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Q112
Q112

... Degradation of templates: Prepare new templates and retry. The amplicon is too long: The length of the amplicon is recommended to be within 100 bp200 bp. e) There are PCR inhibitors in the reaction: They are usually brought in when adding templates. Increase the dilution folds or prepare new templa ...
Student PPT Notes
Student PPT Notes

...  as substrate/enzyme levels increase, the rxn rate increases until active sites of all enzymes are being continuously occupied by a new substrate  Genes that code for enzymes can turn ________________(i.e. marathon runners after high-carb pre-competition meals)  Some enzymes only synthesized at _ ...
Evolutionary Classification
Evolutionary Classification

... DNA Evidence DNA evidence shows evolutionary relationships of species. The more similar the DNA of two species, the more recently they shared a common ancestor, and the more closely they are related in evolutionary terms. The more two species have diverged from each other, the less similar their DNA ...
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... made up of cellulose. 2. (i) Denaturation:Loss of biological activity of native protein when it is subjected to physical change like change in temperature or chemical change like change in pH is called denaturation. Ex. Coagulation of egg white on boiling,curdling of milk(lactose to lactic acid) (ii ...
Chapter 2 The Chemistry of Life Worksheets
Chapter 2 The Chemistry of Life Worksheets

... in organic compounds, so carbon is essential to life on Earth. Without carbon, life as we know it could not exist. Why is carbon so basic to life? The reason is carbon’s ability to form stable bonds with many elements, including itself. This property allows carbon to form a huge variety of very larg ...
Transition bias and substitution models
Transition bias and substitution models

... transversions because – Misincorporation during DNA replication occur more frequently between two purines or between two pyrimidines than between a purine and a pyrimidine – A purine is more likely to mutate chemically to another purine than to a pyrimidine (e.g., through spontaneous deamination) . ...
pdf
pdf

... for every 10 bp unwound. Thus ΔT = -1, and since ΔL = 0, then ΔW = +1 for every 10 bp unwound. This effect of the increase in W will be exerted in the DNA ahead of the polymerase. The effect of rewinding the DNA template by RNA polymerase is just the opposite, of course. T will increase by 1 for eve ...
Prenatal Diagnosis for Inherited Metabolic Disease
Prenatal Diagnosis for Inherited Metabolic Disease

Virginia State Science Olympiad Regional Tournament
Virginia State Science Olympiad Regional Tournament

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Journal Club - Clinical Chemistry

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PCR Reagents

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Application of small interfering RNAs modified by unlocked nucleic

... monomers can be introduced into certain positions of the siRNA without detrimental effects on its silencing activity. Modified control siRNAs were then used to further investigate the specificity of the approach. Some of the most potent modification patterns were selected and the corresponding control ...
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Extremophiles - University of Arizona

... What is the upper temperature limit the recent O. J. Simpson trials. It is also James T. Staley and his colleagues at for life? Do “super-hyperthermophiles” used extensively in modern biological the University of Washington have capable of growth at 200 or 300 degrees research, in medical diagnosis ...
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... species identification, increasing our appreciation for the complexity of the diversity of life. In fact, one researcher’s idea that mtDNA could actually resolve elephant systematics proved to be quite incorrect (Blaxter). But what are the far-reaching impacts of being able to define a species as a ...
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...  Exons: code for aa, because they are expressed  Once mRNA is processed, where do it go?  What happens to the mRNA molecule after processing ...
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... strates are glycoproteins, the original E7 in CI2 was replaced by a cysteine (E7C) to which a high mannose-type glycopeptide derived from bovine thyroglobulin was attached through a bifunctional chemical cross-linker (glycosylated CI2s are to be referred to as GCI2s). The original glutamic acid resi ...
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Chapter 6: Gene Expression
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... The genetic code is a set of rules for determining how genetic information in the form of a nucleotide sequence is converted to an amino acid sequence of a protein. Researchers identified four nucleotides in RNA (A, U, G, and C) and 20 amino acids. Mathematically, there could not be a oneto-one rela ...
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The complete nucleotide sequence of apple mosaic virus (ApMV
The complete nucleotide sequence of apple mosaic virus (ApMV

... all other bromoviruses) are the only region which has sequence homology within the genome of each species. In addition to RNA 3, two other sets of clones were found. Using the BLAST program, one of these sets of clones was found to encode peptides similar to the putative polymerase regions of AMV an ...
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video slide - Human Anatomy

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ELSI Learning Objective

... Biology Learning Objective • Describe the three major types of RNA and their functions. ELSI Learning Objective • Discriminate between jargon and literal uses of terms that can lead to misunderstandings about science. ...
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Deoxyribozyme



Deoxyribozymes, also called DNA enzymes, DNAzymes, or catalytic DNA, are DNA oligonucleotides that are capable of catalyzing specific chemical reactions, similar to the action of other biological enzymes, such as proteins or ribozymes (enzymes composed of RNA).However, in contrast to the abundance of protein enzymes in biological systems and the discovery of biological ribozymes in the 1980s,there are no known naturally occurring deoxyribozymes.Deoxyribozymes should not be confused with DNA aptamers which are oligonucleotides that selectively bind a target ligand, but do not catalyze a subsequent chemical reaction.With the exception of ribozymes, nucleic acid molecules within cells primarily serve as storage of genetic information due to its ability to form complementary base pairs, which allows for high-fidelity copying and transfer of genetic information. In contrast, nucleic acid molecules are more limited in their catalytic ability, in comparison to protein enzymes, to just three types of interactions: hydrogen bonding, pi stacking, and metal-ion coordination. This is due to the limited number of functional groups of the nucleic acid monomers: while proteins are built from up to twenty different amino acids with various functional groups, nucleic acids are built from just four chemically similar nucleobases. In addition, DNA lacks the 2'-hydroxyl group found in RNA which limits the catalytic competency of deoxyribozymes even in comparison to ribozymes.In addition to the inherent inferiority of DNA catalytic activity, the apparent lack of naturally occurring deoxyribozymes may also be due to the primarily double-stranded conformation of DNA in biological systems which would limit its physical flexibility and ability to form tertiary structures, and so would drastically limit the ability of double-stranded DNA to act as a catalyst; though there are a few known instances of biological single-stranded DNA such as multicopy single-stranded DNA (msDNA), certain viral genomes, and the replication fork formed during DNA replication. Further structural differences between DNA and RNA may also play a role in the lack of biological deoxyribozymes, such as the additional methyl group of the DNA base thymidine compared to the RNA base uracil or the tendency of DNA to adopt the B-form helix while RNA tends to adopt the A-form helix. However, it has also been shown that DNA can form structures that RNA cannot, which suggests that, though there are differences in structures that each can form, neither is inherently more or less catalytic due to their possible structural motifs.
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