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AAMC FL #3 Bio/Biochem questions and answers graded A+ 2024/2025
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AAMC FL #3 Bio/Biochem questions and answers graded A+ 2024/2025
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AAMC FL #3 Bio/BiochemPower equation= - ANSP=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 delivery chain
C.Depletion of shops of glycogen
D.Acidification of the cytoplasm - ANSB
fast-twitch muscle - ANSMuscle fibers that agreement unexpectedly and powerfully, with little
staying power. They have few mitochondria and big glycogen reserves. They rely upon
anaerobic pathways to generate ATP at some point of muscle contraction
sluggish-twitch muscle - ANStype I skeletal muscle - aerobically burns fat using mitochondria
correctly for endurance sports
According to the passage, relative to slow-twitch fibers, fast-twitch fibers are likely to exhibit
which belongings?
A.Greater Ca2+-pumping capacity
B.Increased capillary density
C.More mitochondria
D.Higher degrees of oxygen-binding proteins - ANSA
he answer to this question is A due to the fact in keeping with the passage, sluggish-twitch
fibers are tailored for cardio exercise which suggests they are probably, relative to rapid-twitch
fibers, to have expanded capillary density, large numbers of mitochondria, and better levels of
oxygen-binding proteins. The names of the fibers themselves give insight into their relative fees
of contraction. Thus, it is not going that slow-twitch fibers will have greater Ca2+-pumping
potential, than speedy-twitch fibers.
A extra Ca2+ pump hobby way you could get one muscle to agreement faster (consequently it is
called fast-twitch).
Ca2+ pump - ANS- When the pump is bound with ATP, two calcium ions from the cytosol bind to
the Ca2+ binding hollow space.
, - pump phosphorylation reasons a conformational change in the pump that pushes the Ca2+
into the sarcoplasmic reticulum for garage
PUR As Gold (2) - ANSPurines are Adenine and Guanine
CUT the PY - ANSCytosine, Uracile, Thymine
Pyrimidines
arginine - ANSArg, R
aspartate - ANSAsp, D
glutamate - ANSGlu, E
excitatory neurotransmitter
asparagine - ANSAsn, N, polar
glutamine - ANSGln, Q
alanine - ANSAla, A
glycine - ANSGly, 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 - ANSB
what amino acid is worried in disulfide bonding? - ANScysteine
tertiary shape bonding - ANSHeld collectively by way of ionic, hydrogen and disulfide bonds.
Also hydrophobic and hydrophilic interactions
quaternary structure - ANSThe fourth level of protein shape; the shape because of the affiliation
of or more polypeptide subunits.
Ionic, hydrogen and disulfide bonds. Also hydrophobic and hydrophilic interactions
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