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Section 11.2 mp

Chapter 11 Test

QuestionAnswer
Step 1 of Transcription the process of transcription begins as enzymes unzip the molecule of DNA in the region of the gene to be transcribed
Step 2 of Transcription Free RNA nucleotides form base pairs with their complementary nucleotides on the DNA strand. The mRNA strand is complete when the RNA nucleotides bond together.
Step 3 of Transcription The mRNA strand breaks away, and the DNA strands rejoin. The mRNA strand leaves the nucleus and enters the cytoplasm.
Step 1 of Translation As translation begins, a ribosome attaches to the mRNA strand. Molecules of tRNA, each carrying a specific amino acid, approach the ribosome.
Step 2 of Translation The codon AUG, which codes for the amino acid methionine signals the start of protein synthesis. The tRNA molecule carrying methionine attaches to the ribosome and mRNA strand.
Step 3 of Translation A new tRNA molecule carrying an amino acid attaches to the ribosome and mRNA strand next to the previous tRNA molecule. The amino acids on the tRNA molecules join by peptide bonds
Step 4 of Translation After the peptide bond if formed, the ribosome slides along the mRNA to the next codon. The tRNA molecule no longer carrying an amino acid is released. A new tRNA molecule carrying an amino acid can attach to the ribosome and mRNA strand
Step 5 of Translation A chain of amino acids is formed until a stop codon is reached on the mRNA strand
Created by: mpiontek
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