3' end The molecular structure of a DNA strand A W BX 0--0 CY 0-P-0 DZ Which of the four labeled bonds was last to form during DNA synthesis? Y -CH, OH

Human Anatomy & Physiology (11th Edition)
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Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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During the synthesis of a DNA molecule, nucleotides are added sequentially to the growing
DNA molecule via bonds between the previously added nucleotide and the next nucleotide.
The figure below illustrates a partial strand of a DNA molecule. W, X, Y, and Z denote differ-
ent chemical bonds on the DNA strand.
5' end
OH
0-P-0
A W
B X
с
o
Y
0
3' end
The molecular structure of a DNA strand
D Z
OP
0
0X CH,
-0-
Which of the four labeled bonds was last to form during DNA synthesis?
W
CH,
OH
Transcribed Image Text:During the synthesis of a DNA molecule, nucleotides are added sequentially to the growing DNA molecule via bonds between the previously added nucleotide and the next nucleotide. The figure below illustrates a partial strand of a DNA molecule. W, X, Y, and Z denote differ- ent chemical bonds on the DNA strand. 5' end OH 0-P-0 A W B X с o Y 0 3' end The molecular structure of a DNA strand D Z OP 0 0X CH, -0- Which of the four labeled bonds was last to form during DNA synthesis? W CH, OH
Expert Solution
Introduction

During DNA synthesis, nucleotides are added to the growing DNA molecule sequentially. The addition of each nucleotide involves the formation of a covalent bond between the 3' OH group of the previously added nucleotide and the 5' phosphate group of the incoming nucleotide. This process continues until the entire DNA molecule is synthesized.

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