Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 13, Problem 13TYU
FOCUS ON EVOLUTION
Some bacteria may be able to respond to environmental stress by increasing the rate at which mutations occur during cell division. How might this be accomplished? Might there be an evolutionary advantage of this ability? Explain.
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Chapter 13 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 13.1 - Given a polynucleotide sequence such as GAATTC,...Ch. 13.1 - Prob. 2CCCh. 13.2 - What role does base pairing play in the...Ch. 13.2 - Make a table listing the functions of seven...Ch. 13.2 - MAKE CONNECTIONS What is the relationship between...Ch. 13.3 - Describe the structure of a nucleosome, the basic...Ch. 13.3 - What two properties, one structural and one...Ch. 13.4 - Prob. 1CCCh. 13.4 - DRAW IT One strand of a DNA molecule has the...Ch. 13.4 - Describe the role of complementary base pairing...
Ch. 13 - In his work with pneumonia-causing bacteria and...Ch. 13 - What is the basis for the difference in how the...Ch. 13 - In analyzing the number of different bases in a...Ch. 13 - The elongation of the leading strand during DNA...Ch. 13 - Prob. 5TYUCh. 13 - Prob. 6TYUCh. 13 - Prob. 7TYUCh. 13 - Prob. 8TYUCh. 13 - Prob. 9TYUCh. 13 - MAKE CONNECTIONS Although the proteins that cause...Ch. 13 - Prob. 12TYUCh. 13 - FOCUS ON EVOLUTION Some bacteria may be able to...Ch. 13 - FOCUS ON ORGANIZATION The continuity of life is...
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- Proteins like channels embedded within the cell's plasma membrane and enzymes scattered in the cytoplasm carry out vital functions. Can you explain the steps of the biological process, allowing cells to make proteins from genes? Can you please provide as many details to each step?arrow_forwardMutations occur randomly during the process of gene expression or by exposure to mutagens. While some mutations are detrimental, others can create proteins that have positive capabilities. In order for a mutation to be passed to future generations, what must be true about the mutation? * O It must occur during the first stage of DNA replication. O It must result in a longer polypeptide chain than normal. O It must be exposed to extensive radiation. O It must occur in cells that give rise to gametes.arrow_forwardRandom mutations only very rarely result in changes in a protein that improve its usefulness for the cell, yet useful mutations are selected in evolution. Because these changes are so rare, for each useful mutation there are innumerable mutations that lead to either no improvement or inactive proteins. Why, then, do cells not contain millions of proteins that are of no use?arrow_forward
- . Early in development, most human cells turn off expression of an essential component of telomerase, the enzyme responsible for addition of telomere repeat sequences (5’-TTAGGG) to the ends of chromosomes. Thus, as our cells proliferate their telomeres get shorter and shorter, but are normally not lost over the course of a lifetime. If cells are removed from the body and grown in culture, however they ultimately enter a state of replicative senescence and stop dividing when their telomeres get too short. By contrast, most human tumor cells express active telomerase, allowing them to maintain their telomeres and grow beyond the normal limit imposed by senescence - good for them, bad for us. Anticipating a universal cure for cancer, you set up a company to screen chemical ‘libraries’ for telomerase inhibitors. The company share price takes a dive, however, when a rival group generates a strain of telomerase-knockout mice. These mice breed happily for several generations, but…arrow_forward51. In conjugation, the F+ cell ................................ Group of answer choices serves as a recipient makes competence factors can transfer DNA to other F+ cells contains information for sex pili don't have conjugation pili 52. Bacterial cells when placed in an hypertonic environment ( more solute outside cells compared to inside ) Group of answer choices initiates sporulation process neither of the above happens undergo plasmolysis undergo osmotic lysis germination occursarrow_forwardThere are close to 200 different cell types in the human body. Why do they look and function differently from one another? O They each express a different set of genes O They each express all the same genes, but in a different order at different times O They each have slightly different genomes O They all express the same genes, but proteins that aren't needed in a particular cell type are degraded before they can function QUESTION 10 When you exercise, you typically start breathing harder. This is because: O You are switching from aerobic to anaerobic respiration O More oxygen is needed to meet the increased ATP demand O Carbon dioxide stores are quickly depleted during exercise Muscle cells can only use aerobic respirationarrow_forward
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