Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 12, Problem 2FIB
Summary Introduction
Introduction:
The nucleotides are the subunits of
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DNA consists of ___________ polymers of DNA which are joined together by ___________________ bonds between the nitrogenous bases. Because there are two strands in DNA, and because they spiral around each other, we call DNA a ________________ helix molecule.
DNA contains _________ polynucleotide strands, each composed of _________ kinds of nucleotides. (Provide two numbers.)
Describe (in detail and using terminology from the course) the structure of a DNA molecule, including the bonds formed across opposite strands and between adjacent nucleotides.
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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- Chemical analysis shows that a nucleic acid sample contains A, U, C, and G. Is this DNA or RNA? Why?arrow_forwardWhat is the smallest unit of DNA is called ________?arrow_forwardDNA is comprised of four different bases. What are the four different bases? What is so significant about the four different base?arrow_forward
- Draw and identify the three parts of a DNA nucleotide.arrow_forwardA large number of nucleotide base pairs along a DNA molecule is a specific region called a _____arrow_forwardGuanine, cytosine, thymine, and __________________ are the four __________________ in DNA. In DNA, guanine always forms hydrogen bonds with __________________. The process of __________________ produces a new copy of an organism’s genetic information, which is passed on to a new cell. The double coiled, “staircase” shape of DNA is called a __________________.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_forwardA ___________ bond is formed by DNA ligase between the deoxyribose sugar of one nucleotide and the _____________ group of another.arrow_forwardWe often describe the shape of DNA as aarrow_forward
- Describe the chemical components of DNAarrow_forwardDuring DNA replication, the enzyme called _______ unwinds the DNA double helix structure, separating the two strands of DNA apart. These two DNA strands serve as templates for synthesis of new DNA. The two strands are held apart by ______ , stabilizing the open "bubble" configuration.arrow_forwardThe primary structure of DNA is held together with ___________ bonds, and the secondary structure is held together with _____________ bonds.arrow_forward
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