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

Contractile regulation of
Waste storage water content
Support
Storage of food

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Plant Structure
Any system that is not at equilibrium

is thermodynamically unstable, although it may be kinetically stable
requires an enzyme to reach equilibrium
is rushing toward equilibrium at a very rapid rate
is kinetically unstable, although it may be thermodynamically stable

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

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

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

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

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