Lesson 9 - Lesson 9 Reading Assignment Please read and take...

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Chemistry for Today: General, Organic, and Biochemistry
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Chapter 21 / Exercise 21.48
Chemistry for Today: General, Organic, and Biochemistry
Seager/Slabaugh
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Lesson 9 Reading Assignment: Please read and take notes on online Lesson 9 and text Chapters 10, 11, and 12. Course Competencies These Maricopa Community College District course competencies are addressed in this lesson: 1. Describe and analyze the processes involved in the biochemistry of DNA and other biochemicals of genetics (including protein synthesis). 2. Describe and analyze the processes that result in mutations. Lesson Objectives By the end of the lesson the student should be able to: 1. Summarize the research conducted by scientists and describe how their work contributed to the understanding of the chemical structure of DNA. 2. Compare and contrast the chemical composition of DNA and RNA. 3. List and describe the events that occur during each step of DNA replication, transcription, and translation. 4. Define the term mutation and describe how mutations contribute to genetic diversity. 5. Compare and contrast viral replication in bacteria, plants, and animals. 6. Describe the mechanisms of gene regulation in bacteria and animal cells; including an explanation of how the lac operon works. 7. Describe the role that oncogenes and tumor-suppressor genes play in cancer. 8. Define the term recombinant DNA and explain the processes used to create recombinant DNA. 9. Describe the advantages of gene therapy. 10. Discuss the controversy surrounding genetic engineering. Assignments: DUE 11/14 Quiz 7 ( Lesson 9 Quiz 7 ) Lab Practical 2 ( Lab Practical 2 )
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Chemistry for Today: General, Organic, and Biochemistry
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Chapter 21 / Exercise 21.48
Chemistry for Today: General, Organic, and Biochemistry
Seager/Slabaugh
Expert Verified
This is a “closed-book” lab practical covering the material that you have learned in Labs 5 thru 7. You will have exactly 13 minutes to complete all 25 questions. After your 13 minutes has passed, the practical will automatically be submitted, whether you have completed it, or not. You only have ONE attempt to complete this lab practical. Neither additional time, nor additional chances/submissions will be allowed. When you are ready to use your one, 13-minute chance to complete the lab practical, please click the “ Lab Practical 2 ” link from under the “Assessments and Due Dates” tab of our course page. The password to enter the practical is biology100. Once you have started the lab practical you cannot stop your 13-minute access clock. Again, neither additional time nor additional attempts will be allowed. Lesson 9 : The Structure and Function of DNA and How and Why Genes Are Regulated DNA: STRUCTURE AND REPLICATION * DNA: * Has the capacity to store genetic information * Can be copied and passed from generation to generation * DNA and RNA are nucleic acids. * They consist of chemical units called nucleotides . * The nucleotides are joined by a sugar-phosphate backbone . * The four nucleotides found in nucleic acids differ in their nitrogenous bases. These bases are: * Thymine (T) is in DNA only
RNA has uracil (U) in place of thymine (T). * Cytosine (C) * Adenine (A) * Guanine (G) * The model of DNA is like a rope ladder twisted into a spiral. (see Watson & Crick and Rosalind Franklin) * The ropes at the sides represent the sugar-phosphate backbones. * Each wooden rung represents a pair of bases connected by hydrogen bonds. * DNA’s nitrogenous bases pair in a complementary fashion: * Adenine (A) pairs with thymine (T) When RNA is transcribed or translated, A pairs with U * Cytosine (C) pairs with guanine (G) DNA Replication * When a cell reproduces, a complete copy of the DNA must pass from one generation to the next. *

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