in prokaryotes DNA is arranged as

a loop of DNA without histones in the cytoplasm

different amino acids have different R groups, thus they have

different solubilities in the same solvent

isoelectric point is the

pH where overall charge is zero

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BOCB2616 EXAM PREP

94 termsStudBud Administration107 plays

Imported from external platform

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Questions 94

Answers

1
with gel filtration chromatography, separation of proteins are based on
shape
size and shape
size
solubility
2
a buffer will break if you add more acid than available conj. base
True
False
3
hydrophillic amino acid replaced by hydrophobic amino acid, which will be affected
primary and tertiary
primary
secondary and tertiary
secondary
4
zwitterions exist at the
isoelectric point
isosonic point
isotonic point
isometric point
5
earliest cells on earth were
viruses
eukaryotes
plant cells
prokaryotes
6
why does ice float
liquid water is less dense
the water molecules are solid and less dense
solid water is more cohesive, than liquid water
liquid water is less cohesive, than solid water
7
amino acids react via a ______ reaction and releases _____
condensation, H20
covalent bonds, NH2
elimination, HCl
hydrolysis, Cl2
8
which water property controls temperature fluctuations in the body
versatile solvent
high heat capacity
surface tension
lower density
9
name the bonds between bases on opposite strands of DNA molecules
phosphate bonds
ionic bonds
hydrogen bonds
phosphodiester bonds
10
a solute is something like water, whereas solvents are like sugars and salts
True
False
11
a buffer consists of
conjugate base
H+
all of the above
weak acid
12
regarding the peptide GLY-PHE-ASP-GLN, in one letter codes it is
GFDN
GFEQ
GFEN
GFDQ
13
amino acid rarely found in secondary structures
P
V
R
H
14
the negative of the common log of the H+ concentration is known as pH
False
True
15
chromatography method based on charge
hydrophobic interaction
affinity
ion exchange
size exclusion
16
miller and urey used water, gas mixtures and _______ to recreate early condotions on earth
sound waves
music
explosives
electricity
17
in a water molecule, oxygen is attached to hydrogen by a
hydrogen bond
magical bond
covalent bond
james bond
18
regarding the peptide GLY-PHE-ASP-GLN, the net charge at pH 1
-2
0
-1
+1
19
a dipole is when
covalent bonding doesn't work
opposite ends of a molecule or bond are partially charged
electrons are shared equally
attraction between positive and negative ions
20
pH=4
basic
acidic
21
used to determine 3D structure of proteins
X-ray crystallography
CNMR
HNMR
all of the above
22
regarding the peptide GLY-PHE-ASP-GLN, the net charge at pH 14
-2
0
-1
+1
23
amino acid typically found on the inside of proteins
E
V
D
Y
24
regarding the peptide GLY-PHE-ASP-GLN, which is an aromatic amino acid
phenylalanine
tyrosine
tryptophan
valine
25
pH+pOH=
7
14
0
26
amino acids can form optical isomers
True
False
27
buffer capacity IS
the ability of the buffer to resist change in pH
pH at which buffer works best
concentration of components in buffer
28
pH of a buffer solution will not change at all if
you add an acid
there is always a small change
you add a base
you add water
29
linkage between peptides
CHNO
CONH
COOH
COO
30
ground up cells are known as
homogenate
slurry
fraction
cellulate
31
in isoelectric focusing, proteins migrate towards their isoelectric
group
