AAMC FL #3 Bio/Biochem || A+ Graded Already.
Power equation= correct answers P=fv
f=force
v=velocity
Which of the following is LEAST likely to occur in a muscle fiber that is metabolizing
anaerobically?
A.Fermentation of glucose to lactic acid
B.Phosphorylation of ADP within the electron transport chain
C.Depletion of stores of glycogen
D.Acidification of the cytoplasm correct answers B
fast-twitch muscle correct answers Muscle fibers that contract rapidly and powerfully, with little
endurance. They have few mitochondria and large glycogen reserves. They depend on anaerobic
pathways to generate ATP during muscle contraction
slow-twitch muscle correct answers type I skeletal muscle - aerobically burns fats using
mitochondria efficiently for endurance activities
According to the passage, relative to slow-twitch fibers, fast-twitch fibers are likely to exhibit
which property?
A.Greater Ca2+-pumping capacity
B.Increased capillary density
C.More mitochondria
D.Higher levels of oxygen-binding proteins correct answers A
he answer to this question is A because according to the passage, slow-twitch fibers are adapted
for aerobic exercise which suggests they are likely, relative to fast-twitch fibers, to have
increased capillary density, larger numbers of mitochondria, and higher levels of oxygen-binding
proteins. The names of the fibers themselves give insight into their relative rates of contraction.
Thus, it is unlikely that slow-twitch fibers will have greater Ca2+-pumping capacity, than fast-
twitch fibers.
a greater Ca2+ pump activity means you can get one muscle to contract faster (hence it is called
fast-twitch).
Ca2+ pump correct answers - When the pump is bound with ATP, two calcium ions from the
cytosol bind to the Ca2+ binding cavity.
- pump phosphorylation causes a conformational change in the pump that pushes the Ca2+ into
the sarcoplasmic reticulum for storage
PUR As Gold (2) correct answers Purines are Adenine and Guanine
, CUT the PY correct answers Cytosine, Uracile, Thymine
Pyrimidines
arginine correct answers Arg, R
aspartate correct answers Asp, D
glutamate correct answers Glu, E
excitatory neurotransmitter
asparagine correct answers Asn, N, polar
glutamine correct answers Gln, Q
alanine correct answers Ala, A
glycine correct answers Gly, G
α subunit and a β subunit joined by a disulfide bond.
Which amino acid residue is involved in the bond that joins the α and β subunits of HGF?
A.A
B.C
C.S
D.Y correct answers B
what amino acid is involved in disulfide bonding? correct answers cysteine
tertiary structure bonding correct answers Held together by ionic, hydrogen and disulfide bonds.
Also hydrophobic and hydrophilic interactions
quaternary structure correct answers The fourth level of protein structure; the shape resulting
from the association of two or more polypeptide subunits.
ionic, hydrogen and disulfide bonds. Also hydrophobic and hydrophilic interactions
secondary structure bond correct answers hydrogen bond
primary structure bond correct answers peptide bond
types of evolution correct answers divergent, convergent, parallel
Power equation= correct answers P=fv
f=force
v=velocity
Which of the following is LEAST likely to occur in a muscle fiber that is metabolizing
anaerobically?
A.Fermentation of glucose to lactic acid
B.Phosphorylation of ADP within the electron transport chain
C.Depletion of stores of glycogen
D.Acidification of the cytoplasm correct answers B
fast-twitch muscle correct answers Muscle fibers that contract rapidly and powerfully, with little
endurance. They have few mitochondria and large glycogen reserves. They depend on anaerobic
pathways to generate ATP during muscle contraction
slow-twitch muscle correct answers type I skeletal muscle - aerobically burns fats using
mitochondria efficiently for endurance activities
According to the passage, relative to slow-twitch fibers, fast-twitch fibers are likely to exhibit
which property?
A.Greater Ca2+-pumping capacity
B.Increased capillary density
C.More mitochondria
D.Higher levels of oxygen-binding proteins correct answers A
he answer to this question is A because according to the passage, slow-twitch fibers are adapted
for aerobic exercise which suggests they are likely, relative to fast-twitch fibers, to have
increased capillary density, larger numbers of mitochondria, and higher levels of oxygen-binding
proteins. The names of the fibers themselves give insight into their relative rates of contraction.
Thus, it is unlikely that slow-twitch fibers will have greater Ca2+-pumping capacity, than fast-
twitch fibers.
a greater Ca2+ pump activity means you can get one muscle to contract faster (hence it is called
fast-twitch).
Ca2+ pump correct answers - When the pump is bound with ATP, two calcium ions from the
cytosol bind to the Ca2+ binding cavity.
- pump phosphorylation causes a conformational change in the pump that pushes the Ca2+ into
the sarcoplasmic reticulum for storage
PUR As Gold (2) correct answers Purines are Adenine and Guanine
, CUT the PY correct answers Cytosine, Uracile, Thymine
Pyrimidines
arginine correct answers Arg, R
aspartate correct answers Asp, D
glutamate correct answers Glu, E
excitatory neurotransmitter
asparagine correct answers Asn, N, polar
glutamine correct answers Gln, Q
alanine correct answers Ala, A
glycine correct answers Gly, G
α subunit and a β subunit joined by a disulfide bond.
Which amino acid residue is involved in the bond that joins the α and β subunits of HGF?
A.A
B.C
C.S
D.Y correct answers B
what amino acid is involved in disulfide bonding? correct answers cysteine
tertiary structure bonding correct answers Held together by ionic, hydrogen and disulfide bonds.
Also hydrophobic and hydrophilic interactions
quaternary structure correct answers The fourth level of protein structure; the shape resulting
from the association of two or more polypeptide subunits.
ionic, hydrogen and disulfide bonds. Also hydrophobic and hydrophilic interactions
secondary structure bond correct answers hydrogen bond
primary structure bond correct answers peptide bond
types of evolution correct answers divergent, convergent, parallel
