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1406 final exam guide.doc
1406 final exam guide.doc

... Final Exam Study Guide Dr. H. I. Chukwu ...
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ch 20 study guide: dna technology

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MolecularBiology1APLab6
MolecularBiology1APLab6

... • Enzymes that cut DNA at very specific base sequences (often palindromes) • Make blunt or sticky ends • Evolved to combat invasive DNA from viruses • Does not cut bacterium’s DNA because it’s missing correct DNA sequence • Different bacterial strains have different RE ...
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...  Mutations in the _____________ may not be as serious  Mutations in _____________ mean that the mutation is permanent.  Mutations bring ___________ to a species.  Mutations can be ________________ and _____________ ...
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... Identify the 3.2 billion base pairs of DNA that makes up humans  Large portion of DNA does not code, only 1% to 1.5% make proteins  Only 30,000 to 40,000 genes (much less than expected) ...
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... 1) Selective Breeding – a process of selecting a few organisms with _______________ to serve as parents of the ___________ EX: Cows that ___________ milk, vegetables that _____________ 2 Types of Selective Breeding 1) ____________________ – crossing 2 individuals with similar sets of genes to produc ...
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Grade 9 Science Ch 4 - Answers to Comprehensive Questions

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Protein Synthesis Review Concepts • Protein synthesis occurs in two

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Name Ch 12 Study Guide

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E:Med - uni-freiburg.de

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DNA damage theory of aging

The DNA damage theory of aging proposes that aging is a consequence of unrepaired accumulation of naturally occurring DNA damages. Damage in this context is a DNA alteration that has an abnormal structure. Although both mitochondrial and nuclear DNA damage can contribute to aging, nuclear DNA is the main subject of this analysis. Nuclear DNA damage can contribute to aging either indirectly (by increasing apoptosis or cellular senescence) or directly (by increasing cell dysfunction).In humans and other mammals, DNA damage occurs frequently and DNA repair processes have evolved to compensate. In estimates made for mice, on average approximately 1,500 to 7,000 DNA lesions occur per hour in each mouse cell, or about 36,000 to 160,000 per cell per day. In any cell some DNA damage may remain despite the action of repair processes. The accumulation of unrepaired DNA damage is more prevalent in certain types of cells, particularly in non-replicating or slowly replicating cells, such as cells in the brain, skeletal and cardiac muscle.
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