Transcription and Translation

Front

What is transcription?

Back

Transcription is the process by which the genetic information in DNA is copied into messenger RNA (mRNA). It occurs in the nucleus of the cell.

Front

What is translation?

Back

Translation is the process by which the sequence of nucleotides in mRNA is used to synthesize a chain of amino acids, forming a protein. This occurs in the ribosome.

Front

What is mRNA?

Back

mRNA (messenger RNA) is a type of RNA that carries the genetic information from DNA to the ribosome, where proteins are synthesized.

Front

What is tRNA?

Back

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

Front

What is a codon?

Back

A codon is a sequence of three nucleotides in mRNA that specifies a particular amino acid or signals the termination of protein synthesis.

Front

What is an anticodon?

Back

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.

Front

What is the role of ribosomes in protein synthesis?

Back

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

Front

What is the difference between DNA and RNA?

Back

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

Front

Where does transcription occur in the cell?

Back

Transcription occurs in the nucleus of the cell.

Front

What is the significance of the start codon?

Back

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