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Recombinant DNA and Cloning
Recombinant DNA and Cloning

... cells. Break apart the cells and then wash, centrifuge, and use other purification techniques. • • Cut the DNA into millions of small fragments using restriction enzymes. Each DNA piece may be as large as 10 kb, but is more commonly 1 to 5 kb. • • Mix the DNA fragments with plasmids that have been c ...
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... - The cell is the basic structural, functional, and biological unit of all known living organisms - A cell is the smallest unit of life that can replicate independently - The volume of the cell is filled with the cytoplasm, a crowded solution of many different types of molecules embedded in a soluti ...
The Two Percent Difference
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... Jonathan Marks explains that the similarity between chimpanzee and human DNA is misunderstood: “…it sounds profound, but only when presented without the context that human DNA is statistically constrained to match banana DNA over 25 percent of the time.” (2002, p. 4) Since there are only four nucleo ...
Sex linked inheritance, sex linkage in Drosophila and man, XO, XY
Sex linked inheritance, sex linkage in Drosophila and man, XO, XY

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How does DNA determine the traits of organisms?
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... How does DNA determine the traits of organisms? (A review of transcription and translation) Introduction In this assessment, you will examine the DNA sequence of a fictitious organism: the Snork! Snorks were discovered on the planet “Dee Enae” in a distant solar system. Snorks have only one chromoso ...
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AP Biology Genes Review Questions Experiments by Avery

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Reverse Transcriptase -- (RNA
Reverse Transcriptase -- (RNA

... as RNA dependent DNA polymerase, is a DNA polymerase enzyme that transcribes single stranded RNA into double-stranded DNA. It also helps in the formation of a double helix DNA once the RNA has been reverse transcribed into a single strand cDNA. Normal transcription involves the synthesis of RNA from ...
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... A 200 W lamp is connected to 100 volts supply. The number of electrons passing through the lamp in one minute is(charge of an electron =1.6 X 10-19C): (1) 1x1019 (3) 7.5x1020 ...
Recitation Section 17 Answer Key Recombinant DNA and Cloning
Recitation Section 17 Answer Key Recombinant DNA and Cloning

... E. coli cells that have incorporated a plasmid are said to be transformed. 2. Where have we encountered a transformation before? In the Griffith and Avery experiments, live but not virulent bacteria mixed with dead virulent bacteria gave rise to the live virulent bacteria. The process was termed tra ...
chromatin fiber
chromatin fiber

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coding region of DNA. o Introns – non
coding region of DNA. o Introns – non

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CHAPTER 17 - HCC Learning Web
CHAPTER 17 - HCC Learning Web

... • During the elongation stage, amino acids are added one by one to the preceding amino acid at the C-terminus of the growing chain • Each addition involves proteins called elongation factors and occurs in three steps: codon recognition, peptide bond formation, and ...
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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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