Plant Structure
In plant cells, which of the following is not a function of the large central vacuoles of plant cells?

Storage of food
Support
Contractile regulation of
Waste storage water content

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

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
The outer membrane contains porins

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