Which of the following affects the rate of photosynthesis?
light intensity
water
temperature
all of the above
What are the products of the light-dependent reactions?
oxygen gas
ATP
NADPH
In the light reactions of photosynthesis, which is the molecule complex that energizes electrons just before going to the Calvin cycle?
photosystem 2
ATP synthase
electron transport chain
photosystem 1
Ingenhousz showed that plants produce oxygen bubbles when exposed to
carbon dioxide
a burning candle
light
What is a product of the Calvin cycle?
glucose
Plants gather the sun's energy with light-absorbing molecules called
pigments
thylakoids
chloroplasts
The Calvin cycle takes place in the
photosystems
stroma
thylakoid membranes
chlorophyll molecules
Jan van Helmont concluded that plants gain most of their mass from
the soil
oxygen in the air
carbon dioxide in the air
How does carbon dioxide get into the plant?
stomata (stomates)
roots
osmosis
What is the name of the enzyme that combines CO2 with a 5-carbon molecule to begin the Calvin cycle?
Rubisco
Polycalvinase
Deoxyribonase
What is the 5-carbon molecule in the Calvin Cycle that joins with the incoming CO2?
ribose
AUG
deoxyribose
RuBP
If carbon dioxide is removed from a plant's environment, what would you expect to happen to its production of high-energy sugars?
No sugars will be produced.
The same number of sugars will be produced but without carbon dioxide.
More sugars will be produced.
Carbon dioxide does not affect the production of high-energy sugars in plants.
The Calvin cycle is another name for
light-independent reactions
photosynthesis
light-dependent reactions
Which of the following is an autotroph?
tree
monkey
dog
mushroom
What term describes the chemical reaction that ADDs electrons to a molecule?
reduction
transformation
chargification
oxidation
Most plants appear green because chlorophyll
absorbs green light
does not absorb green light
does not absorb violet light
does not absorb red light
A granum is a(an)
photosynthetic pigment molecule
membrane enclosing a thylakoid
stack of chloroplasts
stack of thylakoids
According to your reading, if you continue to increase the intensity of light that a plant receives, what happens?
The rate of photosynthesis increases and then levels off.
The rate of photosynthesis does not change.
The rate of photosynthesis increases with light intensity.
The rate of photosynthesis decreases with light intensity.
Energy is released from ATP when
ATP is exposed to sunlight
a phosphate group is removed
a phosphate group is added
adenine bonds to ribose
Which of the following is NOT a part of an ATP molecule?
phosphate
adenine
chlorophyll
The light-collecting units of a chloroplast are the
electron carriers
high-energy sugars
Which step is the beginning of photosynthesis?
HIgh-energy electrons move through the electron transport chain
Pigments in photosystem I absorb light
Pigments in photosystem II absorb light
ATP synthase allows H+ ions to pass through the thylakoid membrane
The stroma is the space that surrounds
plant cells
Which scientists showed that plants need light to produce oxygen?
Priestley and Calvin
Priestley and Ingenhousz
van Helmont and Calvin
van Helmont and Priestley
Which of the following is NOT required for photosynthesis to occur?
oxygen
