During the translation of mRNA molecules, the new polypeptides are often directed to specific parts of the cell by the presence or absence of short sequences of amino acids called signal peptides. Which of the following would you expect to find in the polypeptides that will eventually fold to become enzymes important in photosynthesis, such as NADP⁺ reductase?

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Enzymes important in photosynthesis, such as NADP reductase, are typically located in the chloroplast. To direct these newly synthesized polypeptides to the chloroplast, they often contain an amino terminal signal peptide. This signal peptide guides the polypeptide to the chloroplast where it is then imported and the signal peptide is cleaved off.

During the Translation of MRNA Molecules, the New Polypeptides Are