How Does RNA Copy DNA Strands?

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In summary, RNA copies DNA strands through transcription using the enzyme RNA polymerase. Its purpose is to create mRNA for protein synthesis. RNA and DNA have different structures and functions, with RNA being single-stranded and involved in protein synthesis. There are three main types of RNA: mRNA, tRNA, and rRNA. Although RNA can make mistakes when copying DNA, the cell has mechanisms to correct them.
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clouded.perception
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How does RNA "know" which DNA strand is the template strand?
 
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Are you asking about introns and exons? Or the "stop" codon? Or something else?
 
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clouded.perception said:
How does RNA "know" which DNA strand is the template strand?

It's the DNA-directed RNA polymerase that has to "know" which strand is the template, and that is determined by the binding of transcription factors that help the polymerase attach to the site where transcription will start.
 

1. How does RNA copy DNA strands?

RNA copies DNA strands through a process called transcription. This involves an enzyme called RNA polymerase that binds to the DNA and reads the genetic code to create a complementary RNA strand.

2. What is the purpose of RNA copying DNA?

The purpose of RNA copying DNA is to create a messenger RNA (mRNA) molecule that can carry the genetic code from the DNA to the ribosomes, where it is used to make proteins.

3. What is the difference between RNA and DNA?

RNA and DNA are both nucleic acids and contain genetic information, but they have different structures and functions. DNA is a double-stranded molecule, while RNA is a single-stranded molecule. DNA stores the genetic code, while RNA helps to carry and translate the code into proteins.

4. Are there different types of RNA?

Yes, there are three main types of RNA: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). Each type has a specific role in the process of protein synthesis.

5. Can RNA make mistakes when copying DNA?

Yes, RNA can make mistakes when copying DNA, just like DNA can make mistakes when replicating itself. However, the cell has mechanisms in place to correct these mistakes and ensure the accuracy of the genetic code.

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