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Final Draft
Uploaded: 5 years ago
Contributor: navii93
Category: Biology
Type: Solutions
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Filename:   T7A1Singh.rtf (68.54 kB)
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2 Topic 7 Chapter 8 Assignment A1 DNA (28 points) 1. A nucleotide is made of three parts: a ______phosphate___________________ group, a five carbon ______sugar___________________, and a _______nitrogen__________________ base. 2. In a single strand of DNA, the phosphate group binds to the ____sugar_____________________ of the next group. 3. Chargaff's rule states that the DNA of any species contains equal amounts of ____adenine_____________________ & _______thymine__________________ and also equal amounts of _______cytosine__________________ & ________guanine_________________. 4. In DNA, thymine is complementary to (or pairs with) ____adenine_____________________ ;? cytosine is complementary to ______guanine___________________. 5. In a strand of DNA, if the percentage of thymine is 30%, what would the percentage of cytosine in the same DNA strand be? _______20%__________________. 6. James Watson and Francis Crick with, the help of Rosalind Franklin and others, determined that the shape of the DNA molecule was a _______double helix___________________. DNA Replication 7. Number the steps of DNA replication in the correct order (1, 2, 3): _2____ Daughter strands are formed using complementary base pairing. __1___ DNA unwinds _3____ The DNA of the daughter strands winds with together with its parent strand. 8. Why is DNA replication called “semi-­conservative”? _________half of original is in new strand________________________________ 9. What enzyme unwinds or unzips the parent strand? ________DNA ___helicase_____________________________ 10. What enzyme connects the new nucleotides together and proofreads them? ______________DNA Ligase____________________________________________________ 11. DNA Base Pairing There are base pairing rules for writing complimentary DNA strands for a given strand. A pairs with T C pairs with G In RNA, A pairs with U, instead of T. Write the complimentary DNA strand for each given strand of DNA. 1. C G T A A G C G C T A A T T A G T A U U C G T G A U U A A U · When you have completed this activity, save it as an .rtf file. NOTE: Be sure to save the file as “Week#assignment#lastname.rtf (i.e. T7A1huisman.rtf).

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