Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 25.1, Problem 3CC
MAKE CONNECTIONS Ø In changing from an "RNA world" to today's "DNA world," genetic Information must have flowed from RNA to DNA. After reviewing Figures 17.4 and 19.9, suggest how this could have occurred. Does such a flow occur today?
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Students have asked these similar questions
1. What are the 4 crucial characteristics of genetic material?
Briefly describe how why each characteristic is applicable
to DNA.
2. The following questions are about gene transcription and
translation.
a. Use the nucleotide sequence TGA CTA ACG GCT,
transcribe into mRNA, and translate into a protein.
b. Using this sequence, give an example of a
synonymous, a non- synonymous and indel mutation.
c. Which will have the biggest impact on protein
evolution?
What would be the base sequence of the DNA strandacross from ATTGACTCG? If a DNA molecule was knownto be 20% adenine, predict its percentage of cytosineand explain your answer.
If RNA played a key role in the origin of life,why do cells now use DNA for information storage and proteins to carry out other cellular processes?
Chapter 25 Solutions
Campbell Biology
Ch. 25.1 - What hypothesis did Miller test in his classic...Ch. 25.1 - How would the appearance of protocells have...Ch. 25.1 - MAKE CONNECTIONS In changing from an "RNA world"...Ch. 25.2 - Describe an example from the fossil record that...Ch. 25.2 - WHAT IF? Your measurements indicate that a...Ch. 25.3 - The first appearance of free oxygen in the...Ch. 25.3 - What evidence supports the hypothesis that...Ch. 25.3 - WHAT IF? What would a fossil record of life today...Ch. 25.4 - Explain the consequences of plate tectonics for...Ch. 25.4 - What factors promote adaptive radiations?
Ch. 25.4 - Prob. 3CCCh. 25.5 - Explain how new body forms can originate by...Ch. 25.5 - Why is it likely that Hox genes have played a...Ch. 25.5 - Prob. 3CCCh. 25.6 - How can the Darwinian concept of descent with...Ch. 25.6 - Prob. 2CCCh. 25 - Describe the roles that montmorillonite clay and...Ch. 25 - What are the challenges of estimating the ages of...Ch. 25 - What is the "Cambrian explosion," and why is it...Ch. 25 - Explain how the broad evolutionary changes seen in...Ch. 25 - How could changes in a Single gene or DNA region...Ch. 25 - Explain the reasoning behind the Statement...Ch. 25 - Level 1: Knowledge/Comprehension 1. Fossilized...Ch. 25 - The oxygen revolution changed Earth's environment...Ch. 25 - Prob. 3TYUCh. 25 - Prob. 4TYUCh. 25 - Prob. 5TYUCh. 25 - Prob. 6TYUCh. 25 - Prob. 7TYUCh. 25 - EVOLUTION CONNECTION Describe how gene flow,...Ch. 25 - Prob. 9TYUCh. 25 - WRITE ABOUT A THEME: ORGANIZATION You have seen...Ch. 25 - Prob. 11TYU
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- Working on the Amazon River, a biologist isolated DNA from two unknown organisms, P and Q. He discovered that the adenine content of P was 15% and the cytosine content of Q was 42%. This means that: a. the amount of guanine in P is 15%. b. the amount of guanine and cytosine combined in P is 70%. c. the amount of adenine in Q is 42%. d. the amount of thymine in Q is 21%. e. it takes more energy to unwind the DNA of P than theDNA of Q.arrow_forward→ 읊 https://openvellum.ecollege.com/course.html?courseld-15183778&HepID=fb9c...☆ @ Pearson Copyright O 2019 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy Permissions I Contact Usarrow_forward1. How many genes are needed to sustain life?2. Using a flow diagram, trace the history of the discovery of the DNA as the genetic material?3. Following Chargaff’s rule, what is the percent concentration of other nitrogenous bases if the concentration of Adenine is 21%?4. In the double helix model of DNA by Watson and Crick, what is the distance between successive bases and how many base pairs will complete one full turn?5. Based on literature, the number of genes in the human genome is lower compared to rice but rice have fewer chromosomes and lesser amount of DNA than humans. What is the main reason for this difference in the DNA-gene ratio?6. What are introns? Where are they located in the DNA?7. What are exons? What is their function?8. What proportion in the human genome are actual genes?9. What sequences form most of the human genome? What is their significance in the expression of genes?10. What are tandem repeats?arrow_forward
- Can DNA Adopt Structures of Higher Complexity?arrow_forwardModels of real-world phenomena can reveal important links between structure and function in biology. Describe how the structure of DNA revealed by theWatson and Crick model suggests how it functions in living things.arrow_forwardScientific Inquiry Suppose you are a research assistant ina lab studying DNA-binding proteins. You have been giventhe amino acid sequences of all the proteins encoded bythe genome of a certain species and have been asked to findcandidate proteins that could bind DNA. What type of aminoacids would you expect to see in the DNA-binding regions ofsuch proteins? Explain your thinkingarrow_forward
- Explain and elaborate on the new DNA chain of a daughter DNA double helix and the old DNA chain in the other daughter DNA double helix and its relationship?arrow_forwardGive the biological information in DNA generate an enormous diversity of living organisms?arrow_forwardAll life shares DNA as the hereditary material. From an evolutionary perspective, why do you think this is the case?arrow_forward
- Is the structure of Human DNA same as the Bacteria DNA?arrow_forwardSuppose that life exists elsewhere in the universe. All life must contain some type of genetic information, but alien genomes might not consist of nucleic acids and have the same features as those found in the genomes of life on Earth. What might be the common features of all genomes, no matter where they exist?arrow_forwardImagine that all six of the key players in the discovery of the structure of DNA had agreed to work together from the start. How do you think the processarrow_forward
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