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DNA (Deoxyribonucleic acid)
DNA (Deoxyribonucleic acid)

... Above is an example of a nucleotide. In DNA, the sugar is deoxyribose and the organic base is either: A T ...
1-3 - PLOS
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... Re-annealing of the device under specific population regimes (depicted in Figure 3) converts almost all the population of devices (which are initially exclusively homo-duplex) to being hetero-duplex, with only a small fraction remaining homo-duplex molecules. Specifically, the outcome of this in vit ...
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general steps of gene cloning

any molecule that is present in living organisms. Carbohydrates
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Biomolecules - Pearland ISD
Biomolecules - Pearland ISD

... Enzymes accelerate, or catalyze, chemical reactions No living organism can Function WITHOUT Enzymes Enzymes: ...
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Enzyme POGIL-PCR
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... to anneal before the Taq polymerase catalyzes the reactions to incorporated new nucleotides into the complimentary strands. The cycle is then repeated over and over until there are millions of copies of the target DNA. 3. EXPLAIN why this bacterial polymerase is used for PCR instead of human polymer ...
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... Nucleic acid insights into present and past microbial activities in marine sediment William D Orsi, Aquaculture and Restoration Ecology Laboratory, University of Maryland Marine sediment contains the largest reservoir of reactive carbon on Earth, which represents a vast habitat for microbial life. H ...
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Genetic Engineering
Genetic Engineering

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PCR-assay of intragenic DNA lesions induced by ionizing radiation

... radiation(for example, see [1, 2]). But no wide molecular analysis of gene mutations induced by γ-rays and neutrons in animal germ cells was performed so far. In the meantime, a better knowledge of the molecular nature of heritable gene mutations is of great fundamental and applied significance bein ...
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Genes, Chromosomes, and DNA
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... How does DNA code for making proteins (protein synthesis) and how is this process essential to life? - DNA codes for making proteins by using mRNA. That is messenger RNA which is used to synthesize proteins. RNA and DNA can be very alike and different at the same time. RNA uses uracil and DNA uses t ...
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Biology EOCT Review
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Discovering DNA: Structure and Replication
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... 2. Mutation and sexual reproduction lead to genetic variation in a population. 1. e. Students know the role of the endoplasmic reticulum and Golgi apparatus in the secretion of proteins. 3. A multicellular organism develops from a single zygote, and its phenotype depends on its genotype, which is es ...
lecture notes
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...  DNA : deoxyribonucleic acid. Has a sugar backbone attached to a phosphate residue. Is a double helix structure with two complementary chains. Comprises of four different types of bases, A (adenine), T (thymine), C (cytosine), G (guanine)  RNA : much like DNA but has U (uracil) instead of T, among ...
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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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