The figure shows that the average distance between base pairs measured parallel to the axis of a DNA molecule is 3.4 A. The average molar mass of a pair of nucleotides is 650 g-mol-1, Estimate the length in cm of a DNA molecule of molar mass 5.1x109 g-mol-1. |cm Roughly how many base pairs are contained in this molecule? D 7.1e6 x base pairs GC Adenine H Thymine OH CH2 N-H CH, HIH O H-N -N- N HH HC OH OH CH Cytosine Guanine GC O H-N H H. AT H-N HH O-P-0- N-H O OH HCo. G C Он (a) Base-pair formation between adenine (A) and thymine (T) and between cytosine (C) and guanine (G). (b) The most common structure of DNA, which is a right-handed double helix. The two strands are held together by hydrogen bonds and other intermolecular forces.

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Chapter1: Biochemistry: An Evolving Science
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The figure shows that the average distance between base pairs measured parallel to the axis of a DNA molecule is 3.4 Å. The average molar mass of a pair of nucleotides is 650 g•mol-1. Estimate the length in cm of a DNA molecule of
molar mass 5.1x109 g•mol-1.
4.0
cm
Roughly how many base pairs are contained in this molecule?
4.0 7.1e6
X base pairs
AT
CG
OH
O-P=D0
G C
TA
Adenine
Thymine
OH
CH2
N-H.......O
CH3
H
-N
N.....
G C
H
A
Он
C G
G C
TA
AT
OH
CH2
Cytosine
Guanine
H.
O.......H-N
H
H'
H
N…**H-N
HLH
O
N-H.....
H2C
OH
TA
OH
CH2
(b) The most common structure of DNA, which is a right-handed double helix. The two strands are held together by hydrogen bonds
and other intermolecular forces.
(a) Base-pair formation between adenine (A) and thymine (T) and between cytosine (C) and
guanine (G).
Transcribed Image Text:The figure shows that the average distance between base pairs measured parallel to the axis of a DNA molecule is 3.4 Å. The average molar mass of a pair of nucleotides is 650 g•mol-1. Estimate the length in cm of a DNA molecule of molar mass 5.1x109 g•mol-1. 4.0 cm Roughly how many base pairs are contained in this molecule? 4.0 7.1e6 X base pairs AT CG OH O-P=D0 G C TA Adenine Thymine OH CH2 N-H.......O CH3 H -N N..... G C H A Он C G G C TA AT OH CH2 Cytosine Guanine H. O.......H-N H H' H N…**H-N HLH O N-H..... H2C OH TA OH CH2 (b) The most common structure of DNA, which is a right-handed double helix. The two strands are held together by hydrogen bonds and other intermolecular forces. (a) Base-pair formation between adenine (A) and thymine (T) and between cytosine (C) and guanine (G).
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