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45 terms

Biology JEH- Chapter 7

STUDY
PLAY
The Calvin cycle must turn 6 times in order for what to happen?
it to produce one molecule of glucose
The shorter the wavelength of visible light
the greater the energy
The first cells to release oxygen into the atmosphere were what?
Cyanobacteria
Photosynthesis take place where?
In the cholorplast
Green contributes the least energy to
photosynthesis
The light reactions of photosynthesis convert solar energy into
Chemical energy
The last stage of one complete turn of the Calvin cycle involves
regeneration of RuBP
The products of the light reactions of photosynthesis are
ATP and NADPH
Cutting down trees does what to the atmosphere?
increases the amount of CO2 released into the air
Grana are stacks of what?
membranous sacs
Photosystems are located where?
In the thylakoid membrane
What are responsible for the yellow-orange coloration of leaves in the fall?
Caratenoids
What is a stomatas function?
Gas exchange
What is this reaction? 6CO2 + 6H2O -> C6H12O6 + 6H2O
Photosynthesis
In photosynthesis...
An H+ ion gradient forms across the thyroid membrane
What is the source of the oxygen gas released by a photosystem?
Water
What is the source of electrons for the light reactions?
water
How do plants obtain most of their water?
through their roots
What happens when a molecule absorbs a proton?
one of its electrons is raised to the excited state
The electron transport chain of cellular respiration ....
is analogous tot he light reactions of photosynthesis
The primary mechanism by which CO2 contributes to global warming is ?
by preventing the radiation of heat from earth to space.
Molecules release energy gained by absorption of a photon by:
Flourenscence
loss of an electron
light
heat
The Calvin Cycle makes direct us eof CO2 to make
ATP
NADPH
sugar
NADP+ is to photosynthesis as NAD+ is to
cellular respiration
The first step of the calvin cycle is
incorporation of CO2 into RuBP
The energy of wavelengths that appear green are least useful to
photosynthesis
Plant cells that contain the organelle responsible for photosynthesis are concentrated in the cells of
Mesophyll
The ultimate source of nearly all energy in the food produced on earth is
Sunlight
A concentration gradient is
a form of potential energy
The light reaction of photosynthesis take place in
the thylakoid membrane
How many molecules of glucose are produced by each cycle of the light reaction?
...
C4 plants conserve water by doing what?
Keeping their stomata closed most of the time
Mushrooms are what?
heterotrophs
CAM plants conserve water by doing what?
Keeping their stomata closed at night
An oxidation reduction reaction involves
the transfer of an electron
Under arid conditions C4 plants fix carbon dioxide more efficiently than C3 plants because why?
C4 plants use ATP to fix carbon dioxide
One of the compounds that is the direct output of the Calvin Cycle is what?
G3P
The first cells to split water were what?
Prokaryotes
A discrete packet of light is a what?
Photon
Oxygen is highly corrosive therefore,
Rust provides definitive evidence of large amounts of O2 int eh atmosphere.
Mesophyll cells in leaves are specialized for
photosynthesis
Thylakoids
are the membranous sacs found within a chloroplast
In photosynthesis -
redox reactions ultimately transfer electrons from H2O to CO2
Chlorophyll A is found at the reaction center of a
photosystem
In photosynthesis the immediate source of energy used to produce a proton gradient is
energy released as electrons are transferred from one carrier to another.