Imagine a segment of DNA (within a gene) encoding a certain amount of information in its nucleotide sequence. When this segment is fully transcribed into mRNA and then translated into protein, in general, …
A) the protein sequence would carry more information compared to the DNA and mRNA sequences, because its alphabet has 20 letters.
B) the protein sequence would carry less information compared to the DNA and mRNA sequences, because several codons can correspond to one amino acid.
C) the amount of information in the mRNA sequence is lower, because the mRNA has been transcribed using only one of the DNA strands as the template.
D) the amount of information in the mRNA sequence is higher, because several mRNA molecules can be transcribed from one DNA molecule.

Question

Quizplus · Accepted Answer

There are 64 (that is, 4³) nucleotide triplets or codons using four types of nucleotide monomers, whereas each codon encodes one out of only 20 amino acids. Therefore, some sequence information is lost when translating from mRNA to protein sequences, such that it is not usually possible to deduce the original mRNA sequence given a translated polypeptide sequence.

Imagine a Segment of DNA (Within a Gene) Encoding a Certain