A Transcription Unit That Is 8,000 Nucleotides Long May Use

question 68

Multiple Choice

A transcription unit that is 8,000 nucleotides long may use 1,200 nucleotides to make a protein consisting of approximately 400 amino acids. This is best explained by the fact that

• A) many noncoding stretches of nucleotides are present in mRNA.
• B) there is redundancy and ambiguity in the genetic code.
• C) many nucleotides are needed to code for each amino acid.
• D) nucleotides break off and are lost during the transcription process.
• E) there are termination exons near the beginning of mRNA.