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MMSC 491 EXAM 1 QUESTIONS AND WELL ELABORATED ANSWERS

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MMSC 491 EXAM 1 QUESTIONS AND WELL ELABORATED ANSWERS

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Nonsense Mutations


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singluar base is changed and causes early termination in the sequence adn
now causes a "stop" codon to form




Translocation

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DNA is excahnged in reciprocal way from one chromosome to another




Use mature mRNA as template


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Production of proteins




Splice Sites


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-Important in genetic disease
-Direct the spilicing machinery to cleave and rejoin the DNA frgmnry




Non classical DNA polymerases


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, Required to continue translation after repair
1. Zeta, Eta, Rev1
2. Iota, Kappa
3. Nu
4. Theta
5. Lambda and Mu
6. Terminal deoxynucleotide transferase




Creatuon of rDNA using DNA ligase


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-Cobined the Vector with insert DNA
-Uses PCR or restriction enzymes to join these
-Multipl cloning site is where it has the sequence of all the restrictio sites at
the point the vector or insert can cleave
-Vecotr and insert have to be cut by te restriciton enzyme so that they can
joins
-Needs ligase to covelenlty link them




Missense Mutation


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Changed in 1 base and causes a change in the amino acid that is expressed
2 Types: Conservative and Nonconservative




Hybridization Assays


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, -Exploit the specifity of zationhybridia
-Two single poly nucleotide DNA or RNA or oligonucleotide will stable
dsHybrid only if plenty of base matiching is present
-Can be be selected for perfect matching or two allow for varying degree
of mismatching




Non-ionzing


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-Ultra violet
-Cause covalent bonding between adjacent pyrimidines




Exposure to endogneous and exogenous sources


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-Typically refer to some type of chemical and chemical environments




Go


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Where cells can stop cycling for a period of time, can reeneter back into
the cell cycle

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