current
charge
pH
32
regarding the peptide GLY-PHE-ASP-GLN, at which pH will half the molecules have a net charge of -1
6.80
3.16
4.00
2.32
33
water expands upon freezing, and as a result density ______ and volume ______
increases and increases
increases and decreases
decreases and increases
decreases and decreases
34
in prokaryotes DNA is arranged as
a loop of DNA in the nucleus
a loop of DNA without histones in the cytoplasm
a loop of DNA with histones in the nucleus
a loop of DNA with histones
35
different amino acids have different R groups, thus they have
different solubilities in the same solvent
same solubilities in the same solvent
36
amino acid can be described as bifunctional because they have two different functional groups
True
False
37
the pH scale ranges from
0 - 7
0 - 14
0 - 1
-1 - 1
38
an acidosis can occur when the concentration of CO2 in our blood raises above normal
True
False
39
chain of amino acids is known as
polystyrene
protein
polypeptide
peptide
40
amino acid typically found on the outside of proteins
L
S
A
V
41
ice is heavier than water
True
False
42
isoelectric point is the
pH where overall charge is negative
pH where overall charge is positive
pH where overall charge is zero
43
which base does cytosine pair with
guanosine
thymine
guanine
adenine
44
when exposed to heat, which level of structure will be least affected
primary
secondary
tertiary
quaternary
45
amino acid residues per turn in alpha-helix
10.5
3.6
4.5
6.2
46
CH3COOH is
buffer
all of the above
weak acid
acetic acid
47
the earliest life forms were probably
plants
dinosaurs
cavemen
unicellular
48
regarding the peptide GLY-PHE-ASP-GLN, at which pH will all of the molecules have a net charge of -1
6.80
4.00
2.32
3.16
49
which property of water allows dissolving of many substances
polarity
cohesion
adhesion
hydrogen bonding
50
between water molecules, oxygen is attached to a hydrogen by
hydrogen bonds
magical bonds
james bond
covalent bonds
51
a base will accept
H20
OH-
Cl-
H+
52
protein purification is based on all the following, except
charge
solubility
hydrophobicity
viscosity
53
a nucleotide is made up of the following
hexose, phosphate and nitrogen base
pentose, phosphate and nitrogen base
hexose, phosphate and nitrogenous base
pentose, phosphate and nitrogenous acid
54
sequence of amino acids held together by peptide bond
tertiary structure
secondary structure
quaternary structure
primary structure
55
in a water molecule which atom has the partial negative charge
H
O
56
which chemical units were discovered in the miller-urey experiment
methane
oxygen
amino acids
sugar
57
a buffer stops pH change completely
True
False
58
in polar bonds
electrons are shared unequally
electrons are shared equally
59
regarding the peptide GLY-PHE-ASP-GLN, which amino acid is polar uncharged
aspartic acid
asparagine
glutamine
glutamic acid
60
not a typical denaturtion method for proteins
Urea or Guanidinium Chloride
glycerol
chaotropic agents
change in pH or temperature
61
hydrogen bonds form stronger chemical bonds than ionic bonds
False
True
62
what effect does SDS have on proteins
break all bonds
denature protein
partially denature protein and coat in negative charge
coat protein in negative charge
63
regarding the peptide GLY-PHE-ASP-GLN, the isoelectric point is
2.32
6.80
4.00
3.16
64
water solution is neutral when
it contains no H+
it contains no ionizable water molecules
it contains no H+ or OH-
the concentration of H+ and OH- are equal
