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25 Cards in this Set
- Front
- Back
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True/ False
Most Adult DNA is inactive |
True
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What are the porential benefits of cloning.
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Replacement organs and endangered animals
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What is the main problem with cloning
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The animals have a lot of health insues.
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What was the first Animal Cloned.
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A sheep named Dolly
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Who discovered DNA and when
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Johann Miescher in 1868 by investigating chemical composition of the nucleus
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What did Johann Miescher find in the nucleus
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Isolated organic acid high in phosphrouus called DNA
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What does DNA stand for?
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Deoxyribonucleic acid
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Who discoverd transformation and when
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Griffith in 1928 when attempting to develop a vaccine.
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Which strain of streptococcus pneumoniae is harmful
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The Rough strain is harmless, but the Smooth strain is pathogenic and deadly.
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What transforms bacteria?
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DNA, not protein.
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What is in viruses that infect bacteia?
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Protein and DNA
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What are the four bases?
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Adenine, Guanine, Thymine, and Cytosine
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What doe a nucleotide consist of?
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Deoxyribose (5-carbon sugar)
Phosphate group and a nitrogen-containing base |
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What does A=T and G=C stand for
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The amount of adenine always equals amount of thymine, and amount of guanine always equals amount of cytosine
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Who was Rosalind Franklin?
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Expert in x-ray crystallography went to Kings college in London
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What did Rosalind Franklin find out?
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Concluded that DNA was some sort of helix i 1952
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Ehat did Watson and Crick find
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DNA was a duble helix that consists of 2 nucleotide strands that run in opposite directions. Strands are heldd together by hydrogen bonds between bases.
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Who binds together with A,C,G, &T
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A binds with T, and C binds with G.
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What allows DNA to duplicate?
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because nucleotides are held together by hydrogen bonds which is easily broken
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How does DNA replicate
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Each parent strand remains intact. Every DNA molecule is half "old" and half "new"
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Can mistakes occur during replication?
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Yes
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Can a mistake in DNA Replication be fix? if so how?
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Yes DNA polymerase reads correct sequence from complementary stand and with DNA ligase they repair the incorrect strand
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What is Cloning?
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A genetically identical copy of an idividual
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How are clones made?
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By embryo splitting
(artificial twinning) |
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How do we trun the DNA back on in the nucleus?
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When it is put into the new egg it tends to trun back on
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