Photosynthesis 1 Flashcards
Describes the process by which Photosynthetic organisms photoautotrophs, synthesize organic compounds from inorganic raw materials using light
photosynthesis
is the means for solar energy to enter into the global ecosystem, and it alone is the essential biological process by which solar energy is transformed into metabolic form of energy for all forms of life on earth
photosynthesis
has characteristics of both a particle and a wave
light
is characterized by a wavelength
wave
light is also a particle, which we call a
photon
Each photon contains an amount of energy that is called a
quantum (plural quanta)
a yellow pigment
xanthophyll
a gray–brown pigment
Phaeophytin a
a yellow–brown pigment
Phaeophytin b
All electromagnetic radiation is light, but we can only see a small portion of this radiation–
visible light
The reason that there are so many pigments
each absorbs light more efficiently in a different part of the electromagnetic spectrum
As objects grow _______, they radiate energy dominated by ________wavelengths
hotter, shorter
Magnesium absorbs a
wavelength of _______nm and emits
a color of?
285.2; UV (Ultraviolet)
For the two photosystems I & II, _______________ exist
to assist the photosynthetic process by absorbing specific
spectra of light energy.
chlorophylls a & b
absorbs the violet
blue - blue wavelengths of light (390-450nm with peak at
420nm) and orange to far-red (600-700nm with a peak at
680nm)
chlorophyll a
however absorbs violet blue to
green blue light (390-500nm with a peak at 480nm) and
yellow to red light (600nm-680nm with a peak at 630nm)
Chlorophyll b
Plants still use the _______________ spectra as there
exist photopigments that turn green or yellow photons
(500-600nm wavelengths) into _______________
through excitation and emittance reactions
green and yellow
blue and red
-is usually referred to as radiation with wavelengths between 400 and 500 nm
-less efficient than green or red photons because their high energy isn’t fully utilized
blue light