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What does DNA stand for?
What does DNA stand for?

... Experiment 1­ Bacteria where infected with phages that had  radioactive sulfur atoms in their protein.  They then used a  blender, to separate the bacteria from the phages that  remained outside the bacteria.  None of them showed  evidence of radioactivity. ...
DNA Article
DNA Article

... First,  let  us  begin  by  examining  the  structure  of  a  DNA  molecule.  DNA  is  in  the  shape  of  a  double  helix,   which  looks  like  a  twisted  ladder  or  spiral  staircase.  The  two  sides  of  the  DNA  ladder ...
A reliable and efficient method for deleting
A reliable and efficient method for deleting

... P1-derived artificial chromosomes (PACs) and bacterial artificial chromosomes (BACs) have become very useful as tools to study gene expression and regulation in cells and in transgenic mice. They carry large fragments of genomic DNA (≥100 kb) and therefore may contain all of the cis-regulatory eleme ...
PowerPoint - Project-based Applied Learning
PowerPoint - Project-based Applied Learning

... a chemotherapy drug and use the information you find advise someone about how this drug works and how effective it is at treating cancer. • Your biggest challenge will be to explain the complexities of how your drug works without overwhelming the reader with jargon. But, you will also need to explai ...
Quarter 1 Section 1.7 Name:
Quarter 1 Section 1.7 Name:

... builders how to construct a house, the DNA "blueprint" tells the cell how to build the organism. Yet, how can a heart be so different from a brain if all the cells contain the same instructions? Although much work remains in genetics, it has become apparent that a cell has the ability to turn off mo ...
DNA/RNA/Protein Synthesis Pre-Test
DNA/RNA/Protein Synthesis Pre-Test

... 2. __Sugar/Phosphate_____ This molecule makes up the sides of the ladder along with phosphate. 3. __Codon__________ These are a 3-base code for amino acids. 4. __Shape______ You align your chromosomes in a Karyotype according to size and ? 5. __Translation_Name the process in which amino acids are a ...
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... Within the nucleus of every cell are long strings of DNA, the code that holds all the information needed to make and control every cell within a living organism. DNA, which stands for deoxyribonucleic acid, resembles a long, spiraling ladder. It consists of just a few kinds of atoms: carbon, hydroge ...
DNA Structure with Coloring Activity
DNA Structure with Coloring Activity

... The nucleus is a small spherical, dense body in a cell. It is often called the "control center" because it controls all the activities of the cell including cell reproduction, and heredity. Chromosomes are microscopic, threadlike strands composed of the chemical DNA (short for deoxyribonucleic acid) ...
Grade-Level Science Homework Due: Friday, October 7th, 2011
Grade-Level Science Homework Due: Friday, October 7th, 2011

... thousands of genes. Earlier, we said that DNA is like a word constructed of four letters, A, T, C and G. It is better to say that genes are like words, and DNA is a very, very, very long sentence. Just like we shuffle letters to form words and put words together to form sentences, life shuffles the ...
Lesso9 sp2012 (online)
Lesso9 sp2012 (online)

... c. Pauling of Cal Tech fame, shows that biochemists can make discoveries with legos, tinker toys or other model building kits as long as they have a sharp mind and right chemical information about their molecule. d. Two scientists, one a chemist the other a biologist, who were not even hired to work ...
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Mammalian XRCC2 promotes the repair of DNA double

... In cell lines containing SCneo, DSBs introduced into the chromosome by I-SceI could be repaired by HR to restore a neo+ gene. Wild-type cell lines transfected with the I-SceI expression vector pCMV3xnls-I-SceI underwent HR at a frequency of 1±2 3 10 2 3 per plated cell, more than 100-fold higher tha ...
DNA DRY LAB
DNA DRY LAB

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DNA The Double Helix
DNA The Double Helix

... bases that determine which protein is to be made.  The sequence is like a code that we can now interpret.  The sequence determines which proteins are made and the proteins determine which activities will be performed.  And that is how the nucleus is the control center of the cell.  The only problem  ...
DNA These “genes” never go out of style!!
DNA These “genes” never go out of style!!

