Transcription and Translation

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What is transcription?

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Transcription is the process of copying a segment of DNA into RNA, specifically mRNA, which carries the genetic information from the nucleus to the ribosome for protein synthesis.

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What is translation?

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Translation is the process by which ribosomes synthesize proteins using the information carried by mRNA, translating the sequence of nucleotides into a sequence of amino acids.

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What is a polypeptide chain?

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A polypeptide chain is a series of amino acids linked together by peptide bonds, which folds into a functional protein.

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What is mRNA?

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mRNA (messenger RNA) is a type of RNA that carries genetic information from DNA to the ribosome, where it serves as a template for protein synthesis.

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What is tRNA?

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tRNA (transfer RNA) is a type of RNA that transports amino acids to the ribosome during protein synthesis, matching them to the coded mRNA sequence.

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What is a codon?

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A codon is a sequence of three nucleotides in mRNA that specifies a particular amino acid or a stop signal during protein synthesis.

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What is an anticodon?

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An anticodon is a sequence of three nucleotides in tRNA that is complementary to a codon in mRNA, allowing for the correct amino acid to be added during translation.

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What is the role of ribosomes in protein synthesis?

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Ribosomes are the cellular structures where translation occurs, facilitating the assembly of amino acids into polypeptide chains based on the sequence of codons in mRNA.

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What is the difference between DNA and RNA?

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One key difference is that RNA contains the base uracil (U) instead of thymine (T), which is found in DNA.

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What is the significance of the start codon?

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The start codon (AUG) signals the beginning of translation and codes for the amino acid methionine, marking the start of protein synthesis.