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RNA and Protein Synthesis
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I. RNA Formed from nucleotides Single stranded
Uracil instead of thymine Sugar Ribose Copies the DNA info for protein synthesis
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3 Types of RNA: rRNA (ribosomal): help make up ribosome
mRNA (messenger): carries the DNA info from nucleus to ribosome tRNA (transfer): brings amino acids to ribosomes to build proteins
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RNA vs DNA
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http://images. encarta. msn
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II. Protein Synthesis A. Transcription:
The DNA code is transcribed (copied) into mRNA in the nucleus
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B. mRNA moves into the cytoplasm, attaching to a ribosome
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Translation: Each codon of mRNA selects a tRNA with a specific amino acid
Ribosome reads the mRNA and joins amino acids to form a protein (polypeptide chain)
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E. After delivering its amino acid, tRNA picks up another amino acid
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From Gene to Protein
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A Review of Protein Synthesis
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