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AAMC 3 Bio/bio Exam Questions and Answers

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AAMC 3 Bio/bio Exam Questions and Answers Individual M has longer limbs and muscles than Individual N. Both individuals lift the same amount of weight from the ground to their shoulders an equal number of times. If all repetitions were completed in synchrony, which statement about the amount of...

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  • October 28, 2024
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  • 2024/2025
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AAMC 3 Bio/bio Exam Questions and

Answers


Individual M has longer limbs and muscles than Individual N. Both individuals lift the same amount of

weight from the ground to their shoulders an equal number of times. If all repetitions were completed in

synchrony, which statement about the amount of work completed by the individuals is true? At the end

of the workout: - ANSWER✔✔-Individual N will have done less work because the object was moved a

shorter distance.


- W= Fd


- N has shorter limbs so they will perform less work


- easy


What are the relative potentials for force and power generation by a slow-twitch muscle fiber and a fast-

twitch muscle fiber of the same diameter? - ANSWER✔✔-The fast-twitch fiber is capable of generating

more power than the slow-twitch fiber, while the potential for force generation is the same.


- similarly sized fibers would generate similar force, regardless of fiber type


- easy


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Which of the following is LEAST likely to occur in a muscle fiber that is metabolizing anaerobically? -

ANSWER✔✔-Phosphorylation of ADP within the electron transport chain


- lack of oxygen shuts down TCA and ETC~ easy


Assuming the duration of contraction is the same, which point on the power curve corresponds to the

LEAST amount of work being done by the muscle? - ANSWER✔✔-point A


- work is the product of force applied over a distance an object is moved (or in this case, a muscle

contracts).


- read graph. Force and Velocity (distance) should be smallest in order for work to be the least


According to the passage, relative to slow-twitch fibers, fast-twitch fibers are likely to exhibit which

property? - ANSWER✔✔-- greater Ca2+ pumping capacity.


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.


Based on the information in the passage, what is the most likely mechanism of inheritance for HPRCC? -

ANSWER✔✔-autosomal dominant




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- must be inherited in a autosomal dominant pattern in order for individuals II-1 and II-2 to produce both

affected and unaffected offspring.


Based on these results, the MET mutation is what type of mutation? - ANSWER✔✔-pyrimidine to

pyrimidine


- shows it goes from T to C


- easy


What is the structure of the amino acid residue that is replaced at position 1112 as a result of the MET

mutation? - ANSWER✔✔-MET mutation causes a histidine residue to be replaced with an arginine

residue at position 1112.


Which amino acid residue is involved in the bond that joins the α and β subunits of HGF? - ANSWER✔✔-

C


- it says in the passage that the subunits are joined by a disulfide bond


- easy


which of the following animal pairs best illustrates the outcome of convergent evolution? - ANSWER✔✔-

dolphin and shark


- convergent evolution is defined as a process whereby distantly related organisms independently evolve

similar traits to adapt to similar needs.

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