Which of the following takes place during translation?
- the conversion of genetic information from an mRNA strand to amino acids
- the conversion of genetic information from DNA nucleotides into RNA nucleotides
- replication of DNA
- the conversion of genetic information from amino acids to RNA nucleotides
The correct answer and explanation is :
The correct answer is 1. the conversion of genetic information from an mRNA strand to amino acids.
Explanation:
Translation is the second step in the process of gene expression, following transcription, where an mRNA strand is used to synthesize a protein. During translation, the genetic information that is encoded in mRNA is translated into a specific sequence of amino acids, ultimately forming a protein. This process takes place in the cytoplasm at the ribosome.
- Conversion of genetic information from mRNA to amino acids:
- Translation begins when mRNA, which carries the genetic code from DNA, binds to a ribosome. The ribosome “reads” the mRNA sequence in sets of three nucleotides called codons, each of which specifies a particular amino acid.
- Transfer RNA (tRNA) molecules, which have anticodons complementary to the mRNA codons, bring the appropriate amino acids to the ribosome. As the ribosome moves along the mRNA strand, the tRNA molecules deliver amino acids, and these amino acids are linked together by peptide bonds to form a polypeptide chain, which eventually folds into a functional protein.
- The conversion of genetic information from DNA nucleotides into RNA nucleotides:
- This process refers to transcription, not translation. Transcription occurs before translation, where a segment of DNA is used as a template to synthesize RNA.
- Replication of DNA:
- DNA replication occurs during the cell cycle to ensure that each daughter cell receives an identical copy of the DNA. It is not part of translation.
- The conversion of genetic information from amino acids to RNA nucleotides:
- This statement is incorrect. The process of translation involves converting mRNA codons into amino acids, not the reverse.
In summary, translation involves the synthesis of proteins by decoding the genetic information carried by mRNA into a specific sequence of amino acids. This process is fundamental to cellular function and the expression of genetic traits.