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