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HIV is the virus that causes AIDS. In the mid-1990s, researchers discovered an enzyme in HIV called protease. Once the enzyme's structure was known, researchers began lookingfor drugs that would fit into the active site and block it. If this strategy for stopping HIV infections were successful, it would be an example of what phenomenon?ANSWER:CorrectChapter 4 Question 5Part AWhen nucleotides polymerize to form a nucleic acid _____.ANSWER:CorrectChapter 4 Question 7Part AWhat feature of single nucleotides provides the energy needed for polymerization when nucleic acids are formed?ANSWER:CorrectNucleic Acid Building BlocksThe nucleic acids DNA and RNA are made from chains of nucleotides. Nucleotides consist of three components: a five-carbon sugar (either ribose or deoxyribose), a nitrogenous baseattached to the sugar’s 1'-carbon, and a phosphate group attached to the sugar’s 5'-carbon.Part A - Components of nucleotidesSort these nucleotide building blocks by their name or classification.Hint 1. Can you identify ribose?Which of the following molecules is ribose?
Hint 2. Can you identify phosphate?Which of the following molecules is phosphate?ANSWER:Hint 3. Can you identify a purine base?Which of the following is a nitrogenous base known as a purine?ANSWER:ANSWER:
CorrectAll of the genetic material in all living organisms is made from these basic building blocks of nucleotides.Part B - Comparing RNA and DNASort the parts of a nucleic acid according to whether each occurs exclusively in DNA, exclusively in RNA, or in both types of nucleic acid.Hint 1. Which sugar is found in deoxyribonucleotides?Which of the following sugars is the sugar found in deoxyribonucleotides?ANSWER:Hint 2. Which base is found exclusively in RNA?Which of the following nitrogenous bases is found in RNA but is not found in DNA sequences?HelpResetglucosesucroseribosegalactosedeoxyribosePhosphateRiboseDeoxyribosePurinePyrimidine