65
in a water molecule which atom has the partial positive charge
O
H
66
how old is the earth believed to be
2021
4.6 million
4.6 billion
3.5 billion
67
parallel beta sheets have _____ and antiparallel have _____ hydrogen bonds
bent, straight
straight, bent
bent, bent
straight, straight
68
in SDS-PAGE electric current has to be applied for protein migration
False
True
69
differential centrifugation 1st pellet contains
membrane proteins
cytoplasmic proteins
mitochondrial fraction
nuclear fraction
70
alpha-helices or beta-pleated sheets created by hydrogen bonding
secondary structure
primary structure
quaternary structure
tertiary structure
71
zwitterion
dipolar ion with both positive and negative charges
non-polar molecule with no charges
dipolar molecule with no charges
non-polar ion with both positive and negative charges
72
electronegativity is
the number of valnce electrons an atom has
an atoms ability to attract electrons
Pikachu casts thunderbolt
atoms want 8 electrons in valence shells
73
what did the miller-urey experiment demonstrate
that simple molecules did not occur on early earth
life could have been created on early earth with the atmosphere present
how rna was the first organic molecule
74
miller and urey designed an experiment that
created the first bacterium
recreated the early conditions of earth
grew maggots from meat
made fossils
75
proteins are negatively charged with SDS prior to gel electrophoresis
True
False
76
which property of water molecules make it possible for hydrogen bonds to occur
high heat capacity
polarity
covalent bonding
presence of 10 electrons
77
with SDS-PAGE larger proteins move faster
False
True
78
proteins which assist in protein folding and induce misfolded proteins to refold
chaperones
chaotropic agents
molten globule
collagen
79
earth's early atmosphere did not contain
water vapor
methane
nitrogen
oxygen
80
which theory describes how eukaryotic cells evolved from prokaryotic cells
big bang theory
endosymbiotic theory
theory of relativity
evolutionary theory
81
distance per turn of alpha-helix
0.54
0.63
0.34
0.28
82
regarding the peptide GLY-PHE-ASP-GLN, the net charge at pH 7
0
+1
-1
-2
83
hydrolysis of polypeptides result in
hydrogen bond breaks
covalent bond breaks
peptide bond breaks
phosphodiester bond breaks
84
interactions responsible for tertiary structure
all of the above
hydrogen bonding
ionic charges
hydrophobic interactions
85
pH=9
basic
acidic
86
most electronegative atom
F
H
Na
Cl
87
buffer range is
pH range in which buffer works best
ability of buffer to resist change
concentration of weak acid and conj. base
concentration of buffer components
88
water is known as the
universal solute
universal solution
universal solvent
universal dilution
89
hydrogen bonds form quicker and remain intact longer in which temperature
warm
cold
neutral
90
regarding the peptide GLY-PHE-ASP-GLN, the basic amino acid is
asparagine
phenylalanine
glutamine
there is no basic amino acid
91
as H+ concentration increases, a solution will become acidic and pH increases
False
True
92
in a covalent bond, electrons are
free-moving
transferred
negative
shared
93
interaction between R-groups and determines overall 3D shape
quaternary structure
tertiary structure
primary structure
secondary structure
94
which statement best describes DNA structure
a double helicof antiparallel strands
a double helix of parallel strands
a helix of parallel strands
a helix of antiparallel strands

