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Gene Expression and Protein Synthesis
This deck covers key concepts in gene expression, protein synthesis, and bioinformatics, focusing on ribosome function, tRNA, translation stages, and mutations.
What is the role of ribosomes in protein synthesis?
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Key Terms
Term
Definition
What is the role of ribosomes in protein synthesis?
Ribosomes facilitate the specific coupling of tRNA anticodons with mRNA codons during protein synthesis.
What are the components of ribosomal subunits?
Ribosomal subunits are constructed of proteins and RNA molecules named ribosomal RNA or rRNA.
What are the three binding sites on a ribosome for tRNA?
The three binding sites are the P site (peptidyl-tRNA binding site), the A site (aminoacyl-tRNA binding site), and the E site (exit site).
What is the function of aminoacyl-tRNA synthetase?
Aminoacyl-tRNA synthetase joins each amino acid to the correct tRNA, forming an 'activated amino acid'.
Describe the 'wobble' phenomenon in tRNA translation.
Wobble allows tRNA to translate more than one codon for the same amino acid, with flexibility at the third codon position.
What are the stages of translation in protein synthesis?
Translation occurs in three stages: initiation, elongation, and termination.
Related Flashcard Decks
| Term | Definition |
|---|---|
What is the role of ribosomes in protein synthesis? | Ribosomes facilitate the specific coupling of tRNA anticodons with mRNA codons during protein synthesis. |
What are the components of ribosomal subunits? | Ribosomal subunits are constructed of proteins and RNA molecules named ribosomal RNA or rRNA. |
What are the three binding sites on a ribosome for tRNA? | The three binding sites are the P site (peptidyl-tRNA binding site), the A site (aminoacyl-tRNA binding site), and the E site (exit site). |
What is the function of aminoacyl-tRNA synthetase? | Aminoacyl-tRNA synthetase joins each amino acid to the correct tRNA, forming an 'activated amino acid'. |
Describe the 'wobble' phenomenon in tRNA translation. | Wobble allows tRNA to translate more than one codon for the same amino acid, with flexibility at the third codon position. |
What are the stages of translation in protein synthesis? | Translation occurs in three stages: initiation, elongation, and termination. |
What happens during the initiation stage of translation? | During initiation, mRNA, tRNA bearing the first amino acid, and ribosomal subunits come together to form the initiation complex. |
How does elongation occur in translation? | During elongation, amino acids are added one by one to the growing polypeptide chain, using energy from ATP and GTP. |
What triggers termination in translation? | Termination occurs when the ribosome reaches a stop codon, and a release factor binds, causing the complex to disassemble. |
What are point mutations and their potential effects? | Point mutations involve changes to a single nucleotide and can affect protein structure and function, potentially causing genetic diseases. |