head: STRUCTURE OF DNA Structure of DNA University Of Phoenix Principles of Biology BIO/101 Phil Clifford January 13‚ 2009 Structure of DNA Since the beginning of human history‚ people have been intrigued how traits are inherited from one generation to the next. What is DNA? DNA‚ or deoxyribonucleic acid‚ is the hereditary material in humans and almost all other organisms. Most DNA is located in the cell nucleus (called nuclear DNA)‚ but a small amount of DNA can also
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Associate Program Material DNA Worksheet Answer the following in at least 100 words: 1. Describe the structure of DNA. DNA molecules are composed of two strands that form a helical ascending spiral. They fit together like the opposing teeth of a zipper and are held together by weak interactions called hydrogen bonds. These two strands is a long string of subunits called nucleotides‚ each attached to the one immediately about it and the one immediately below it to form a long chain. Each
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chromosomes are very long compact coils of DNA (Deoxyribonucleic Acid) that store all the information that the body inbeds such as how one looks and functions. This paper will first describe the structure of DNA; second discuss how the structure of DNA allows it to serve as the basis for inheritance‚ third examine how meiosis allows DNA to be divided into gametes and finally‚ describe how this relates to Gregor Mendel’s patterns of inheritance. The structure of DNA DNA is a thread formed by two strands
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DNA helicase -separates strands of nuclei acid‚ breaks H bond between nitrogenous bases.‚ works at the replication fork -DNA PRIMASE- lays RNA primer ‚ acts as new strand‚ can only add nucleotides to a free3’ end ‚ lays nucleotide with a 5’ orientation -DNA POLYMERASE 3- adds nucleotides using base pair rules lcreating 2 new daughter strands‚ only adds to a free 3’end and lays down nucleotide with 5’ orientation. Pol3 continuously synthesizes new daughter cell(leading strand) same direction as
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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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DNA STRUCTURE AND REPLICATION One may wonder how a single cell becomes two cells‚ and why this is ultimately important to life. For this essay‚ it would be much too difficult to discuss the process of cell division‚ which is the biological basis of life. That being said‚ this essay will examine more closely the precursor to cell 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
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Discovery of the Structure of DNA Determining the structure for DNA was one of the outstanding science achievements of the 20th century. It started in the late 1940’s‚ when scientists were aware that DNA was most likely the molecule of life‚ even though many were sceptical since it was so "simple." They also knew that DNA included different amounts of the four bases: adenine‚ thymine‚ guanine and cytosine (usually abbreviated A‚ T‚ G and C)‚ but nobody knew what the molecule might look like. Some
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DNA STRUCTURE AND FUNCTION QUIZ Provide answers to each of the following. You may consult your text and fellow students. Each numbered item counts 2 points. 1. If one strand of a DNA double helix has the sequence GTCCAT‚ what is the sequence of the other strand? a. ACTTGC b. CUGGTU c. CAGGTA d. CAGGUA e. TGAACG 2. If a strand of DNA has the sequence AAGCTC‚ transcription will result in a(n) ______. a. single DNA strand with the sequence TTCGAG
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Ka Zhu The Importance of the Structure of DNA Understanding ideas at a macroscopic scale is simple. Looking at a clock‚ observing and understanding the movements of the hands over the numbered surface are‚ in essence‚ all one requires to use the device. In order for innovation to occur‚ it is imperative to understand the inner workings of the device on a microscopic scale to modulate its properties. Such is the case for many innovations in science‚ from the heat engine to penicillin‚ and is no
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Describe the structure of DNA and discuss how it facilitates the ability of DNA to act as genetic material • Compare and contrast prokaryotic and eukaryotic chromosomes • Describe the process of DNA replication as a semi-conservative process. Compare and contrast the synthesis of the leading and lagging strands in DNA replication. • Explain how the genotype of an organism determines its phenotype. • State the central dogma of genetics and explain the roles of DNA and RNA in
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