Campbell Biology in Focus
Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Chapter 13, Problem 3TYU

In analyzing the number of different bases in a DNA sample, which result would be consistent with the base-pairing rules?

  1. A.    A=G
  2. B.     A + G = C + T
  3. C.     A+ T = G + C
  4. D.    A=C
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What is the purpose of Bromophenol Blue in electrophoresis? a. To follow the progress of the gel as it is running b. It acts as a DNA size ladder or DNA size standards.  c. To allow the electric current to move through the gel. d. To visualize the DNA after the gel has finished running. What is the purpose of acetate in TAE? a. It helps to maintain the pH of the buffer b. To carry electrons to allow the electric current to travel through the gel. c. It is used to stop the action of DNases d. It is required to see the DNA on a UV light.
When working with the gel electrophoresis chamber, what must we keep in mind? A. Keeping the gel flat on the table without any buffer solution B. Not changing your pipette in between DNA samples C. Not shaking the chamber after the DNA has been loaded D. Loading two DNA samples per a single well
Choose the combination of answers that most accurately completes the statement. Why must the lagging strand of DNA be replicated in short pieces? a. because of limited space b. otherwise, the helix will become distorted c. the DNA polymerase can synthesize in only one direction d. to make proofreading of code easier
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