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DNA -> RNA -> Proteins. The basic language of all living things. A Gene. A gene is a section of DNA that codes for a specific protein Only a very small percentage of our DNA (perhaps 1%) actually does this. RNA - ribonucleic acid. RNA is short compared to DNA

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Dna rna proteins

DNA -> RNA -> Proteins

The basic language of all living things.


A gene
A Gene

  • A gene is a section of DNA that codes for a specific protein

  • Only a very small percentage of our DNA (perhaps 1%) actually does this


Rna ribonucleic acid
RNA - ribonucleic acid

  • RNA is short compared to DNA

  • RNA has one strand instead of two

  • C, G, A, and U (uracil) instead of C,G,A, and T

  • (U takes the place of T)


Messenger rna
Messenger RNA

  • DNA is a large and bulky molecules, it does not travel well, so when it wants to make a protein it makes and mRNA copy of the instructions


Transcription
Transcription

  • This process is called transcription, because the DNA transcribes “copies” itself

  • It takes advantage of base pairing


Rna polymerase
RNA Polymerase

  • An enzyme called RNA Polymerase makes all of this happen

  • The enzyme puts the new nucleotides in place


Mrna finds a ribosome
mRNA finds a ribosome

  • mRNA moves out of the nucleus into the cytoplasm of the cell where it finds a ribosome

  • The ribosome is made of RNA and it will serve as a work bench for making proteins


Translation
Translation

  • Once attached to the ribosome, the mRNA is translated from the language of nucleic acids to the language of amino acids

  • Each three letter word or “codon” calls for one amino acids


tRNA

  • It is the job of the transfer RNA is to transfer the correct amino acid to the correct mRNA codon


Polypeptide chain
Polypeptide chain

  • In this way a polypeptide is made

  • Each time a a tRNA connects to a mRNA one amino acid is added to the growing chain


Summary
Summary

  • Can you label all of the parts in this diagram?

  • A_________

  • B_________

  • C_________

  • D_________

  • E_________

DNA

mRNA

Amino Acid

tRNA

Ribosome


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