arrangement of amino acids in a-helix and b-pleated sheet regions of polypeptides. What type of intermolecular forces are involved in maintaining protein secondary structure? A: Amino acids are linked together in such an arrangement that they form long polypeptide chains. The alpha helix is formed when the polypeptide chains twist in a spiral manner. This enables all of the amino acids in the chain to form hydrogen bonds with each other. An example of an alpha helix assembly is fingernails. The
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Irahani‚ Shara-aisa A. BEEd-I EdSci 102-A Feb. 18‚ 2014 “Race for the Double-Helix” What were your first impressions of the main characters? James Watson: An American biologist man who has a research about the DNA. For me‚ James Watson at first was a bit weird guy because of the way he stared and looked at people around him. He is a mysterious guy and a bit naughty to the ladies he has seen. As one of the character said‚ he is the “boy-wonderer”. He is also a very
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Adam Gruber 9/16/14 Life Science Professor Nicholas Double Helix Watson and Crick decide to use a unique way to figure out the structure of DNA. What other scientist’s method did they decide to use and what was the method? The method Watson and Crick decided to use to figure out the structure of DNA was x-ray diffraction photography‚ which was Wilkin’s original method. Crick sends Watson to a seminar at King’s college where Rosalind Franklin speaks about her work on the structure of DNA. What
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Z-DNA; Comparison of A‚ B and Z-DNA; • Discovery of Z-DNA in vitro and in living cells; • Z-DNA and human genetic diseases Role of Major and Minor Grooves in Gene Regulation Major Groove Helix‐turn‐helix (HTH) Motif and Homeodomain proteins (hox or HOM gene cluster) Properties of a B‐DNA Double Helix Major grooves are the primary access points for regulatory proteins to recognize genes Major grooves are the primary access points for regulatory proteins to recognize genes AXIS
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James Dewey Watson For my biography‚ I decided to write about the biologist James Dewey Watson. He was born during the 1920’s. Along the side of Francis Crick‚ he was famous for the discovery of the DNA double helix. The way we look at the composition of the human body is different because of them and their research. James Watson was born on April 5‚ 1928 to the parents of James D. Watson and Jean Mitchell. His father back round was of English descent and his mother’s
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Define the term double helix. The term double helix is two strands of DNA that twist around each other. Anti-Parallel 6. In the space below‚ draw a section of DNA‚ showing two anti-parallel strands of three nucleotides. Label the bonds which hold the bases together as well as the correct complementary base pairs. Also include the 3’ and 5’ linkages (and ends)‚ and the distinction between purines and pyramidines. 7. Explain the relevance of the following in the double-helix structure of
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MOLECULAR STRUCTURE OF DNA AND RNA •Adapted from Chapter 9 in Genetics: Analysis and Principles (Robert J. Brooker) Copyright ©The McGraw-Hill Companies‚ Inc. Permission required for reproduction or display IDENTIFICATION OF DNA AS THE GENETIC MATERIAL • To fulfill its role‚ the genetic material must meet several criteria – 1. Information: It must contain the information necessary to make an entire organism – 2. Transmission: It must be passed from parent to offspring – 3. Replication:
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organisms and copies their DNA. The initiation of DNA replication starts with two steps. First an initiator protein unwinds a short stretch of the DNA double helix. Then a protein called helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands‚ pulling apart the two strands. DNA replication starts when one double-stranded DNA molecule produces two identical copies of the molecule produces two identical copies of the molecule. DNA replication is one of the most
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containing deoxyribose (sugar)‚ consisting of complex molecules‚ present in the chromosomes of all plant and animal cells‚ and carrying in coded form instructions for passing on hereditary characteristics. The DNA molecule takes the shape of a double helix‚ a simple structure that resembles gently twisted ladders. The rails of the ladder are made of pairs of nitrogen-containing nucleotides‚ which are subdivisions of DNA. Because each nucleotide within a rung of the DNA ladder is always paired with
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division‚ also known as DNA replication. DNA replication is the process of copying a double-stranded DNA strand on a chromosome within a cell. The process‚ in its totality‚ is a sequence of three basic steps: initiation‚ elongation‚ and termination. To understand the process of DNA replication‚ you much first be familiar with the structure of DNA. Resembling a twisted ladder or a zipper‚ DNA is a double helix formed with nucleotides (structural units of DNA containing a base‚ a sugar‚ and one
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