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# Tutor profile: Janie D.

Janie D.
Academic Tutor at the University of Utah

## Questions

### Subject:Biology

TutorMe
Question:

If a molecule X is being moved outside the cell using ATP, is the concentration of molecule X higher on the inside or outside of the cell?

Janie D.

Because active transport (the usage of ATP) must be used to move the molecule outside of the cell, it is likely that this action goes against the concentration gradient. The concentration gradient usually has molecules go from higher concentration to lower concentration, so if it must use energy to push molecule X out of the cell, it is likely moving molecule X from a low concentration to a high concentration (going against the concentration gradient). Thus, the concentration of molecule X is higher on the outside of the cell.

### Subject:Calculus

TutorMe
Question:

Consider this. Say that you are traveling with a velocity V(t)= t mph. You know that your position at time 0 was 5 miles from your house. How far were you from your house at time 2?

Janie D.

Position= S(t). This is an antiderivative of V(t). So, if we find the antiderivative of V(t)= t, we should get (t^2/2) + C, using the Power Rule for antiderivatives. (k/r+1 * x^r+1). We know that at time 0, our position is 5. Thus, S(0)= 5. So by plugging in these numbers to the antiderivative we found and solving for C, ((0^2/2)+C=5), we get C=5. To know the position at time 2, we would use the equation (t^2/2) + 5 with t=2, to find (2^2/2)+5= 7 Miles from home.

### Subject:English

TutorMe
Question:

Describe the basic structure and content of an academic essay/paper.

Janie D.

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