BOCB2616 EXAM PREP Flashcards | StudBud

BOCB2616 EXAM PREP

94 termsStudBud Administration107 plays

Imported from external platform

Flashcards94 cardsFPractice quizPHost liveL

Questions 94

Answers

1
with gel filtration chromatography, separation of proteins are based on
shape
size and shape
size
solubility
2
a buffer will break if you add more acid than available conj. base
True
False
3
hydrophillic amino acid replaced by hydrophobic amino acid, which will be affected
primary and tertiary
primary
secondary and tertiary
secondary
4
zwitterions exist at the
isoelectric point
isosonic point
isotonic point
isometric point
5
earliest cells on earth were
viruses
eukaryotes
plant cells
prokaryotes
6
why does ice float
liquid water is less dense
the water molecules are solid and less dense
solid water is more cohesive, than liquid water
liquid water is less cohesive, than solid water
7
amino acids react via a ______ reaction and releases _____
condensation, H20
covalent bonds, NH2
elimination, HCl
hydrolysis, Cl2
8
which water property controls temperature fluctuations in the body
versatile solvent
high heat capacity
surface tension
lower density
9
name the bonds between bases on opposite strands of DNA molecules
phosphate bonds
ionic bonds
hydrogen bonds
phosphodiester bonds
10
a solute is something like water, whereas solvents are like sugars and salts
True
False
11
a buffer consists of
conjugate base
H+
all of the above
weak acid
12
regarding the peptide GLY-PHE-ASP-GLN, in one letter codes it is
GFDN
GFEQ
GFEN
GFDQ
13
amino acid rarely found in secondary structures
P
V
R
H
14
the negative of the common log of the H+ concentration is known as pH
False
True
15
chromatography method based on charge
hydrophobic interaction
affinity
ion exchange
size exclusion
16
miller and urey used water, gas mixtures and _______ to recreate early condotions on earth
sound waves
music
explosives
electricity
17
in a water molecule, oxygen is attached to hydrogen by a
hydrogen bond
magical bond
covalent bond
james bond
18
regarding the peptide GLY-PHE-ASP-GLN, the net charge at pH 1
-2
0
-1
+1
19
a dipole is when
covalent bonding doesn't work
opposite ends of a molecule or bond are partially charged
electrons are shared equally
attraction between positive and negative ions
20
pH=4
basic
acidic
21
used to determine 3D structure of proteins
X-ray crystallography
CNMR
HNMR
all of the above
22
regarding the peptide GLY-PHE-ASP-GLN, the net charge at pH 14
-2
0
-1
+1
23
amino acid typically found on the inside of proteins
E
V
D
Y
24
regarding the peptide GLY-PHE-ASP-GLN, which is an aromatic amino acid
phenylalanine
tyrosine
tryptophan
valine
25
pH+pOH=
7
14
0
26
amino acids can form optical isomers
True
False
27
buffer capacity IS
the ability of the buffer to resist change in pH
pH at which buffer works best
concentration of components in buffer
28
pH of a buffer solution will not change at all if
you add an acid
there is always a small change
you add a base
you add water
29
linkage between peptides
CHNO
CONH
COOH
COO
30
ground up cells are known as
homogenate
slurry
fraction
cellulate
31
in isoelectric focusing, proteins migrate towards their isoelectric
group
current
charge
pH
32
regarding the peptide GLY-PHE-ASP-GLN, at which pH will half the molecules have a net charge of -1
6.80
3.16
4.00
2.32
33
water expands upon freezing, and as a result density ______ and volume ______
increases and increases
increases and decreases
decreases and increases
decreases and decreases
34
in prokaryotes DNA is arranged as
a loop of DNA in the nucleus
a loop of DNA without histones in the cytoplasm
a loop of DNA with histones in the nucleus
a loop of DNA with histones
35
different amino acids have different R groups, thus they have
different solubilities in the same solvent
same solubilities in the same solvent
36
amino acid can be described as bifunctional because they have two different functional groups
True
False
37
the pH scale ranges from
0 - 7
0 - 14
0 - 1
-1 - 1
38
an acidosis can occur when the concentration of CO2 in our blood raises above normal
True
False
39
chain of amino acids is known as
polystyrene
protein
polypeptide
peptide
40
amino acid typically found on the outside of proteins
L
S
A
V
41
ice is heavier than water
True
False
42
isoelectric point is the
pH where overall charge is negative
pH where overall charge is positive
pH where overall charge is zero
43
which base does cytosine pair with
guanosine
thymine
guanine
adenine
44
when exposed to heat, which level of structure will be least affected
primary
secondary
tertiary
quaternary
45
amino acid residues per turn in alpha-helix
10.5
3.6
4.5
6.2
46
CH3COOH is
buffer
all of the above
weak acid
acetic acid
47
the earliest life forms were probably
plants
dinosaurs
cavemen
unicellular
48
regarding the peptide GLY-PHE-ASP-GLN, at which pH will all of the molecules have a net charge of -1
6.80
4.00
2.32
3.16
49
which property of water allows dissolving of many substances
polarity
cohesion
adhesion
hydrogen bonding
50
