What is the significance of degeneracy in the genetic code?

Prepare for Molecular and Cellular Biology Exam with engaging quizzes. Master key concepts with flashcards and multiple choice questions, featuring detailed explanations and hints. Ace your exam with confidence!

Multiple Choice

What is the significance of degeneracy in the genetic code?

Degeneracy in the genetic code means that multiple codons can specify the same amino acid. This redundancy allows many single-nucleotide changes to be neutral, producing a synonymous mutation that leaves the amino acid sequence unchanged. In other words, the protein can remain the same even if the DNA sequence varies a little, which provides genetic robustness against random mutations. Of course, some substitutions will still alter the amino acid or create a stop, but the overall effect is that mutation effects are buffered by this redundancy. This is the essence of why having multiple codons per amino acid matters.

Degeneracy in the genetic code means that multiple codons can specify the same amino acid. This redundancy allows many single-nucleotide changes to be neutral, producing a synonymous mutation that leaves the amino acid sequence unchanged. In other words, the protein can remain the same even if the DNA sequence varies a little, which provides genetic robustness against random mutations. Of course, some substitutions will still alter the amino acid or create a stop, but the overall effect is that mutation effects are buffered by this redundancy. This is the essence of why having multiple codons per amino acid matters.

More practice questions