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Tutor profile: Minhi K.

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Minhi K.
Tutor, Researcher, Medical Student
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Questions

Subject: Biochemistry

TutorMe
Question:

How do reversible competitive inhibitors effect $$ V_{max} $$ and $$ K_{m} $$ and affinity of an enzyme X with substrate Y?

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Minhi K.
Answer:

Reversible competitive: $$ V_{max} $$ is unchanged. The number of enzymes X available to react with substrate Y does not change. $$ K_{m} $$ is increased (affinity of enzyme X for its substrate is decreased). Substrate Y and the inhibitor are competing for the same spot on the enzyme X. Since enzyme X now has two options to bind to, its affinity to substrate Y decreases. $$ K_{m} $$ is the inverse (opposite) of affinity. Since the affinity is decreased, the $$ K_{m} $$ is increased.

Subject: Biology

TutorMe
Question:

What are the products of the TCA/Krebs cycle from 1 acetyl-CoA?

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Minhi K.
Answer:

$$ 3 NADH, FADH_{2}, GTP, 2 CO_{2} $$

Subject: Anatomy

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Question:

A patient presents to the hospital with a stab in his chest. What structure of the heart is most at risk of being injured?

Inactive
Minhi K.
Answer:

Right ventricle. The heart sits in the chest cavity rotated so that the most anterior structure (the structure closest to the chest wall) is the right ventricle.

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