Ch.12notes
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chapter 12 notes what is the structure of DNA and How does it function in genetic inheritance? 1. idetiftifying the substance of genes 2. the structure of DNA 3. DNA replication IDENTIFYING THE SUBSTANCE OF GENES A. bacterial transformation 1. Griffiths Experiment 1928 grifiths a scientist that studing nemonia he figured out that bacteria can change. S strain or smooth also can kill you, and R strain or rough also not toxic. heat killed s strain did not kill then a mixture of heat killed s strain and r strain killed. he called this tranformation 2. Transformation what causes bacteria to change 3. in 1944 Avery ran the same experiment. when he destroyed the dna in the heat killed bacteria then mixed and put in a mouse it lived the molecular cause is DNA B,bacterial viruses 1.Bacteriophages
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Transcript of Ch.12notes
chapter 12 notes
what is the structure of DNA and How does it function in genetic inheritance?
1. idetiftifying the substance of genes
2. the structure of DNA
3. DNA replication
IDENTIFYING THE SUBSTANCE OF GENES A. bacterial transformation 1. Griffiths Experiment 1928 grifiths a scientist that studing nemonia he figured out that bacteria can change. S strain or smooth also can kill you, and R strain or rough also not toxic. heat killed s strain did not kill then a mixture of heat killed s strain and r strain killed. he called this tranformation
2. Transformation what causes bacteria to change3.in 1944 Avery ran the same experiment. when he destroyed the dna in the heat killed bacteria then mixed and put in a mouse it lived the molecular cause is DNA
B,bacterial viruses 1.Bacteriophages 2.The hershey chase experiment/ add pic of T4 virus
C. The Role of DNA 1.storing info 2. copying info 3. transmitting info
THE STRUCTURE OF DNA
A.the components of DNA 1. nucleic acids and nucleotides 2. nitrogen bases and covalent bonds or known as strong bonds get pic of nucleic acid
B. solving the structure of DNA 1. Chagrins rule he noticed that A is the same as T and G is the same as C 2. Franklin's X-rays she took X-rays of DNA 3. the work of Watson and Crick get pick of these guys in 1953 took the other info and built a model to explain the structure of DNA
C. the double -helix model or a way of saying twisted ladder get pic of this too 1. anti- parallel strands Steps: 1. DNA unwinds, 2. replication forks forms or areas where new DNA is being made,3. complementary bases are formed or when paired and makes a ladder looking D
2. hydrogen bonding or weak bonding 3. base pairing
III. DNA Replication 1.the replication process 2.the role of enzymes 3. telomers: ends of chromosomeslook in text book pg 350 for DNA replication
B. replication in living cells 1.prokaryotic DNA replication circular/only 2 replication forks 2. eukaryotic DNA replication1000 times bigger/double helix/alot of replication forks
DNA replication is in the S phase
