Depending on the species of organism,mitochondrial DNA codes for about 13 proteins;however,these proteins account for only a small proportion of the proteins found in mitochondria.The other proteins are coded for by nuclear DNA.Which of the following helps explain how these proteins find their way to the mitochondria?
A)signal sequences
B)random transport vesicles
C)attachment of ribosomes to outer mitochondrial pores and direct deposition into the inner mitochondrial compartment
D)mRNAs that are manufactured in the nucleus,but translated by mitochondrial ribosomes

Question

Quizplus · Accepted Answer

Signal sequences are short stretches of amino acids that act as guiding signals, directing newly synthesized proteins to their correct cellular location. In the case of mitochondrial proteins, signal sequences at the N-terminus (the end of the protein that is synthesized first) act as mitochondrial targeting signals, guiding the protein to the mitochondria.

Depending on the Species of Organism,mitochondrial DNA Codes for About