, nitrogen, and oxygen
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hydrogen, carbon, oxygen, and sulfur
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hydrogen, oxygen, nitrogen, and phosphorus
-
hydrogen, oxygen, phosphorus, and sulfur
Questão 2
Questão
What types of molecules have hydrophilic interactions?
Responda
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polar
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non polar
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ionic
-
polar and ionic
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non polar and ionic
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all of the above
Questão 3
Questão
Why is it that diving bell spiders do not drown when on water?
Responda
-
surface tension
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water resists forces that increase it surface area
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cohesion
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surface tension and cohesion
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all of the above
Questão 4
Questão
Which has greater potential energy?
Responda
-
short bonds like that found in a hydroxyl group
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strong bonds
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long bonds like that found between carbon and hydrogen
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weak bonds
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short bonds like that found in a hydroxyl group and strong bonds
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long bonds like that found between carbon and hydrogen and weak bonds
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all of the above
Questão 5
Questão
Organic molecules means...
Responda
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molecules that contain carbon
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octane
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molecules that contain water
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molecules that contain carbon and octane
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all of the above
Questão 6
Questão
How amino acids make up the building blocks of proteins?
Responda
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10
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20
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infinite
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50
Questão 7
Questão
What makes proteins different from one another
Responda
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hydrophilic interactions
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R-groups
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amino group
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carboxyl group
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amino and carboxyl group
Questão 8
Questão
Monomers polymerize through...
Responda
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condensation reactions
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hydrolysis
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dehydration reactions
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condensation and dehydration reactions
Questão 9
Questão
What are the three main components of a peptide-bonded backbone?
Responda
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R-group orientation
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Directionality
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Flexibility
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R-group orientation and flexibility
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all of the above
Questão 10
Questão
What is the secondary structure of proteins?
Responda
-
the unique sequence of amino acids
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combinations of polypeptides
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interactions between residues that are brought together as the chain bends and folds in space
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created by the interactions between functional groups
Questão 11
Questão
Molecular chaperones do the following...
Responda
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denatures proteins
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facilitate protein folding
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recognize unfolded proteins by binding to hydrophobic patches that are not normally exposed
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unfolds proteins
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denatures proteins and unfolds proteins
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facilitate protein folding and recognize unfolded proteins by binding to hydrophobic patches that are not normally exposed
Questão 12
Questão
Which of the following describes enzymes?
Responda
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"lock and key"
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catalyze reactions
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all of the above
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none of the above
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Fischer's model
Questão 13
Questão
Which of the following describes the sugar present in a nucleotide?
Responda
-
4' carbon sugar
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6' carbon sugar
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5' carbon sugar
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none of the above
Questão 14
Questão
Which of the following are pyrimidines?
Responda
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cytosine
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uracil
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adenine
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guanine
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cytosine and uracil
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adenine and cytosine
Questão 15
Questão
Which term describes the bond that polymerizes nucleic acids?
Responda
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glycosidic linkages
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peptide bonds
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phosphodiester bonds
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none of the above
Questão 16
Questão
Which of the following is not true of DNA?
Responda
-
tertiary structure follows the Watson-Crick pairing
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has ribose as its sugar
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has an antiparallel structure
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none of the above
Questão 17
Responda
-
polypeptide
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DNA
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RNA
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steroid
Questão 18
Questão
Which of the following means "many-sugars?"
Responda
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monomers
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monosaccharides
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polysaccharides
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oligosaccharides
Questão 19
Questão
Which of the following is a ketose?
Responda
-
Image:Ketose (binary/octet-stream)
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none of the above
Questão 20
Questão
Which of the following describes the chemical structure of starch?
Responda
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contains alpha-glucose joined by glycosidic linkages
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amylose and amylopectin
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both alpha 1,4 glycosidic linkages and alpha 1,6 glycosidic linkages
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contains alpha-glucose joined by glycosidic linkages and both alpha 1,4 glycosidic linkages and alpha 1,6 glycosidic linkages
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all of the above
Questão 21
Questão
Which of the following describes a glycoprotein?
Responda
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is a protein that is linked to a carbohydrate
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protein that is linked to a oligosaccharides
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spans the glycolipid
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all of the above
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none of the above
Questão 22
Questão
Highly unsaturated lipids are _____ at room temperature
Responda
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solid
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partially solid
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partially liquid
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liquid
Questão 23
Questão
What is the commonality shared between micelles and lipid bilayers?
Responda
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They are both circular in formation
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They are both linear in formation
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Both have hydrophobic tails facing one another
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Both have hydrophobic heads facing one another
Questão 24
Questão
Lipid bilayer with short and unsaturated hydrocarbon tails have...
Responda
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lower permeability
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lower fluidity
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higher permeability
Questão 25
Questão
The following statement describes which: As water leaves, the vesicle shrinks and the membrane shrivels.
Responda
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hypotonic
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hypertonic
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isotonic
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none of the above
Questão 26
Questão
Exergonic reactions have the following qualities...
Responda
-
delta G is less than zero
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delta G is greater than zero
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delta G is equal to zero
Questão 27
Questão
Phosphorylation is when...
