Campbell Biology in Focus (2nd Edition)
Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 39, Problem 7TYU
Summary Introduction

Introduction:

Natural selection is the process by which the organisms that are better adapted to the environment tend to survive and reproduce better than those that are less adapted.

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a) Find a nitrogen base.  What carbon is the base attached to? b) What two nitrogenous bases are held together by 2 hydrogen bonds? c)What two nitrogenous bases are held together by 3 hydrogen bonds?
You will be building a double-stranded DNA molecule, representing a short (20 base) sequence that could be found in a chromosome.  It will have a 3' --> 5' strand and a 5' --> 3' strand. Use two full 12-base-pair DNA models.  a) Upload a photo of a model once the first 6 nucleotides have been inserted to base pair with the two parent strands. b)Upload a photo of DNA polymerase I and Ligase in "action" removing the RNA primer nucleotides and making new phosphodiester bonds. c)Upload a photo of the final two DNA strands, after Termination, identifying the parent and daughter strands of each.
Write down the 12 base-pairs (ex A-T or G-C) contained in the two models you will us from top to bottom below Model 1 bp:   Model 2 bp:
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