Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 12, Problem 2AC
Genetic information is encoded in the sequence of nucleotides in DNA. Let's suppose that the
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DNA exists in cells as a double-stranded duplex molecule, whereas RNA, which is composed of very similar nucleotides linked together in the same way, does not form a doublestranded duplex in cells. Why not? If you were to place complementary single-strands of RNA in a test tube, would they spontaneously form duplex molecules?
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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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- If the sequence of a gene is: 3'TACATACCAACTGAGGATCGC5' 5'ATGTATGGTTGACTCCTAGCG3' And the RNA that is transcribed from this gene is: 5'AUGUAUGGUUGACUCCUAGCG3' Which strand of the DNA - top or bottom - is the template strand? Explain how you know.arrow_forwardWhy do you think it is important that the sugar-phosphate backbone of DNA be held together by covalent bonds while the two strands of double stranded DNA are held together by hydrogen bonds?arrow_forwardThe compound known as nitrous acid is a reactive chemical that replaces amino groups (−− NH2) with keto groups (== O). When nitrous acid reacts with the bases in DNA, it can change cytosine to uracil and change adenine to hypoxanthine. A DNA double helix has the following sequence: TTGGATGCTGG AACCTACGACC A. What would be the sequence of this double helix immediately after reaction with nitrous acid? Let the letter H represent hypoxanthine and U represent uracil. B. Let’s suppose this DNA was treated with nitrous acid. The nitrous acid was then removed, and the DNA was replicated for two generations. What would be the sequences of the DNA products after the DNA had replicated twice? Your answer should contain the sequences of four double helices. Note: During DNA replication, uracil hydrogen bonds with adenine, and hypoxanthine hydrogen bonds with cytosine.arrow_forward
- why can we not describe the “average” behavior of a DNA molecule? Why is it improbable that proteins needed for DNA structure, for example, form spontaneously from random amino acids?arrow_forwardThe template strand of a double helical segment of DNA consists of the following sequence: 5’-GTAGCCTTAAGCGATCACCGTCCGTATTACTAGTGGCCAGACTCTTTTCACTCTCATGTATAGTTG-3’ What is the nucleotide order in the complementary DNA strand?arrow_forwardDo any strands of nucleic acid exist in nature in which part of the strand is DNA and another part of that same strand is RNA? If so, describe when such strands of nucleic acid are synthesized. Is the RNA component at the 5′ end or at the 3′ end?arrow_forward
- The following diagram of a generalized tetranucleotide will serve as a basis for the three questions marked “a” through “c.” (02) (a) Is this a DNA or an RNA molecule? State which _________ (b) Place an “X” (in one of the circles provided) at the 3' end of this tetranucleotide. (c) Given that the DNA strand, which served as a template for the synthesis of this tetranucleotide, was composed of the bases 5'- A C A G - 3', fill in the parentheses (in the diagram) with the expected basesarrow_forwardDo any strands of nucleic acid exist in nature in which part of the strand is DNA and part is RNA? If so, a.describe when such strands of nucleic acid are synthesized. Is the RNA component at the 5' end or at the 3' end?arrow_forwardWhy do you think all organisms use nucleic acids for encoding genetic information? Why not use proteins or carbohydrates? What advantages might DNA have as the source of genetic information?arrow_forward
- Which of the following strands of DNA (assuming it was bound to its complementary strand to create a double-helix structure) would be the least difficult to break apart? a. 5' - CCGCCGGCATATCCGAT - 3' b. 5' - CCGCGCGATCGGCGCGT - 3' c. 5' - AATGAGGCCAATTGACA - 3' d. 5' - CCACCAGGCACAGCCGA - 3' e. 5' - AAATTGATATATAGGCA - 3'arrow_forwardIf a DNA double helix that is 100 base pairs in length has32 adenines, how many cytosines, guanines, and thymines must it have?arrow_forwardSome proteins such as DNA ligase can temporarily bind to DNA. If such a protein interacts with the sugar-phosphate backbone of DNA, would you expect hydrogen bonding between the protein and the DNA to be involved? Why or why not?arrow_forward
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