Question

which of the following is a mutagen? a uv light b smoking c x rays d excessive drinking alcohol e all of the above. question 26 the building block for proteins are a nucleotides b codons c amino acids d monosaccharides question 27 the first codon in every mrna is a aug. b uac.

Explanation:

• For the first question, UV light, smoking, X - rays, and excessive alcohol drinking can all cause mutations, so they are mutagens.
• For the second question, amino acids are the building blocks of proteins. Nucleotides are for nucleic acids, codons are triplets of nucleotides in mRNA, and monosaccharides are building blocks of carbohydrates.
• For the third question, the start codon in every mRNA is AUG, which codes for methionine and initiates translation.

Answer:

E. All of the above.
C. amino acids
A. AUG