6CO2+6H2O+sunlight –> C6H12O6+6O2
The summary equation for photosynthesis is
Burning wood contributes more to acid rain than burning fossil fuels
Which of the following statements regarding photosynthesis and carbon dioxide is false?
producers
What is the name given to organisms that can make their own food and the food for the biosphere?
photoautotrophs
Autotrophs that utilize light as their energy source are
concentrated in a zone of leaf tissue called the mesophyll
In most green plants, chloroplasts are
stomata
CO2 enters and O2 escapes from a leaf via
stroma
In the chloroplast, sugars are made in a compartment that is filled with a thick fluid called the
grana
Chloroplasts contain disklike membranous sacs arranged in stacks called
thylakoid membranes
Where is chlorophyll found in a plant cell?
water
The oxygen released into the air as a product of photosynthesis comes from
In photosynthesis, carbon dioxide is reduced to form sugar, while in respiration, sugar is oxidized to form carbon dioxide.
Which of the following statements concerning the role of redox reactions in photosynthesis and cellular respiration is true?
light
What is the source of energy that provides the boost for electrons during photosynthesis?
thylakoid membranes… stroma
The light reactions occur in the ________, while the Calvin cycle occurs in the __________.
ATP, NADPH, O2
Which of the following are produced during the light reactions of photosynthesis?
glucose, ADP, NADP+
Which of the following are produced during the Calvin cycle?
occurs when carbon and oxygen from CO2 are incorporated into an organic molecule
Carbon fixation
electromagnetic
Sunlight is a type of _____ energy
Chlorophyll a reflects green light.
Why are most plants green?
green
Which of the following colors contributes the least energy to photosynthesis?
carotenoids
Plant cells are protected from the harmful effects of oxygen radicals with
photon
A packet of light energy is called a
The release of energy by the excited electron can be as heat, light or fluorescence
Which of the following statements about the absorption of photons by pigment molecules is true?
chlorophyll a
Which of the following photosynthetic pigments can be found at the photosystem reaction center?
Each preferentially absorbs slightly different wavelengths of light
How do the reaction centers of photosystem I and II differ?
photons
The energy that excites P680 and P700 is supplied by
shuttle electrons along in a series of redox reactions
The electron transport chains of the light reactions
NADP+ is reduced to NADPH.
As a result of the cascade of electrons down the electron transport chains of the light reactions,
the bottom of the electron transport chain
The electrons lost from the reaction center of photosystem I are replaced by electrons from
H2O
The electrons lost from the reaction center of photosystem II are replaced by electrons from
the final electron acceptor is NADP+ and not oxygen.
Photophosphorylation differs from oxidative phosphorylation in that
H+… stroma…H+
In photophosphorylation, energy from electron flow is used to transport ______ from the _______ to the thylakoid compartment, generating a concentration gradient of _____.
chemical… food… light
Mitochondria transfer _________ energy from ___________ to ATP; chloroplasts transform ______ energy into the chemical energy of ATP.
carbon dioxide
Photosynthetic organisms derive their carbon from
six
To produce one glucose, the Calvin cycle needs to be run through ______ time(s).
G3P
The Calvin cycle constructs ________, an energy-rich molecules that a plant cell can then use to make glucose or other organic molecules.
photosynthesis
The ultimate source of all the food we eat and the oxygen we breathe is
a fuel for cellular respiration and a starting material for making other organic molecules
Plants use sugars as
have mitochondria and chloroplasts
Plant cells
reduced by photosynthesis, which removes carbon dioxide from the atmosphere
The greenhouse effect is
The greenhouse effect is exacerbated by the use of fossil fuels
Which of the following statements about the greenhouse effect is true?
protects Earth from UV radiation
Ozone
three
Ozone consists of _______ oxygen atom(s).
chlorofluorocarbons
Which of the following has been a major source of ozone destruction over the past 50 years?
structure C
In this drawing of a chloroplast, which structure represents the thylakoid membrane?
through an electron transport chain molecule
According to this figure, how do H+ ions make their way from the stroma to the thylakoid interior?
absorb more CO2 than the plants under the green light
Based on your knowledge of the process of photosynthesis, the plant in the container placed under red light would probably
CO2 is needed to produce sugars in the Calvin cycle.
Carbon dioxide absorption is an appropriate indicator of photosynthesis because
…
Refer back to numbers 48&49
