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 18.3, Problem 1CC
The best estimate is that the human genome contains fewer than 21,000 genes. However, there is evidence that human cells produce many more than 21,000 different polypeptides. What processes might account for this discrepancy?
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The best estimate is that the human genome containsfewer than 21,000 genes. However, there is evidencethat human cells produce many more than 21,000 different polypeptides. What processes might account for thisdiscrepancy?
The human genome has approximately 30,000 genes, but human cells can produce over 100,000 different polypeptides. Explain how this is possible
Approximately what portion of the human genome is composed of repeat sequences?
Chapter 18 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 18.1 - Prob. 1CCCh. 18.2 - Prob. 1CCCh. 18.2 - Explain the advantage of the systems biology...Ch. 18.2 - Prob. 3CCCh. 18.3 - The best estimate is that the human genome...Ch. 18.3 - Prob. 2CCCh. 18.3 - Prob. 3CCCh. 18.4 - Discuss the characteristics of mammalian genomes...Ch. 18.4 - Which of the three mechanisms described in Figures...Ch. 18.4 - Prob. 3CC
Ch. 18.5 - Describe three examples of errors in cellular...Ch. 18.5 - Prob. 2CCCh. 18.5 - Prob. 3CCCh. 18.6 - Would you expect the genome of the macaque (a...Ch. 18.6 - Prob. 2CCCh. 18 - Prob. 1TYUCh. 18 - Prob. 2TYUCh. 18 - Two eukaryotic proteins have one domain in common...Ch. 18 - SCIENTIFIC INQUIRY The scientists mapping human...Ch. 18 - FOCUS ON EVOLUTION Genes important in the...Ch. 18 - FOCUS ON INFORMATION The continuity of life is...Ch. 18 - SYNTHESIZE YOUR KNOWLEDGE Insects have three...
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- What percentage of the DNA in the genome actually corresponds to genes? How much is actually protein-coding exons? What makes up the rest?arrow_forwardOn the basis of current knowledge, the protein-encoding regions account for only about 3% of the human genome. What is the function of the rest of the DNA?arrow_forwardWhat fraction of the human genome consists of transposons and retrotransposons?arrow_forward
- If the bandicoot genome is 3.62 x 109 base pairs, and the "highly repetitive DNA" fraction is composed entirely of copies of sequence 5'TGCGTGTGTGC3' and its complement, how many copies of this sequence are present in the bandicoot genome?arrow_forwardGiven the Percentage Composition of One Nucleotide ina Genome, Can We Predict the Percentages of the OtherThree Nucleotides?arrow_forwardWhat is the central dogma of biology? Describe the molecular processes that accomplish the flow of genetic information as listed by the central dogma?arrow_forward
- The E. coli genome contains 1009 Chi sequences. Do these sequences occur at random, and, if not, how much more or less frequently than random do they occur?arrow_forward. While studying the structure of a small gene that was recently sequenced during the Human Genome Project, an investigator notices that one strand of the DNA molecule contains the following: 20 adenine (A) bases 30 cytosine (C) bases25 guanine (G) bases 22 thymine (T) bases How many of each base is found in the complete double-stranded molecule?arrow_forwardWhat proportion of exons are repeated sequences in the human genome? Is 38% surprising?arrow_forward
- One of the following is a characteristic of eukaryotic genetic material? 1. Eukaryotic genetic material is compacted by wrapping the double-helix around histone proteins to form nucleosomes. 2. Eukaryotic genetic material consists of supercoiled circular DNA molecules complexed with proteins into chromosomes. 3. Eukaryotic genetic material consists of relaxed linear DNA molecules complexed with RNA into a 30 nm fiber. 4. Eukaryotic genetic material is compacted by folding linker regions around non-histone proteins to form a scaffold.arrow_forwardThe region of the normal hemoglobin gene used for genetic testing for sickle cell anemia contains a restriction site such that homozygous normal individuals show two DNA fragments. If a single nucleotide change in hemoglobin destroys that restriction site, then how many DNA fragments will be visible on a gel from individuals that are homozygous mutant? What about heterozygotes?arrow_forward, The E. coli genome is 4.6 Mbp (mega base-pairs). What is the physical length of the E. coli genome?arrow_forward
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