between water molecules, oxygen is attached to a hydrogen by
hydrogen bonds
magical bonds
james bond
covalent bonds
51
a base will accept
H20
OH-
Cl-
H+
52
protein purification is based on all the following, except
charge
solubility
hydrophobicity
viscosity
53
a nucleotide is made up of the following
hexose, phosphate and nitrogen base
pentose, phosphate and nitrogen base
hexose, phosphate and nitrogenous base
pentose, phosphate and nitrogenous acid
54
sequence of amino acids held together by peptide bond
tertiary structure
secondary structure
quaternary structure
primary structure
55
in a water molecule which atom has the partial negative charge
H
O
56
which chemical units were discovered in the miller-urey experiment
methane
oxygen
amino acids
sugar
57
a buffer stops pH change completely
True
False
58
in polar bonds
electrons are shared unequally
electrons are shared equally
59
regarding the peptide GLY-PHE-ASP-GLN, which amino acid is polar uncharged
aspartic acid
asparagine
glutamine
glutamic acid
60
not a typical denaturtion method for proteins
Urea or Guanidinium Chloride
glycerol
chaotropic agents
change in pH or temperature
61
hydrogen bonds form stronger chemical bonds than ionic bonds
False
True
62
what effect does SDS have on proteins
break all bonds
denature protein
partially denature protein and coat in negative charge
coat protein in negative charge
63
regarding the peptide GLY-PHE-ASP-GLN, the isoelectric point is
2.32
6.80
4.00
3.16
64
water solution is neutral when
it contains no H+
it contains no ionizable water molecules
it contains no H+ or OH-
the concentration of H+ and OH- are equal
65
in a water molecule which atom has the partial positive charge
O
H
66
how old is the earth believed to be
2021
4.6 million
4.6 billion
3.5 billion
67
parallel beta sheets have _____ and antiparallel have _____ hydrogen bonds
bent, straight
straight, bent
bent, bent
straight, straight
68
in SDS-PAGE electric current has to be applied for protein migration
False
True
69
differential centrifugation 1st pellet contains
membrane proteins
cytoplasmic proteins
mitochondrial fraction
nuclear fraction
70
alpha-helices or beta-pleated sheets created by hydrogen bonding
secondary structure
primary structure
quaternary structure
tertiary structure
71
zwitterion
dipolar ion with both positive and negative charges
non-polar molecule with no charges
dipolar molecule with no charges
non-polar ion with both positive and negative charges
72
electronegativity is
the number of valnce electrons an atom has
an atoms ability to attract electrons
Pikachu casts thunderbolt
atoms want 8 electrons in valence shells
73
what did the miller-urey experiment demonstrate
that simple molecules did not occur on early earth
life could have been created on early earth with the atmosphere present
how rna was the first organic molecule
74
miller and urey designed an experiment that
created the first bacterium
recreated the early conditions of earth
grew maggots from meat
made fossils
75
proteins are negatively charged with SDS prior to gel electrophoresis
True
False
76
which property of water molecules make it possible for hydrogen bonds to occur
high heat capacity
polarity
covalent bonding
presence of 10 electrons
77
with SDS-PAGE larger proteins move faster
False
True
78
proteins which assist in protein folding and induce misfolded proteins to refold
chaperones
chaotropic agents
molten globule
collagen
79
earth's early atmosphere did not contain
water vapor
methane
nitrogen
oxygen
80
which theory describes how eukaryotic cells evolved from prokaryotic cells
big bang theory
endosymbiotic theory
theory of relativity
evolutionary theory
81
distance per turn of alpha-helix
0.54
0.63
0.34
0.28
82
regarding the peptide GLY-PHE-ASP-GLN, the net charge at pH 7
0
+1
-1
-2
83
hydrolysis of polypeptides result in
hydrogen bond breaks
covalent bond breaks
peptide bond breaks
phosphodiester bond breaks
84
interactions responsible for tertiary structure
all of the above
hydrogen bonding
ionic charges
hydrophobic interactions
85
pH=9
basic
acidic
86
most electronegative atom
F
H
Na
Cl
87
buffer range is
pH range in which buffer works best
ability of buffer to resist change
concentration of weak acid and conj. base
concentration of buffer components
88
water is known as the
universal solute
universal solution
universal solvent
universal dilution
89
hydrogen bonds form quicker and remain intact longer in which temperature
warm
cold
neutral
90
regarding the peptide GLY-PHE-ASP-GLN, the basic amino acid is
asparagine
phenylalanine
glutamine
there is no basic amino acid
91
as H+ concentration increases, a solution will become acidic and pH increases
False
True
92
in a covalent bond, electrons are
free-moving
transferred
negative
shared
93
interaction between R-groups and determines overall 3D shape
quaternary structure
tertiary structure
primary structure
secondary structure
94
which statement best describes DNA structure
a double helicof antiparallel strands
a double helix of parallel strands
a helix of parallel strands
a helix of antiparallel strands