structure of the double helix allows for the DNA to be tightly packed into chromosomes. It also provides an extremely stable backbone with the negatively charged phosphates pointing to the outside of the molecule. This charge aids in the attachment of other molecules to the strand of DNA. The strands are anti-parallel‚ meaning that each strand codes for the other strand. If one strand is messed up in replication‚ then there is still another perfect copy on the other side. The double helix is the perfect
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DNA‚ and explain the limitations of those experiments. Give a detailed description of the structure of a polynucleotide‚ and summarize the chemical differences between DNA and RNA. Discuss the evidence that Watson and Crick used to deduce the double helix structure of DNA and describe the key features of this structure. Distinguish between coding and functional RNA and give examples of each type. Describe in outline how RNA is synthesized and processed in the cell. Give a detailed description
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James watson Basic Info: James watson is a biologist‚ zoologist and a geneticist. He is the co-creator of the famous “double helix” A.K.A the physical form of DNA. He was born on the 6th April 1928 and (at the time of writing) he is 88 years old. He speak English and lives in America. Early life: James was born in Chicago in 1928 and was raised under the influence of Catholicism but his Dad did not believe in God. Both of his parents were British migrants that had moved to America. He was educated
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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 b. single RNA strand with the sequence TTCGAG c. DNA double helix with the sequence AAGCTC for one strand and TTCGAG for the
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a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix. The structure of the double helix is kind of like a ladder‚ with the base pairs forming the ladder’s rungs and the sugar and phosphate molecules forming the vertical sidepieces of the ladder. An important property of DNA is that it can replicate‚ or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases. This is important when cells
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chromosomes • Linear • ~ 6000 million base pairs (humans) 2 DNA Replication The Watson-Crick model of DNA immediately suggested a mechanism for replication: DNA Replication Semi-conservative Replication • One “parent” strand + one “daughter” • New double helix – hybrid of old and new BSCI105 P RINCIPLES OF BIOLOGY I BSCI105 P RINCIPLES OF BIOLOGY I 4/8/15 3 Mechanism of DNA Replication DNA Replication What do you need? Enzymes! BSCI105 P RINCIPLES OF BIOLOGY I BSCI105 P RINCIPLES OF
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Chapter 16 Notes: The Molecular Basis of Inheritance Overview: Life’s Operating Instructions In 1953‚ James Watson and Francis Crick introduced an elegant double-helical model for the structure of DNA. DNA‚ the substance of inheritance‚ is the most celebrated molecule of our time. Hereditary information is encoded in DNA and reproduced in all cells of the body. This DNA program directs the development of biochemical‚ anatomical‚ physiological‚ and (to some extent) behavioral traits Early in
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Question 1 1 out of 1 points If you could pick up a single chromosome in your hand‚ what types of macromolecules would you be holding? Answer Selected Answer: e. a‚ b‚ & c Question 2 1 out of 1 points Nucleotides on a single-stranded DNA molecule are connected by: Answer Selected Answer: phosphodiester bonds Question 3 10 out of 10 points The polarity of DNA synthesis is Answer Selected Answer: 5’-->3’
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genetic material that can be passed on from parent to offspring DNA --> Deoxyribonucleic acid It composed of Deoxyribose (5 carbon sugar)‚ a phosphate and a Nitrogonous base (the 4 N-bases are Guanine‚ Cytosine‚ Adenine and Thymine) It is a double helix (looks like a twisted ladder.) DNA is found in the nucleus of most cells Go to www.dnai.org > Timeline Visit the above website‚ read a scientist’s biography‚ watch an interview‚ or work through an experiment to identify scientists‚ dates
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In their 1953 Nature publication‚ Watson and Crick announced their landmark discovery: DNA exists in the form of a right handed‚ three-dimensional double helix. They described their DNA model as two DNA strands connected by hydrogen bonds between complementary bases. Adenine bases are always paired with thymines‚ and cytosines are always paired with guanines. Watson and Crick identified the anti-parallel configuration of DNA strands; each 5’ end of one strand is paired with the 3’ end of its complementary
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