Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 12.3, Problem 1CC
In Figure 12.14, why do the nuclei resulting from experiment 2 contain different amounts of DNA?
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Suppose the experiment of Meselson and Stahl was performed on a sample of 8 cells, each containing one copy of its circular double-stranded DNA genome, and that had been growing on normal 14N medium. You then grew the cells for 3 generations in medium containing 15N. The outcome would be
A) 8 cells with single-stranded DNA molecules with 14N, and 24 cells with single-stranded DNA molecules with 15N. B) 16 cells with double-stranded DNA molecules with equal amounts of 14N and 15N, and 48 cells with double-stranded DNA molecules with 15N. C) 8 cells with double-stranded DNA molecules with equal amounts of 14N and 15N, and 24 cells with double-stranded DNA molecules with 15N. D) 8 cells with double-stranded DNA molecules with equal amounts of 14N and 15N, and 32 cells with double-stranded DNA molecules with 15N. E) 65 cells with single-stranded DNA molecules with 15N.
Neema wants to determine whether or not the nucleus of a cell differs in the chemical compounds they contain or not from species to species. She is planning on working with the nucleus of a human and the nucleus of a mouse. She has removed all of the DNA from each nucleus, then has selected and isolated one DNA fragment from each species. What results can Neema expect if she takes the human DNA fragment and inserts it into the mouse nucleus and then inserts the mouse DNA fragment into the human nucleus? Use your knowledge of DNA replication to answer.
What results would you expect if the bacteriophage that Hershey and Chase used in their experiment had contained RNA instead of DNA?
Chapter 12 Solutions
Campbell Biology
Ch. 12.1 - How many chromosomes are drawn in each part of...Ch. 12.1 - WHAT IF? A chicken has 78 chromosomes in its...Ch. 12.2 - How many chromosomes are shown in the illustration...Ch. 12.2 - Compare cytokinesis in animal cells and plant...Ch. 12.2 - During which stages of the cell cycle does a...Ch. 12.2 - Compare the roles of tubulin and actin during...Ch. 12.2 - A kinetochore has been compared to a coupling...Ch. 12.2 - MAKE CONNECTIONS What other functions do actin...Ch. 12.3 - In Figure 12.14, why do the nuclei resulting from...Ch. 12.3 - How does MPF allow a cell to pass the G2 phase...
Ch. 12.3 - MAKE CONNECTIONS Explain how receptor tyrosine...Ch. 12 - Differentiate between these terms: chromosome,...Ch. 12 - In which of the three phases of interphase and the...Ch. 12 - Explain the significance of the G1, G2, and M...Ch. 12 - Through a microscope, you can see a cell plate...Ch. 12 - Vinblastine is a standard chemotherapeutic drug...Ch. 12 - One difference between cancer cells and normal...Ch. 12 - The decline of MPF activity at the end of mitosis...Ch. 12 - In the cells of some organisms, mitosis occurs...Ch. 12 - Which of the following does not occur during...Ch. 12 - Cell A has half as much DNA as cells B, C, and D...Ch. 12 - The drug cytochalasin B blocks the function of...Ch. 12 - VISUAL SKILLS The light micrograph shows dividing...Ch. 12 - DRAW IT Draw one eukaryotic chromosome as it would...Ch. 12 - EVOLUTION CONNECTION The result of mitosis is that...Ch. 12 - SCIENTIFIC INQUIRY Although both ends of a...Ch. 12 - WRITE ABOUT A THEME: INFORMATION The continuity of...Ch. 12 - SYNTHESIZE YOUR KNOWLEDGE For selected answers,...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- At the end of an experiment, you extract DNA from ten yeast colonies. You divide the DNA from each colony into two tubes, and send all twenty samples for sequencing. How many experimental replicates do you have?arrow_forwardTwo experimental tubes contain an equal number of nucleic acid molecules with the sequence 5’ AGCAGG 3’. The first tube contains single-stranded DNA and the second tube contains RNA. Which tube contains the greater mass? Explain your answer.arrow_forwardIn Figure 7-7, do you recognize any of the componentsused to make Watson and Crick’s DNA model? Wherehave you seen them before?arrow_forward
- You have 2 solutions of DNA. Solution 1 contains single stranded viral DNA while Solution 2 has double stranded form of the same viral DNA. Both solutions contain 1 mg/ml of DNA. You then expose each of these solutions to UV light at 260 nm. Which of the following results would you expect to see after UV light exposure? a.Neither solution will absorb any UV light but the DNA in both solutions will be broken by the action of the UV light. b.Solution 1 will absorb less light than Solution 2 c.Solution 1 will absorb more light than solution 2. d.Nothing will occur. DNA can only absorb UV light if it is interchelated with ethidium bromide. e.Both solutions will absorb the same amount of light since their concentrations are the same.arrow_forwardwhat does the Depletion of essential gene products causes spontaneous DNA damage major result mean in this experiment? (interpretation)arrow_forwardThe Bacteria Escherichia coli DNA genome has a molecular mass of about 3.1 X 10° D. In your answers, show how you came up to each result? (a) How many base pairs does this bacterium contain? (b) How many full double-helical turns does this DNA contain? (c) How long is this DNA in µm?arrow_forward
- suppose there are three tubes containing DNA RNA and protein samples in THE laboratory. the three tubes are unlabeled and are shuffled, how will you identify them?arrow_forwardIn Figure 10-14, why does DNA migrate to the anode(+ pole)?arrow_forwardWhat would happen in the experiment illustrated in Figure if the DNA and RNA that are mixed together came from very different organisms, for example a worm and a pig?arrow_forward
- If RNA were the universal genetic material, how would this have affected the Avery experiment and the Hershey–Chase experiment?arrow_forwardIf you tiled a floor with the planar rings from the bases of all the DNA molecules of living creatures on Earth, approximately how many times could you cover the Earth’s surface? This is meant to be an estimation/Fermi problem so it does not have to be exact.arrow_forwardDoes the design of the Hershey–Chase experiment distinguish between DNA and RNA as the molecule serving as the genetic material? Why or why not?arrow_forward
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DNA vs RNA (Updated); Author: Amoeba Sisters;https://www.youtube.com/watch?v=JQByjprj_mA;License: Standard youtube license