My notes and thoughts from Biology 111, for Friday, September 19, 2008. The entire series can be found here.
As we took our first exam on Wednesday, September 17, there was no lecture for that day.
We took the first part of class to go over the exam results. I had left the exam feeling very good, figuring I was unsure about and may have missed two or three questions. Turns out, I missed eight.
Out of 64 students in 3 sections, the highest score was a 91, the lowest a 29, and the median 67. I scored an 88.
Doc said not to sweat it too much, as the first exam is the one everyone does a little less well on, unfamiliar territory, etc., and he drops the lowest exam score.
I was rather surprised at about 5 of my 8 incorrect answers, thinking to myself, “What the hell were you thinking???? You know better than that!!!” I really pulled some dumb answers from out of my butt to very simple answers.
One of my incorrect answers though, was the molecular formula of maltose (two glucose molecules bonded together). Now, without thinking, I simply answered with double the formula of glucose, stupidly forgetting to subtract the water molecule from the hydrolysis synthesis that is required to form maltose from two glucose molecules (or any disaccharide from two monosaccharides).
Hence the unforgettable graphic I made subsequently. After making that animation, I will never repeat that mistake.
After going over the exam, we moved on to Chapter 6 – A Tour of the Cell.
Notes for that brief lecture are below the fold.