SAT II Biology E : RNA Structure and Function

Study concepts, example questions & explanations for SAT II Biology E

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Example Questions

Example Question #41 : Molecular Biology

In RNA, three nucleotide bases together determine the amino acid that is added to the growing polypeptide chain during translation. This three base grouping is known as a(n) __________.

Possible Answers:

promoter

operator

polypeptide

gene

codon

Correct answer:

codon

Explanation:

The three base grouping in RNA that determines the amino acid created in translation is known as a codon. Gene refers to the region on DNA that codes for a given trait. Operators and promoters are also located on DNA, and act as regulatory elements.

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