Responda
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addition of a phosphate group to a substrate
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removal of a phosphate group to a substrate
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none of the above
Questão 28
Questão
The following characteristics represent an "induced fit":
Responda
-
reorients the substrates and bind them tighter to the active site
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conformational change of the active site
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when substrate and active site collide in precise orientation
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reorients the substrates and bind them tighter to the active site and conformational change of the active site
Questão 29
Questão
Which of the following describes feedback inhibition?
Responda
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when the concentration of a product molecule becomes rare
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when the concentration of the product molecule becomes abundant
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"feeds back" to stop reaction sequence
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"feeds back" to stop product sequence
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when the concentration of the product molecule becomes abundant and "feeds back" to stop reaction sequence
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when the concentration of a product molecule becomes rare and "feeds back" to stop reaction sequence
Questão 30
Questão
Which of the following does not occur during glycolysis?
Responda
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one five-molecule carbon molecule of glucose is broken down
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glucose is broken down into two molecules of three-carbon pyruvate
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NAD+ is reduced to form NADH
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ATP is produced from ADP and Pi
Questão 31
Questão
Which of the following is not true about the citric acid cycle?
Responda
-
each acetyl CoA is oxidized to two molecules of CO2
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each acetyl CoA is reduced to two molecules of CO2
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more ATP and NADH is produced
-
FAD is reduced to form FADH2
Questão 32
Questão
Lactic acid fermentation
Responda
-
regenerates NAD+ by forming lactate
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yeast converts pyruvate to the two-carbon compound acetaldehyde
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both of the above
-
none of the above
Questão 33
Questão
Protein conformation is generally not obtained until the
Responda
-
primary level
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secondary level
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tertiary level
-
quaternary level
Questão 34
Questão
Which of the following hydrocarbons has a double bond in its carbon skeleton?
Responda
-
C3H8
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C2H6
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C2H4
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CH4
Questão 35
Questão
Acids in solution
Responda
-
donate OH ions
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donate H ions
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can remove OH ions
-
donate OH ions and can remove OH ions
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donate H ions and can remove OH ions
Questão 36
Questão
The fact that lipids are high in potential energy is due to the
Responda
-
multiple carbon to hydrogen bonds
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solubility of each glycerol molecule
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the number of oxygen to hydrogen bonds
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the number of oxygen to carbon bonds
Questão 37
Questão
The amino group can functionally
Responda
-
act as an acid
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cause solutions to gain a sour taste
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act as a base
-
none of the above apply
Questão 38
Questão
The chemical behavior of amino acids is primarily due to
Responda
-
the nature of the N terminis
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the nature of the C terminis
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the R group
-
none of the above
Questão 39
Questão
A triple bond between two atoms would involve the sharing of
Responda
-
2 electrons
-
3 electrons
-
8 electrons
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6 electrons
Questão 40
Questão
The monomers that construct primary proteins are
Responda
-
simple sugars
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lipids
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amino acids
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polypeptides
Questão 41
Questão
The atomic number of an atom is 12. The number of valence electrons is
Responda
-
4
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3
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2
-
none of the above
Questão 42
Questão
Tertiary structures are more rigid than secondary protein structures because
Responda
-
the number and type of possible chemical bonds increases
-
the bond length in hydrogen bonds increases
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the bond length in hydrogen bonds decreases
-
the number and type of possible chemical bonds increases and the bond length in hydrogen bonds decreases
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none of the above would apply
Questão 43
Questão
Most complex carbohydrates are constructed from
Responda
-
amino acids
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lipids
-
monosaccharides
-
glycogen
Questão 44
Questão
Enzymes can regulate/influence the amount of energy required for a chemical reaction to proceed
Responda
-
by lowering the activation energy
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decreasing the randomness of molecular formation
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increasing the randomness of molecular formation
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by lowering the activation energy and decreasing the randomness of molecular formation
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by lowering the activation energy and increasing the randomness of molecular formation
Questão 45
Questão
weak acids typically dissociate
Responda
-
partially
-
completely
-
not at all
Questão 46
Questão
glycogen is a
Responda
-
monosaccharides stored in animals
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monosaccharides stored in plants
-
polysaccharides stored in animals
-
polysaccharides stored in plants
Questão 47
Questão
the hydrophobic end of a protein would
Responda
-
readily not dissolve in water
-
readily dissolve in water
-
make the solution acidic
-
none of the above is true
Questão 48
Questão
if the concentration of H+ ions and OH- ions in solution is equal, then the pH will be
Responda
-
acidic
-
neutral
-
basic
-
strongly acidic
-
strongly basic
Questão 49
Questão
The 5' --> 3' linear directionality of a DNA polymer is established
Responda
-
when the 5' carbon and its phosphate group of a proceeding nucleotide attaches to the 3' carbon of the preceding nucleotide.
-
only in the anti-parallel strand of DNA
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when the nitrogenous bases form hydrogen bonds
-
none of the above are correct
Questão 50
Questão
a pyruvate molecule contains
Responda
-
1 carbon atom
-
3 carbon atoms
-
6 carbon atoms
-
2 carbon atoms
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