BiOchem lab DNA electrophoresis

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In summary, the conversation discusses the use of restriction endonucleases in prokaryotes and how they protect their DNA, the importance of using purified DNA samples in restriction digest and gel electrophoresis, and the reason for using restriction enzymes and gel electrophoresis in molecular biology. The individual posting the question expresses frustration and states they have since found the answers on their own.
  • #1
solijigar
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[SOLVED] BiOchem lab DNA electrophoresis

1) what is the the purpose of restriction endonucleases in prokaryotes? how do these organisms protect their DNA against the effects of their own restriction enzyme?


2)why is it important to use purified Dna samplesin restriction digest and gel electrophoresis? Rather then just using homogenized tissue?


3) why we use restriction enzyme and gel electophoresis in molecular biology?
 
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  • #2
Have you tried to Google this. I'm sure you can find it on Wikipedia.
 
  • #3
The answers to these sorts of questions really should just be in your textbook or lecture notes. Once you've found them, if there's something you need explained further or clarified, post the answer you get and your more specific question about it, and we can then help.
 
  • #4
well thanks any way I already have found the answer.I were just streesd out and weren't able to focus...
 

1. What is the purpose of DNA electrophoresis in a biochemistry lab?

DNA electrophoresis is a technique used to separate and analyze DNA molecules based on their size and charge. This allows researchers to study the genetic information of an organism, identify DNA mutations, and compare DNA samples from different sources.

2. How does DNA electrophoresis work?

In DNA electrophoresis, an electric field is used to move DNA molecules through a gel matrix. Since DNA is negatively charged, it will move towards the positive electrode. The smaller DNA molecules will move faster and travel further through the gel, while larger molecules will move slower and stay closer to the origin.

3. What types of DNA samples can be analyzed using electrophoresis?

DNA electrophoresis can be used to analyze various types of DNA samples, including genomic DNA, plasmid DNA, PCR products, and DNA fragments obtained through restriction enzyme digestion. It can also be used to analyze RNA samples after being converted to cDNA.

4. What are the key components needed for DNA electrophoresis?

The key components needed for DNA electrophoresis include a gel matrix (usually agarose or polyacrylamide), a buffer solution to maintain the pH and conductivity, a power supply to create an electric field, and DNA samples that have been treated with a loading dye to make them visible during the electrophoresis process.

5. What are some common applications of DNA electrophoresis in biochemistry research?

DNA electrophoresis is commonly used in biochemistry research for DNA fingerprinting, genetic testing, gene mapping, and studying DNA mutations. It is also used in the field of forensics to identify suspects in criminal investigations. In addition, it is a crucial technique in molecular biology and biotechnology for cloning and analyzing recombinant DNA molecules.

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