Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
Publisher:Michael Cummings
Chapter8: The Structure, Replication, And Chromosomal Organization Of Dna
Section: Chapter Questions
Problem 7QP: List the pyrimidine bases, the purine bases, and the base-pairing rules for DNA.
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Question
Number 8

Transcribed Image Text:7. Label the three main parts of a nucleic acid in Figure 3.
(b)
DIENE
5'
4'C H H С1
H
(a).
0
0
(c)
-CH₂-P-C
0
H
0
3 C -C₂¹ H
HG
Figure 3
8. Every nucleotide contains one of five types of nitrogenous base. List each type
of nitrogenous base in the correct category.
5'
HO OH (H)
(a) Pyrimidines (one organic ring)
(b) Purines (two-ringed)
9. (a) Label each nitrogenous base in the double strand of DNA in Figure 4.
P-C₂
CH₂
0
-CH₂-P-C₂
NH₂
H
3'
№₁
CH₂-P-C₁
H
0
(d)
Expert Solution

Step 1
1)every nucleotide have three parts one nitrogenous base and one phosphate bond and one 5 carbon containing ribose sugars.
there are four main nitogenous base which is present in .Among them, adenine and guanine purine and thymine and cytosine urasil are pyrimidine but in RNA thymine is not present rather uracil is present Which is pyrimidine .
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