Mitochondrial DNA codes for about 13 proteins depending on the species of organism). These 13 proteins account for a small proportion of the proteins present in mitochondria. The remaining proteins are coded for by nuclear DNA. What is the most likely explanation for how these proteins find their way to the mitochondria?
A) random transport vesicles
B) signal sequences
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

The most likely explanation for how nuclear-encoded proteins find their way to the mitochondria is through the presence of signal sequences. These sequences act as a signal for the protein to be transported to the mitochondria and direct it to the correct location within the organelle.

Mitochondrial DNA Codes for About 13 Proteins Depending on the Species