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Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
Dna structure 12.1 and 12.2 students
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Dna structure 12.1 and 12.2 students

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  • 1. End of 12.1 and 12.2
  • 2.  Nucleotides are made up of 3 things: 1. 5 carbon sugar 2. Nitrogenous (containing nitrogen) bases 3. Phosphate group Nucleic Acids (like DNA and RNA)
  • 3.  The nucleic acid DNA consists of the following: 1. Deoxyribose- sugar 2. A phosphate group 3. A series of 4 nitrogenous bases: cytosine, adenine, thymine, guanine
  • 4.  The nucleic acid RNA consists of the following: 1. Ribose- sugar 2. A phosphate group 3. A series of 4 nitrogenous bases: adenine, uracil, guanine, cytosine
  • 5.  Adenineand Guanine are considered purine
  • 6.  Thymine, Cytosine, and Uracil are considered pyrimidines
  • 7.  DNA is compared to a twisted ladder Ladder Rails- consist of alternating deoxyribose (sugar) and phosphate group A purine base always bonds with pyrimidine Bases are held together by hydorgen bonds
  • 8.  The direction or orientation of the The carbon in the sugar molecules are numbered The leading strand starts with the 3’ (five prime) end The lagging strand runs in the reverse direction This orientation of the
  • 9.  Length of a human chromosome ranges from If a DNA strand 140 million nucleotides long In order for all of the DNA to fit into microscopic cells, the
  • 10.  The phosphate groups in DNA create a negative charge The structure of DNA wound around
  • 11.  DNA replication is considered semiconservative replication- because this process consists
  • 12.  DNA replication occurs during interphase of the cell cycle- There are 3 main stages to semiconservative replication:
  • 13.  Helicase-is an enzyme used to When DNA is unzipped, the hydrogen bonds between the bases
  • 14.  DNA polymerase- enzyme that catalyzes the addition of appropriate nucleotides There are a plethora of nucleotides floating in the cell waiting to be DNA polymerase ensures that each base binds to its compliment
  • 15.  DNA polymerase adds the nucleotide bases to the 3’ end of the In this way, the templates allow identical copies of
  • 16.  The leading strand is replicated from 3’ to 5’ end The lagging strand is synthesized discontinously in segments called Okazaki fragments by the DNA The lagging strand is oriented in the 5’ to 3’
  • 17.  DNA ligase- is an enzyme that connects all the fragments of

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