Creighton University BIO 206 Lab Exam Questions With 100% Correct Answers.

standard deviation equation - Answer-1) Subtract each number by the mean and square the result 2) add all values and divide by n-1 3) square root entire thing You find a candy wrapper in the lab when you arrived. Where should you dispose of it? - Answer-A trash can in the hallway What is an example of inappropriate lab behavior? - Answer-Mouth pipetting, d*cking around What is a sign you do something less consistently than your partner? - Answer-Higher standard deviation On a microscope you measure the field to be 200 micrometers with a 4X objective sense. How big is the field when you rotate to the 100X objective lens? - Answer-8 You are given a DNA solution that is 45 ng/microliter. How much do you pipet for 900 ng? - Answer-20 microliter You want to make 50mL of a 2% solution of agar. How much agar do you weigh out? - Answer-1 gram You were given 7.5E6 cells/mL solution. How many cells are present in 100 microliters? - Answer-750,000 You are working with two plasmids: pGEM is 3000 bp and pDuet is 5500 bp. Which will migrate slowest - Answer-Linear pDuet. Supercoiled is after than the linear plasmids and the longer plasmids move slower. Blue gave bacterial colonies the ability to: - Answer-break down both X-gal and ampicillinIn the amylase enzyme activity assays you performed, iodine was important because: - Answer-it is a colorimetric indicator that stained the product of the reaction. In a spectrophotometer, as % transmittance _______________, the amylase catalyzed the conversion of ____________ to __________ - Answer-increases; starch to maltose What affects the affinity of an enzyme for a substrate? - Answer-Hydrogen bonding van der Waals interactions shape and conformation Under normal conditions which of the following stages of C. elegans life cycle does not occur? - AnswerDauer