The role of ___________ is to provide matter for making _________ which is the main output for photosynthesis.
carbon dioxide, water
carbon dioxide, sugar
oxygen, water
oxygen, sugar
Describe the roles of NADPH and ATP in the light-independent reactions.
providing the carbon for sugar molecules
supplying the energy necessary to assemble sugar molecules
providing the oxygen for sugar molecules
absorbing the energy of light & transferring it to electrons
Plants use the green pigment chlorophyll to __________________.
store sunlight
change light energy to heat energy
reflect sunlight
absorb sunlight
The splitting of water releases what into the atmosphere?
carbon dioxide
oxygen
none of the above
water vapor
Which of the following organisms would undergo photosynthesis?
all of these
sunflower
tulip
pea plant
Which of the following organisms would be an example of a photosynthetic organism?
E. Coli
Crab grass
amoeba
tigers
Why does Carbon Dioxide need to be fixed during photosynthesis?
so the plant can make water
so the plant can actually use the oxygen
so the plant can break down ATP
so the plant can actually use the carbon
Where does the carbon dioxide come from in photosynthesis?
from the breaking down of ATP into ADP
none of the above
from the roots
from the atmosphere
Which is the role of the electron transport chain in the process of photosynthesis?
carrying e- from PS II, to PS I, and to NADP+
removing electrons from the chloroplast
cycling electrons between photosystem I and photosystem II
adding energy to the electrons that enter photosystem I
During the light-dependent reactions of photosynthesis, which event must occur for ATP synthase to function properly?
Photosystem I and photosystem II must be deactivated
ATP must release a phosphate group to become ADP
Molecular oxygen must combine with ATP synthase
H+ ions must pass through a channel within ATP synthase
Which of the following gets "fixed" during photosynthesis?
Hydrogen
Carbon
Oxygen
Glucose
One of the products of photosynthesis is _______________.
carbon dioxide
water
light energy
oxygen
In the diagram, an arrow leads from the splitting of water, to the two photosystems, and then to NADP+. What process is represented by this arrow?
the formation of high-energy sugars
the conversion of electrons into sunlight
the cycling of light energy within the photosystems
the movement of electrons along the electron transport chain
In order for the Calvin cycle to occur, ______________________ needs to be present.
ATP
Both ATP & NADPH
NADPH
Water
The purpose of photosystem 1 is to...
recharge the electrons
fixing carbon
intial light absorption
replenishing RuBP
The light-independent reactions of photosynthesis are also known as the ___________________.
Calvin cycle
sugar cycle
carbon cycle
ATP cycle
Alan is developing a model of the light-independent reactions of photosynthesis, also known as the Calvin cycle. How should the model show how carbon compounds enter and exit the cycle?
enter as carbon dioxide, exit as 3-carbon molecules
enter as glucose, exit as 3-carbon molecules
enter as glucose, exit as carbon dioxide
enter as carbon dioxide, exit as 6-carbon molecules
What BEST describes the roles of photosystem I and photosystem II in the process of photosynthesis?
Transfer e- from a series of intermediates to form NADPH
They absorb sunlight and distribute the energy as heat.
They form ATP as hydrogen ions cross the thylakoid membrane.
They absorb sunlight and transfer the energy to electrons.
The clusters of chlorophyll and proteins that absorb sunlight and generate high-energy electrons in the chloroplasts are called ______________________.
photosystems
synthase proteins
carrier proteins
transport chains
Adrianne is explaining why chlorophyll is classified as a plant pigment and how it is useful in photosynthesis. Which property of chlorophyll would be most appropriate for her to cite?
chlorophyll's ability to absorb light.
chlorophyll's reactivity with oxygen.
chlorophyll's green color.
chlorophyll's presence in chloroplasts.
Which of the following is used by cells to store and release the energy needed to power cellular processes?
ATP
RNA
DNA
NADP+
What BEST describes the role of light in the overall process of photosynthesis?
Light provides energy to break sugars into small molecules
Light accepts the energy that is released by sugars.
Light provides energy for making small molecules into sugars
Light accepts the energy that is released by small molecules
_______________ are organisms that make their own food.
Herbivores
Autotrophs
Omnivores
Heterotrophs
The light-dependent reactions of photosynthesis occurs in the _____________ of the chloroplast.
cytoplasm
thylakoid membranes
stroma
all of the above
High-energy electrons are transported from chlorophyll to other molecules in the chloroplast by _______________________.
the protein ATP synthase
pigments such as carotene
the thylakoid membranes
electron carriers such as NADP+
Which of the following would be a reactant in the overall equation of photosynthesis?
Glucose
Water
Oxygen
all of the above
A chloroplast contains thylakoid stacks, called ___________, that are surrounded by fluid-filled __________.
none of these
chloroplasts, cytoplasm
grana, stroma
stroma, grana
The role of water molecules is to produce ____________ and hydrogen ions during the _________________________.
electrons, light-independent reactions
carbon dioxide, light-independent reactions
carbon dioxide, light-dependent reactions
electrons, light-dependent reactions