2.04 AP Practice: Part 2

10/15 total points earned.

Question 1 (Worth 5 points)
The boxes described below have the same volume, but different dimensions and surface area. Use this data as the basis for a discussion of beneficial cell shapes.

Essay Submission
When the volume is too large relative to the surface area of the cell, diffusion cannot occur at sufficiently high rates to ensure this. Therefore cells size is wanted to be relatively small. Box A's surface area to volume ratio is the smallest and therefore will be very sufficient for diffusion to occur at a high rate. Box B's surface area to volume ratio is in between Box A and Box C and so therefore will not be very sufficient but diffusion can still occur at a medium rate. Box C has the largest surface area to volume ratio out of the three boxes and so diffusion will be unable to occur at a high rate. We can conclude that Box A would have the most beneficial cell shape as it has the smallest surface are to volume ratio out of the three boxes.
Essay Feedback
You have written an intelligent answer Emerald. Discussing the SAVR and also the shapes of each in reference to the data can earn full credit here.
Points earned: 3

I found this question difficult because I didn’t understand referencing the CELL shapes and the SAVR to make a connection between the two, I was only able to reference the size of the boxes. I think for future reference I should discuss more about the “cells shape” to be able to make a clear reference and connection between the cells and the boxes. I think highlighting key points in the question can be a good strategy for me to use in the future in order for me to understand and answer the question fully.

Question 2 (Worth 5 points)
A student designed an experiment to test whether different concentration gradients affect the rate of diffusion through dialysis tubing. Four