Plant Structure
Which of the following statements about the outer mitochondrial membrane is not true?

The outer membrane contains porins
The outer membrane is impermeable to hydrogen ions
The outer membrane is about 50% lipid and 50% protein by weight
The outer membrane is highly permeable to substances of small molecular weight

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Plant Structure
Which of the following statements about mitochondrial proteins is true?

Mitochondrial proteins arise from other mitochondrial proteins
All mitochondrial proteins are coded for and synthesized in the mitochondria
All mitochondrial proteins are imported from the cytoplasm
Some mitochondrial proteins are coded for and synthesized in the mitochondria and others

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