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Question:

layn
layn
Student
High School - 12th Grade

Why is RNA important to the cell? How does an mRNA molecule carry information DNA? Where does the mRNA molecule take the information?

pl i need this answers

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Posted by layn on Wednesday October 29, 2008 at 5:58 PM and tagged with cells, importance, rna, science.

Answers:

  1. cburr
    cburr Teacher
    Middle School

    eNotes Editor

    There are 3 types of RNA that enable a cell to use the instructions in the DNA -- which is in the nucleus -- to make enzymes.

    The mRNA (messenger RNA) copies the DNA and then floats out into the cytoplasm of the cell to a ribosome. There two other types of RNA come into play. rRNA (ribosomal RNA) uses the instructions in the mRNA to connect amino acids carried by the 20 types of tRNA (transfer RNA). The result is a chain of amino acids that forms an enzyme.

    Sources:
    http://www.enotes.com/microbiology-encyclopedia/ribonucle...

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    Posted by cburr on Wednesday October 29, 2008 at 7:47 PM

  2. mathexpert
    mathexpert Student
    College - Junior

    RNA serves as the internmediate between DNA and the protein to be synthesized.

    Messenger RNAs (mRNAs) are the nucleic acids that "record" information from DNA in the nucleus of the cell. They carry this copied information to the ribosomes and are known as messenger RNAs (mRNA).

    In case of expressing the characters, RNA is more powerful then DNA since they directly code for the proteins to be synthesized. DNA has to be always dependent on RNA for its transmission of genetic characters.

    Source: http://www.examville.com 

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    Posted by mathexpert on Thursday October 30, 2008 at 5:08 AM