Download - Transcription
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Transcription
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Define the following
Messenger RNA Ribosomal RNA Transfer RNA Transcription Codon
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Morse Code
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Genes and Proteins
Read on pg. 294 what role proteins play
How does DNA factor in?
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RNA 3 chemical differences between DNA
and RNA 1. Single strand 2. Sugar in RNA is ribose 3. Uracil (U) instead of thymine (T) “U R single”
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Three types of RNA
Messenger RNA (mRNA)
Ribosomal RNA (rRNA)
Transfer RNA (tRNA)
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Messenger RNA (mRNA)
RNA that transports information from DNA in the nucleus to the cell's cytoplasm
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Ribosomal RNA (rRNA)
RNA that makes up the ribosomes; Clamps onto mRNA and Uses it’s information to assemble
amino acids in the correct order
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Transfer RNA (tRNA)
RNA that transports amino acids to the ribosomes to be assembled into proteins
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Transcription
Process in the cell nucleus where enzymes make an RNA copy of a DNA strand
1. Enzymes unzip the molecule of DNA 2. RNA nucleotides pair with
complementary DNA nucleotides on a DNA strand
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Transcription cont…
AGC TAA CCG
UCG AUU GGC
GACAAGTCCACAATC
CUGUUCAGGUGUUAG
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Transcription cont…
3. mRNA molecule breaks away as the DNA strands rejoin
mRNA leaves the nucleus and enters the cytoplasm
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Amino Acids
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The Genetic Code
4 nitrogen bases make up 20 amino acids (64 combos)
This is the genetic code Separated into codons Set of three nitrogen bases that
codes for an amino acid