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

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

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Plant Structure
Cellular metabolism is an example of

a series of reactions that defy the second law of thermodynamics
equilibrium metabolism
steady-state metabolism
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
Why do some redox reactions in cells result in the transfer of electrons from a reductant with a higher standard redox potential to an oxidant with a lower standard redox potential?

None of these
The rules governing oxidation and reduction apply only in vitro, and not in vivo
Redox potentials are defined under standard conditions, and cellular conditions are typically not standard conditions
Electrons always go from reductants with high redox potentials to oxidants with low redox potentials

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