Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 12, Problem 3RQ
Describe the structure of DNA. Where are the bases, sugars, and phosphates in the structure? Which bases are complementary to one another? How are they held together in the double helix of DNA?
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Describe in detail the structure of DNA. Of what is a nucleotide composed? Which are thepurines and pyrimidines? What are the bonding rules? What kind of bond holds the two DNAstrands together?
If a DNA double helix contains 28% T nucleotides, then what is the percentage of A nucleotides?
(Optional) Describe the structure of DNA, discussing the DNA helix and the base pairs of
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ribosome, and a protein. What are the relative sizes of each of these?
Chapter 12 Solutions
Biology
Ch. 12.1 - Which do you think would be more difficult to...Ch. 12.1 - If viral genetic material had the same structure...Ch. 12.1 - Prob. 1CYLCh. 12.1 - Prob. 2CYLCh. 12.2 - Muscles, Mutations, and Myostatin The sequence of...Ch. 12.2 - Prob. 1CYLCh. 12.3 - describe the process of DNA replication, including...Ch. 12.3 - explain why DNA replication is called...Ch. 12.3 - Muscles, Mutations, and Myostatin "Double-muscled"...Ch. 12.4 - How Much Genes Influence Athletic Prowess?
Ch. 12.4 - explain what mutations are and how they occur?Ch. 12.4 - explain why mutations are rare?Ch. 12.4 - describe the different types of mutations?Ch. 12.4 - Prob. 1TCCh. 12 - If a parental DNA strand has the base sequence...Ch. 12 - Prob. 2MCCh. 12 - Prob. 3MCCh. 12 - The rungs of the DNA double helix consist of a....Ch. 12 - Prob. 5MCCh. 12 - Prob. 1FIBCh. 12 - Prob. 2FIBCh. 12 - Prob. 3FIBCh. 12 - Prob. 4FIBCh. 12 - Prob. 5FIBCh. 12 - Prob. 6FIBCh. 12 - Prob. 1RQCh. 12 - Prob. 2RQCh. 12 - Describe the structure of DNA. Where are the...Ch. 12 - Prob. 4RQCh. 12 - Describe the process of DNA replication.Ch. 12 - How do mutations occur? Describe the principal...Ch. 12 - Prob. 1ACCh. 12 - Genetic information is encoded in the sequence of...
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- What are the bonds that hold the backbone of each DNA strand together called?arrow_forwardWhat kind of bond do nucleotides use to form the DNA backbone?arrow_forwardOne DNA chain of a DNA double helix contains 18% A, 35% T, 28% C, and 21% G. What is the composition of the complementary DNA chain?arrow_forward
- what kinds of interactions stabilize the backbone and the rungs of DNA?arrow_forwardDescribe the structure of DNA. Where are the bases,sugars, and phosphates in the structure? Which basesare complementary to one another? How are they heldtogether in the double helix of DNA?arrow_forwardWhat are double helix structure of DNA?arrow_forward
- A nucleotide is the monomeric building block of the polymer of DNA. To better understand the characteristics of DNA, it is important to understand how the monomers join to form the polymer. Use the following diagram of DNA (and the diagram of a nucleotide in the PowerPoint presentation) to label the listed features: 3' and 5' ends, nucleotide, phosphate group, sugar group, phosphodiester bond, nitrogenous base (pyrimidine and purine), and hydrogen bonds. NHZ NH2 HN OH₂N NH₂ 5. Looking at the polymer, why is a DNA considered antiparallel? 6. Why are the ends of DNA strands named 3' or 5'? 7. How do A:T interactions differ compared to G:C interactions? How does this affect stability of the bond pairs? 8. During gel electrophoresis, to which electrode (+ or -) does DNA migrate? Why?arrow_forwardDescribe the complementary, antiparallel, double-stranded structure of DNA.arrow_forwardWhen comparing the structures of RNA and DNA , which of the following statement is True?A-Only RNA contains 3'-deoxyribise rings B-Both RNA and DNA contain 3'-deoxyribise rings C-Only DNA contains 3'- deoxyribise rings D-Neither RNA or DNA contain 3'-deoxyribise ringsarrow_forward
- Which of the following combinations is nucleotide molecule? The nitrogenous base uracil bonded to ribose and phosphate complemented with the addition of a water molecule A nucleoside resulting from the dehydration reaction between two phosphates, glycerol, and an unsaturated fatty acid. The DNA backbone consisting of three phosphate groups, a 5-carbon nitrogenous base, and a nitrogen-containing sugar residue An ATP molecule is formed by combining adenine, ribose, and three inorganic phosphate groupsarrow_forwardSelect the phrases that accurately describe properties of the most common form of the DNA double helix. DNA contains equal amounts of adenine and thymine and equal amounts of cytosine and guanine. The nitrogenous bases are exposed to the solvent, whereas the sugar-phosphate backbone of each nucleotide strand is in the interior of the double helix. The phosphodiester bonds between nucleotide residues run in opposite directions in the two strands. Base pairs have a spacing of 3.4 Å. A helical turn consists of about 3.4 base pairs.arrow_forwardDescribe the structure of DNA. The two strands of DNA are antiparallel. What does the term antiparallel mean? Describe how DNA is tightly packaged. Your description should include the terms histones, chromatin, nucleosomes and chromosomes.arrow_forward
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