NEW
Font size
Worksheetsphotosynthesis 2
Total questions: 20
Worksheet time: 10mins
The light reactions occur in the ________, while the Calvin cycle occurs in the ________.
thylakoid membranes . . . stroma
stroma . . . thylakoid membranes
cytoplasm . . . thylakoid membrane
cytoplasm . . . stroma
stroma . . . nucleus
Which of the following are produced during the light reactions of photosynthesis?
ATP, NADPH, O2
glucose, ADP, NADP+
ADP, NADP+, O2
ATP, NADPH, CO2
glucose, ADP, NADP+, CO2
Which of the following is part of the light reaction?
regeneration of NADP+
formation of waste products in the form of O2
addition of electrons and protons to carbon
reduction of carbon
carbon fixation
Which of the following are produced during the Calvin cycle?
ADP, NADP+, O2
glucose, ADP, NADP+
glucose, ADP, NADP+, CO2
ATP, NADPH, O2
ATP, NADPH, CO2
Carbon fixation
provides the cell with a supply of NADPH molecules.
ses noncyclic electron flow to capture energy in glucose.
powers the process of glucose synthesis by supplying the cell with ATP.
occurs when carbon and oxygen from CO2 are incorporated into an organic molecule.
occurs during the light reactions
Sunlight is a type of ________ energy.
kinetic
stored
electromagnetic
potential
Nuclear
The full range of electromagnetic energy is called the ________ spectrum.
energy
wavelength
Visible
ultraviolet
electromagnetic
Why are most plants green?
Chlorophyll b primarily uses green light as the source of energy for photosynthesis.
Chlorophyll a absorbs green light.
All photosynthetic pigments are colored green.
Chlorophyll a reflects green light.
Green helps plants blend into their environment as a sort of camouflage
Which of the following colors contributes the least energy to photosynthesis?
violet
red
green
orange
blue
Of the following wavelengths of light, which would you expect to be reflected or transmitted by chlorophyll a?
orange
green
yellow
red
blue
Chlorophyll b and carotenoids
pass absorbed energy to chlorophyll a.
are located on the inner membrane of the chloroplast.
catalyze the incorporation of carbon atoms into RuBP
are best at absorbing the energy of green light.
are found at the reaction center.
Which of the following statements about the absorption of photons by pigment molecules is true?
The release of energy by the excited electron can be as heat, light, or fluorescence.
Photons raise electrons in pigments to the ground state.
Pigments only lose energy in the excitation process.
It takes several minutes for the pigment electrons to become excited.
Excitation of the electrons is a very stable state.
Which of the following photosynthetic pigments can be found at the photosystem reaction center?
chlorophyll b
eosinophyll
a carotenoid
phycocyanin
chlorophyll a
Which of the following is a normal process of photosynthesis that could not occur if all reaction centers were inactivated by a toxin?
donation of excited electrons by chlorophyll b to a primary electron acceptor
absorption of photons by carotenoids
donation of excited electrons by chlorophyll a to a primary electron acceptor
reduction of chlorophyll b by a primary electron acceptor
absorption of photons by chlorophyll b
How do the reaction centers of photosystem I and II differ?
Photosystem II does not transfer electrons from photons.
Photosystem I functions first in the sequence of steps that make up the light reactions.
Only photosystem I is found in the thylakoid membranes.
Chlorophyll a is found in photosystem I and chlorophyll b in photosystem II.
Each preferentially absorbs slightly different wavelengths of light.
Clusters of light-gathering pigments in a photosystem
pass energy to the reaction center.
are found in the roots of plants.
do not absorb photons.
break down H2O.
absorb electrons.
In a photosystem, clusters of chlorophyll a, chlorophyll b, and carotenoid pigments function most like
a windmill.
an antenna.
a propeller on a motorboat.
electrical generator.
a spring.
The electron transport chains of the light reactions
are located in the stroma.
are found on the inner membrane of chloroplasts.
are very different from those of cellular respiration.
provide energy for the Krebs cycle.
shuttle electrons along in a series of redox reactions.
The energy that excites P680 and P700 is supplied by
the breaking of glucose bonds
electrons passing down the electron transport chain.
NADPH.
photons.
ATP.
As a result of the cascade of electrons down the electron transport chains of the light reactions,
NADP+ is oxidized to NADPH.
NADPH is reduced to NADP+
NADPH is oxidized to NADP+.
water is formed.
NADP+ is reduced to NADPH.
