Plant Structure
Cellular metabolism is an example of

steady-state metabolism
equilibrium metabolism
a series of reactions that defy the second law of thermodynamics
a series of reactions occurring under standard conditions

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Plant Structure
The mitochondria were known in the nineteenth century to be osmotically active on the basis of evidence that

mitochondria were derived from a symbiotic bacterium
the mitochondrial matrix is hypotonic to the cellular cytoplasm
mitochondria are surrounded by a semi permeable membrane
the mitochondrial matrix is hypertonic to the cellular cytoplasm

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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 contains porins
The outer membrane is highly permeable to substances of small molecular weight
The outer membrane is impermeable to hydrogen ions

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