Understanding tRNA and Ribosome Function in Protein Synthesis
This chapter explores the roles of transfer RNA (tRNA) and ribosomes in the process of protein synthesis. Each tRNA molecule has an anticodon that pairs with an mRNA codon, carrying a specific amino acid. The bonding ensures the proper amino acid sequence is formed during translation. The chapter also discusses the ribosome's structure, consisting of two subunits made of rRNA and proteins, which unite only during translation. Additionally, it touches upon the wobble effect that allows flexibility in base pairing.
Understanding tRNA and Ribosome Function in Protein Synthesis
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Presentation Transcript
Chapter 14.3 The Other RNA’s AP Biology Fall 2010
tRNA • Each kind of tRNA has an anticodon that is complementary to an mRNA codon • Each tRNA also carries one specific amino acid
tRNA • After the mRNA arrives in the cytoplasm, an anticodon on a tRNA bonds to the codon on the mRNA • Thus a correct amino acid is brought into place
tRNA • The first two bases of the anticodon must pair up with the codon by the usual rules of base pairing (A with U and G with C) • There is some latitude in the pairing in the thrid base • Called the wobble effect
Ribosome • A ribosome has two subunits • Each composed of rRNA and structural proteins • Two subunits come together only during translation
Ribosome • Ribosomes are built in the nucleus • Small and large subunits come together during translation
