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

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

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Plant Structure
Which of the following experimental results does not support Mitchell's chemiosmosis theory?

An artificial proton gradient across the inner mitochondrial membrane drives ATP synthesis in the absence of electron transport
Addition of dinitrophenol to isolated mitochondria was shown to inhibit electron transport, but had no effect on ATP synthesis
Addition of dinitrophenol to isolated mitochondria during electron transport was shown to inhibit acidification of the medium
Electron transport in isolated mitochondria was shown to result in acidification of the medium

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Plant Structure
Any system that is not at equilibrium

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

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Plant Structure
Which is not true about a photon?

It donates electron to reduce carbon dioxide to glucose
The shorter the wavelength, the greater the energy of the photons
It is trapped by photosynthetic unit
It is a packet of light energy

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