Plant Structure
Which is not true about a photon?

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

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Plant Structure
Which of the following observations is not used as evidence to support the concept of endosymbiotic origin of chloroplasts and mitochondria?

Both strongly resemble prokaryotes, especially in size
Both have their own DNA
Both can live and function independently of the cell
Both have their own ribosomes

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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?

Electrons always go from reductants with high redox potentials to oxidants with low redox potentials
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

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Plant Structure
Any system that is not at equilibrium

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

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