A signal sequence is a short sequence of amino acids at the beginning of a protein that directs it to a particular part of the cell, such as the endoplasmic reticulum or mitochondria. It does not direct RNA nucleotides or attract tRNAs. It is also not a coding codon.

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A Signal Sequence

Question 51

Multiple Choice

A signal sequence

A) directs RNA nucleotides to a particular gene.
B) attracts tRNAs to an mRNA.
C) is the first part of a protein's amino acid sequence that helps to direct it to a certain part of the cell.
D) is a coding codon that mutates into a stop codon.

Correct Answer: