Just a summary of the role of DNA and RNA in the transcription/translation process would be find with me. thank u
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More simply put:
DNA provides the template to be copied.
RNA is the machine that does the copying and is intermediate between DNA and Protein.
The protein does the work.
DNA ---> RNA --> Protein.
mmiller@forensicdnaexperts.com
www.forensicdnaexperts.com
DNA provides the template to be copied.
RNA is the machine that does the copying and is intermediate between DNA and Protein.
The protein does the work.
DNA ---> RNA --> Protein.
mmiller@forensicdnaexperts.com
www.forensicdnaexperts.com
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DNA is the genetic material that is transmitted from parent to offspring. It contains the information necessary to direct protein synthesis. During transcription, the double stranded DNA is separated, and one of the DNA strands (the strand that contains the promotor sequence) is used as a template for the synthesis of RNA. There are three RNA molecules that function during the process of gene expression:
1) mRNA (messenger RNA) - through mRNA, the information coded within DNA is copied, or transcribed. Because DNA does not exit the nucleus, mRNA carries this information from the nucleus into the cytoplasm, where it makes contact with a ribosome, the site of protein synthesis (translation). It should be noted that in eukaryotes, before mRNA exits the nucleus, it undergoes a process referred to as RNA splicing, in which noncoding regions (introns) are removed and coding regions (exons) are spliced together. Once this is accomplished, it exits the nucleus as mature mRNA.
2) tRNA (transfer RNA) - tRNA primarily functions in translation. Each tRNA molecule contains an anticodon on one end, which recognizes its complementary codon on the mRNA molecule. On the opposite end of tRNA is the amino acid that the codon specifies, which is incorporated into the growing polypeptide chain.
3) rRNA (ribosomal RNA) - ribosomal RNA (in addition to proteins) are constituents of the ribosomal subunits. This is actually the most abundant type of RNA. In both prokaryotes and eukaryotes, large and small ribosomal subunits join to form a functional ribosome. Each ribosome contains a P (peptidyl-tRNA) site, A (aminoacyl-tRNA) site, and an E (exit) site.
I hope this helps! I tried to remember as much as I can!
1) mRNA (messenger RNA) - through mRNA, the information coded within DNA is copied, or transcribed. Because DNA does not exit the nucleus, mRNA carries this information from the nucleus into the cytoplasm, where it makes contact with a ribosome, the site of protein synthesis (translation). It should be noted that in eukaryotes, before mRNA exits the nucleus, it undergoes a process referred to as RNA splicing, in which noncoding regions (introns) are removed and coding regions (exons) are spliced together. Once this is accomplished, it exits the nucleus as mature mRNA.
2) tRNA (transfer RNA) - tRNA primarily functions in translation. Each tRNA molecule contains an anticodon on one end, which recognizes its complementary codon on the mRNA molecule. On the opposite end of tRNA is the amino acid that the codon specifies, which is incorporated into the growing polypeptide chain.
3) rRNA (ribosomal RNA) - ribosomal RNA (in addition to proteins) are constituents of the ribosomal subunits. This is actually the most abundant type of RNA. In both prokaryotes and eukaryotes, large and small ribosomal subunits join to form a functional ribosome. Each ribosome contains a P (peptidyl-tRNA) site, A (aminoacyl-tRNA) site, and an E (exit) site.
I hope this helps! I tried to remember as much as I can!