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WorksheetsPhotosynthesis
Total questions: 20
Worksheet time: 10mins
Red and blue light support the highest rates of photosynthesis because
Only wavelength that carotenoid cannot absorb
Chlorophylls absorb light of these wavelengths more then other wavelengths
Light of these wavelengths have the highest energy in the visible spectrum
Light of these wavelengths activate ATP synthase enzyme
Cyclic photophosphorylation differs from non-cyclic photophosphorylation in that ___________ is not made from the process
ATP
PGAL
NADH
NADPH
Flattend sacs of internal membranes associated with photosynthesis are called
Chloroplasts
The stroma
Cristae
Thylakoids
The role of water molecule in light dependent reaction is to
Hydrolyse NADP+ at the end of the ETC
Involve directly in the production of ATP
Replace the excited electron of reaction centre molecule in photosystem II
Involve directly in Calvin Cycle
Which of the following molecule below is fixed during light dependent reaction?
Oxygen
Carbon dioxide
ATP
NADPH
Which of the following plants fixes carbon dioxide at night?
Sugarcane
Cactus
Oryza sativa
Hibiscus rosa-sinensis
How many carbon dioxide molecule must be added to RuBP to make a single molecule of glucose?
3
4
5
6
In C4 plants, reactions that fix CO2 into four carbon compounds occur in
Guard cells
Epidermal cells
Mesophyll cells
Bundle-sheath cells
Intermediate metabolite which is formed during the light independent reaction in photosynthesis is
NADH
Oxygen
Ribulose bisphosphate
Water
In green plant photosynthesis, the electron donor for the light dependent reaction is
carbon dioxide
oxygen
RuBP
water
The main function of the light dependent reactions is
Produce glucose from CO2 and water
Produce ATP and NADPH
Produce NADPH only
Convert light energy to chemical energy
Calvin cycle takes place in
Stroma
Thylakoid membrane
Cytoplasm
Chlorophyll
Why C4 plants are able to carry out photosynthesis efficiently?
They do not involve in Calvin cycle
They use PEP carboxylase to fix carbon dioxide
They are adapted to cold climates
They conserve water efficiently
Photorespiration lowers the efficiency of photosynthesis by preventing the formation of
Carbon dioxide molecules
3-phosphoglycerate molecules
ATP molecules
Ribulose bisphosphate molecules
In the Hatch Slack pathway, the first carbon dioxide acceptor is
malate
oxaloacetate
phosphoenolpyruvate
ribulose bisphosphate
Rubisco binds with both carbon dioxide and oxygen in
C3 plants
C4 plants
CAM plants
C4 plants
CAM plants keep stomata closed in daytime, thus reducing the loss of water. They can do this because
fix CO2 into organic acids during the night
fix CO2 into sugars in the bundle-sheath cells
fix CO2 into pyruvate in the mesophyll cells
use the enzyme phosphofructokinase, which outcompetes rubisco for CO2
The reaction- center chlorophyll of photosystem is known as P700 because
there are 700 chlorophyll molecules in the center
the pigment best at absorbing light with a wavelength of 700 nm
there are 700 photosystem I components to each chloroplast
it absorbs 700 photons per microsecond
Oxygen produced by photosynthesis comes directly from
Light
Carbon dioxide
Glucose
Water
Which of the following does NOT occur during the Calvin Cycle
carbon fixation
oxidation of NADPH
release of oxygen
regeneration of the carbon dioxide acceptor
