Photosynthesis Test Flashcards
mass cannot be created nor destroyed. it can only change forms
law of conservation of mass
light is used to make plant tissues
photosynthesis
stored energy
potential energy
energy in motion
kinetic energy
light we can detect with our eyes
visible light
has a shorter wavelength than visible light and is able to penetrate human tissue
ultra violent
(heat) has longer wavelengths than visible light
infrared
first photosynthetic cells
cyanobacteria
first part of photosynthesis; only occurs when light is available
light-dependent reactions
generates glucose
light-independent reactions
tiny pores in leaves
stomata
carbon sugar
G3P
enzyme that attaches the molecule of carbon dioxide to the 5-carbon molecule RuBP
Rubisco
oxygen is added to the calvin cycle instead of carbon dioxide
photorespiration
specialized storage organelles that produce and store starch
amyloplast
true or false: In photosystem II, a photon strikes an arrangement of chlorophyll causing the excitement of electrons and splitting of water
true
true or false: In photosystem I, the electron is re-energized by another photon and used to generate an electron carrier called NADPH
true
the primary location of photosynthesis is _________, which contain the organelle __________, each of which is filled with the green pigment _________.
leaves, chloroplast, chlorophyll
list the primary constituents of air
- 78 nitrogen
- 21 oxygen
- .9 argon
- .03 carbon dioxide
- .02 water
for a long time, the conventional wisdom was that plants gained most of their mass by “eating” or absorbing nutrients from soil. In reality, where does most of their mass come from?
in reality, plants need water and sunlight.
what is the kinetic energy that plants utilize in photosynthesis? what form of potential energy are they producing?
kinetic- release of carbon dioxide
potential- stored glucose
what specific wavelengths of energy are utilized by plants in photosynthesis
infrared
write out the complete reaction for photosynthesis. which reactant molecules provide the atoms of carbon, hydrogen, oxygen needed to synthesize glucose.
carbon dioxide and water are used to synthesize glucose, which are then to be used to produce starch or cellulose
why is the enzymw rubisco called “the bridge of life”? what exactly does it do
Carbon dioxide is considered a lifeless molecule, but RuBP is organic and part of the plants cellular processes
which pigments of visible light do plants absorb and use for photosynthesis? which are reflected
absorbed- all colors but green
reflected- green
what conditions lead to photorespiration. why is it xonsidered a wasteful process for plants
dehydration leads to photorespiration.
no ATP or sugar is produced by this process, while a lot of the carbon compounds in the plants are consumed
compare how C4 and CAM plants are adapted to minimize the costs of photorespiration.
C4 plants minimize the costs by moving the carbon fixation process to mesophyll
CAM plants minimize the costs by only opening their stomata at night when the air is cooler
photo meaning light
auto meaning self
troph meaning nutrition
photoautotroph
