EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 4.1, Problem 1R
Summary Introduction
To review:
The differences between purines and pyrimidines are based on these differences, their relationship with the structure of deoxyribonucleic acid (DNA).
Introduction:
All the
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Name three intermolecular forces that stabilize the shape ofbDNA, and explain how they act.
TRUE or FALSE
a) The deoxyribose connects to N9 of guanine.
b) In a dsDNA, a pyrimidine in one chain is always paired with a purine on the other chain because of this arrangement, the molecule is 2nm wide along its entire length. Example is A with G or C with T.
what is mtDNA?
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EBK LIFE: THE SCIENCE OF BIOLOGY
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- What is the role of euglenoids and its dagram?arrow_forwardAccording to Chargaff's rule of nitrogenous base pairing, which of the following statements is correct? If all adenine bonds to thymine and all cytosine pairs with guanine, then the sum of all adenine will never be equal to the sum of all thymine in a DNA molecule. If all adenine bonds to thymine and all cytosine pairs with guanine, then the sum of all adenine will never be equal to the sum of all thymine in an RNA molecule. If all adenine bonds to thymine and all cytosine pairs with guanine, then the sum of all adenine equals the sum of all thymine in a DNA molecule. If all adenine bonds to uracil and all cytosine pairs with guanine, then the sum of all adenine will never be equal to the sum of all uracil in an RNA molecule.arrow_forwardIn 1953, Watson and Crick discovered the structure of DNADNA by examining data from many different experiments. How did using Chargaff’s data help Watson and Crick determine the structure of DNADNA?arrow_forward
- When an aromatic hydrocarbon intercalates between two stacked base pairs, what effect may there be on DNA structure?arrow_forwardWhich positions in the purine ring of a purine nucleotide in DNAhave the potential to form hydrogen bonds but are not involved in Watson-Crick base pairing?arrow_forwardWhat is the complete base composition of a double- stranded eukaryotic DNA that contains 22% guanine?arrow_forward
- Analysis of a DNA sample from the nuclei Of pink snapdragons Determined that the thymine content Of the nucleotides In the DNA was 23%. What Is the likely content of adenine, Cytsoine, And guanine In the DNA?arrow_forwardWhat are Okazaki fragments? Why are they formed?arrow_forwardWhat are the two advantages of using sequence analysis of ribosomal components in determining the relatedness of organisms? please explain why each is an advantage.arrow_forward
- What is The crucial role of base pairing betweencodon and anticodon?arrow_forwardEscherichia coli dsDNA contains 51% GC on a molar basis. What are the mole percentages of A, T, G and C respectively?arrow_forwardBased on Chargaff’s rules, if a segment of DNA is composed of 20% adenine (A) bases, what is the percentage of guanine (G)?arrow_forward
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