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672 Chapter 20 NEL Elongation The first codon that is recognized by the ribosome is the start codon AUG. The AUG codon also code ...

NEL Molecular Genetics 673 Section20.2 Met A site 3
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mRNA P site (a) tRNA UAC AGG AGG AUG GCA AUA Met Ala A site ri ...

674 Chapter 20 NEL Termination Eventually, the ribosome reaches one of the three stop codons: UGA, UAG, or UAA. Since these thre ...

NEL Molecular Genetics 675 Section20.2 SUMMARY Gene Expression Purpose Design Analysis Problem Materials Evaluation Hypothesis P ...

676 Chapter 20 NEL Section 20.2 Questions State the central dogma of molecular genetics. 2.Describe the role of the following m ...

NEL Molecular Genetics 677 DNA and Biotechnology 20.320.3 Carpenters require tools such as hammers, screwdrivers, and saws, and ...

678 Chapter 20 NEL A DNA sequencing technique based on the one developed by Sanger was the most common method used in the projec ...

NEL Molecular Genetics 679 Section20.3 combat genetic disorders. The project also may open a Pandora’s box of ethical questions, ...

680 Chapter 20 NEL Restriction Endonucleases Restriction endonucleases, otherwise known as restriction enzymes, are like molec- ...

NEL Molecular Genetics 681 Section20.3 Not all restriction endonucleases produce sticky ends. For example, the restriction endon ...

682 Chapter 20 NEL DNA Ligase To create recombinant DNA, pieces of DNA from two sources must be joined together. Using restricti ...

NEL Molecular Genetics 683 Each PCR cycle doubles the number of DNA molecules. After just 10 cycles there are 210 (over two mill ...

684 Chapter 20 NEL contain the foreign DNA fragment. The bacterial cells are then treated to open pores in the cell membrane, wh ...

NEL Molecular Genetics 685 Section20.3 WEBActivity Case Study—Transformation of Eukaryotes The first transgenic animal and the f ...

686 Chapter 20 NEL Section 20.3 Questions Define restriction endonuclease andmethylase. 2.Restriction endonucleases are found i ...

NEL Molecular Genetics 687 Mutations and Genetic Variation 20.420.4 Mutations are changes in the sequence of the DNA molecule an ...

688 Chapter 20 NEL One type of point mutation, called a silent mutation, has no effect on the operation of the cell. In the sile ...

NEL Molecular Genetics 689 Section20.4 Gene Mutations and Cancer Cancer is considered a genetic disease because it is always ass ...

690 Chapter 20 NEL Inferring Relationships from DNA Sequences At one time, scientists could compare and classify species based o ...

NEL Molecular Genetics 691 Section20.4 Interspersed Elements Other DNA analyses focus on intervening sequences inserted into DNA ...