... Francis Crick and James Watson Were also working on finding the structure of DNA through cardboard models  1953, given Franklin’s X-ray information  Published findings in a historic one-page paper explaining that DNA was a double-helix in which two strands of DNA were wound around each other.  O ...
To use a skit to explain the role of the enzymes in
To use a skit to explain the role of the enzymes in

... DNA should be should be shown starting as a single double-stranded molecule, and turn into two doublestranded molecules. ...
Structure of DNA
Structure of DNA

... • Prokaryotes: DNA molecule is in the cytoplasm, consisting mainly of a single ring of DNA and associated proteins. • Eukaryotic: DNA is linear, and organized into individual chromosomes. – The length of a single chromosome ranges from 51 million – 245 million base pairs. All the DNA in the nucleus ...
Complementary Base Pairs: A and T
Complementary Base Pairs: A and T

... DNA strands, • pairing the bases in each strand with new bases to form new complementary strands, and • producing two new DNA strands that exactly duplicate the original DNA. ...
Ch. 20 Biotechnology
Ch. 20 Biotechnology

... to find your gene you need some of gene’s sequence  if you know sequence of protein…  can guess part of DNA sequence  “back translate” protein to DNA  if you have sequence of similar gene from ...
File
File

... - Cells need to divide in order to reproduce, so what happens to their DNA as they divide? It has already divided and prepared for binary fission/asexual reproduction through DNA replication during the ​S phase​, or DNA ​s​ynthesis phase of its life cycle. - Replication begins at the ​ORI​, or origi ...
12-2 Notes
12-2 Notes

...  DNA molecules are very long  Ex. E. coli’s DNA is 4,639,221 base pairs long (about 1.6 mm)  This DNA must be folded to 1/1000th of its length just to fit inside the bacteria ...
notes File - selu moodle
notes File - selu moodle

... Immediate: all DNA heavy Round one: all DNA medium density (between light and heavy) Round two: half DNA medium density; half DNA light density Explanation: initially all DNA was heavy, after first replication DNA is medium because it has a heavy and a light strand, after second replication half DNA ...
Translation and Transcription and Replication, Oh My!
Translation and Transcription and Replication, Oh My!

... nucleotides pair using hydrogen bonds to form a double strand. Because these two strands are twisted, it is referred to as a double helix. When base pairs are formed, adenine will only pair with thymine and guanine will only pair with cytosine. The mechanism by which DNA creates exact copies of all ...
DNA - The Double Helix - BIOLOGY
DNA - The Double Helix - BIOLOGY

... which in turn codes for a trait. Hence you hear it commonly referred to as the gene for baldness or the gene for blue eyes. Meanwhile, DNA is the chemical that genes and chromosomes are made of. DNA is called a nucleic acid because it was first found in the nucleus. We now know that DNA is also foun ...
Presentation
Presentation

... present in the cell nucleus. These bases are not part of the DNA yet. They join the bases that are on the opened rungs. A –bonds with –T ...
Meiosis notes
Meiosis notes

... ◦ Homologous chromosomes pair up and cross over ▪ Crossing Over • Crossing over is the exchange of genetic material between homologous chromosomes • Homologous chromosomes pair up to form tetrads and exchange pieces of their DNA. ◦ Tetrad: Two homologous chromosomes paired up • This process allows f ...
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Homologous recombination



Homologous recombination is a type of genetic recombination in which nucleotide sequences are exchanged between two similar or identical molecules of DNA. It is most widely used by cells to accurately repair harmful breaks that occur on both strands of DNA, known as double-strand breaks. Homologous recombination also produces new combinations of DNA sequences during meiosis, the process by which eukaryotes make gamete cells, like sperm and egg cells in animals. These new combinations of DNA represent genetic variation in offspring, which in turn enables populations to adapt during the course of evolution. Homologous recombination is also used in horizontal gene transfer to exchange genetic material between different strains and species of bacteria and viruses.Although homologous recombination varies widely among different organisms and cell types, most forms involve the same basic steps. After a double-strand break occurs, sections of DNA around the 5' ends of the break are cut away in a process called resection. In the strand invasion step that follows, an overhanging 3' end of the broken DNA molecule then ""invades"" a similar or identical DNA molecule that is not broken. After strand invasion, the further sequence of events may follow either of two main pathways discussed below (see Models); the DSBR (double-strand break repair) pathway or the SDSA (synthesis-dependent strand annealing) pathway. Homologous recombination that occurs during DNA repair tends to result in non-crossover products, in effect restoring the damaged DNA molecule as it existed before the double-strand break.Homologous recombination is conserved across all three domains of life as well as viruses, suggesting that it is a nearly universal biological mechanism. The discovery of genes for homologous recombination in protists—a diverse group of eukaryotic microorganisms—has been interpreted as evidence that meiosis emerged early in the evolution of eukaryotes. Since their dysfunction has been strongly associated with increased susceptibility to several types of cancer, the proteins that facilitate homologous recombination are topics of active research. Homologous recombination is also used in gene targeting, a technique for introducing genetic changes into target organisms. For their development of this technique, Mario Capecchi, Martin Evans and Oliver Smithies were awarded the 2007 Nobel Prize for Physiology or Medicine.
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