Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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If a DNA double helix contains 28% T
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- Which conformation of DNA – (i) totally double helix, (ii) minimally unwound or (iii) largely unwound – would have the highest relative absorbance at 260 nm. Would a molecule of DNA having a higher content of guanine and cytosine than of adenine and thymine have a higher or lower melting temperature (Tm) than one with the reverse composition?arrow_forwardthe shape of a DNA molecule is a double helix. what makes up the outer regions of the molecule and the 'rungs' of the molecule?arrow_forwardIf 15% of the nucleotides in a sample of DNA contain the base cytosine (C), what are the percentages of bases G, A, and T? Part 1 of 3 G: % Part 2 of 3 A: % ☑ Part 3 of 3 T: %arrow_forward
- Which of the following statements is (are) true? (a) The two strands of DNA run parallel from their 5' to their 3' ends. (b) An adenine–thymine base pair contains three hydrogen bonds. (c) Positively charged counterions are associated with DNA. (d) DNA base pairs are always perpendicular to the helix axisarrow_forwardWhich DNA bases pair with each other? How many hydrogen bonds are shared by each pair?arrow_forward1. a) What does DNA stand for? b)What is the name of the DNA structure?arrow_forward
- Plx asaparrow_forwardWhat role does bonding play in DNA? Where are hydrogen bonds located? Where are covalent bonds located? Why is that significant to the overall structure and function of DNAarrow_forwardIn NOT more than 200 words, explain how the double-helical structure of DNA suggests a mechanism for DNA replication?arrow_forward
- What are the building blocks of a nucleotide? With regard to the 5′and 3′ positions on a sugar molecule, how are nucleotides linkedtogether to form a strand of DNA?arrow_forwardDNA is comprised of four different bases. What are the four different bases? What is so significant about the four different base?arrow_forwardName the four nitrogenous bases that form a DNA molecule.arrow_forward
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