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# Tutor profile: Oliver L.

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Oliver L.
Senior Biomedical Engineering Student
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## Questions

### Subject:Basic Math

TutorMe
Question:

If Bonny has \$\$ 4 \$\$ different shirts, how many unique sets of \$\$ 2 \$\$ shirts can she choose?

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Oliver L.

This kind of question can be done by simply list out all the possible combinations: Say we label the \$\$ 4 \$\$ shirts \$\$ A, B, C, D \$\$, we can list all the unique pairs: \$\$ AB, AC, AD, BC, BD, CD = 6\$\$ pairs

### Subject:Biochemistry

TutorMe
Question:

How many ATP molecules are produced through the oxidation of \$\$ 1 \$\$ molecule of glucose?

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Oliver L.

It takes approximately \$\$ 4 \$\$ protons to generate \$\$ 1 \$\$ ATP molecule. Each \$\$ NADH \$\$ molecule pumps \$\$ 10 \$\$ protons across the mitochondrial membrane. Each \$\$ FADH_2 \$\$ molecule pumps \$\$ 6 \$\$ protons across the mitochondrial membrane. We can calculate the total number of ATP molecules produced by each electron carrier to be: \$\$ NADH = 10/4 = 2.5 \$\$ ATP \$\$ FADH_2 = 6/4 = 1.5 \$\$ ATP Now we can sum the total ATP produced for each phase of cellular respiration: Glycolysis: \$\$ 2 \$\$ ATP \$\$ 2 \$\$ \$\$ NADH = 2*2.5 = 5\$\$ ATP Pyruvate Oxidation: \$\$ 2 \$\$ \$\$ NADH = 2*2.5 = 5\$\$ ATP Krebs/TCA Cycle: \$\$ 2 \$\$ ATP \$\$ 6 \$\$ \$\$ NADH = 6*2.5 = 15\$\$ ATP \$\$ 2 \$\$ \$\$ FADH_2 = 2*1.5 = 3\$\$ ATP Adding together the ATP molecules produced at each phase yields of total of \$\$ 32 \$\$ ATP!

### Subject:Algebra

TutorMe
Question:

Solve for the roots of \$\$ x^2+5x+7 = 1 \$\$

Inactive
Oliver L.

Subtract \$\$ 1 \$\$ from both sides to set the equation equal to \$\$ 0 \$\$... \$\$ x^2+5x+6 \$\$ At this point the roots can be found by graphing, factoring, or the quadratic formula. Since this equation is factorable, we can find the roots without a calculator... \$\$ (x+2)(x+3) = 0 \$\$ Hence, the roots are \$\$ -2, -3 \$\$.

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