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

question 27

Multiple Choice

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

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Definitions:

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A flat, muddy area of land that is covered and uncovered by the sea at high and low tides, respectively.

Clay Particles

The fine-grained mineral components of clay, usually less than 2 micrometers in size, contributing to its unique properties such as plasticity when wet.

Stromatolites

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