Question

multiple-choice question
methionine is also the ______ codon.
start
stop
last
middle

Explanation:

In molecular biology (a subfield of Biology, which is under Natural Science), the codon AUG codes for Methionine and also serves as the start codon that initiates protein synthesis. The other options (stop, last, middle) do not fit: stop codons are UAA, UAG, UGA; "last" and "middle" are not standard terms for codon function related to Methionine.

Answer:

A. start