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WorksheetsIB Photosynthesis
Total questions: 25
Worksheet time: 25mins
Order the following steps of photosynthesis in chronological order.
An electron from chlorophyll a becomes "excited" and jumps into an ETC
An electrochemical gradient is established with a high concentration of H+ inside of the lumen of the thylakoid.
ATP is generated through chemiosmosis and ATP synthase.
NADPH and ATP is used to convert G3P into TP
RuBP is regenerated through 10 molecules of triose phosphate
Click the location of the light dependent reactions.
Click the location of the light independent reactions.
Sort the steps of photosynthesis into the light dependent or light independent reactions.
Occurs in the thylakoid membranes
Produces NADPH
Occurs in the stroma
Produces NADP+
Produces ATP
Produces ADP
Produces Oxygen
Produces Glucose
Requires light
Produces RuBP
The action spectra for two different types of photosynthetic organisms are shown. Ulva, or seas lettuce, is a green marine alga composed of two layers of cells. The action spectrum for crop plants was plotted from an average of 22 species of plants.
Ulva photosynthesizes more than crop plants at red wavelengths.
Crop plants photosynthesize more than Ulva in green light.
Photosynthesis by Ulva is highest in red light while that of crop plants is highest in blue.
Both have zero photosynthesis at 750 nm.
A summary diagram of photosynthesis is shown. Which molecule represents ATP?
A
B
C
D
Which process occurs during the light-dependent reaction of photosynthesis?
ATP, CO2, and H2O are priduced
CO2 is used to produce carbohydrates
ATP and O2 are produced.
RuBP is phosphorylated
What is used to reduce NADP in the light-dependent reactions of photosynthesis?
Conversion of ATP into ADP + P
Electrons from Photosystem I
Protons from the thylakoid space
Oxygen released by the photolysis of water
Drag the molecule to the correct location on the diagram.
NADPH
O2
C6H12O6
The graph shows atmospheric oxygen levels over time. About 2.5 billion years ago, a significant rise in atmospheric oxygen occurred. What was the cause of this rise?
Photosynthesis by non-vascular land plants.
Photosynthesis by vascular land plants.
Oxygen produced by photosynthetic bacteria being released from the ocean into the atmosphere.
Volcanic activity
Which process does not take place in the stroma of chloroplast?
Synthesis of carbohydrates
Fixation of carbon
Reduction of NADP
Synthesis of ribulose bisphosphate
Which technological advancement enabled Calvin to perform his lollipop experiment on the light-independent reaction of the photosynthesis in 1949?
Methods for tracing radioactive carbon incorporated in molecules produced by the alga Chlorella
Development of electron microscopes enabling the molecules produced by the alga Scenedesmus to be viewed.
Methods for changing the wavelength of light shining on the alga Scenedesmus contained in the lollipop.
Development of X-ray diffraction techniques enabling the molecules produced by the alga Chlorella to be identified.
How can the rate of photosynthesis be measured?
I. By the amount of oxygen produced
II. By the increase in biomass
III. By the amount of carbon dioxide produced
A. I only
B. I and II only
C. I and III only
D. I, II and III
Which of the following is the correct equation for PHOTOSYNTHESIS?
CO2 + light + H2O --> O2 + Sugar
CO2 + sugar + H2O --> O2 + light
O2 + light + H2O --> CO2 + Sugar
CO2 + O2 + H2O --> Light+ Sugar
What are the two products of the light reactions that are needed for the calvin cycle?
NAD and NADPH
NADP + and Glucose
NADPH and ATP
Oxygen and NADPH
The important gases, carbon dioxide and oxygen, enter and leave the leaf through the
upper epidermis
phloem
stomata
guard cells
Where does the light independent reaction take place?
Matrix
Stroma
Thylakoid membrane
Cytoplasm
Temperatures that are too high can slow photosynthesis because
stomata stay open
enzymes are ruined
there is not enough CO2
there is too much water
Which is not a phase of the Calvin Cycle?
Carbon Fixation
Reduction
Regeneration of RuBP
Regeneration of Oxaloacetate
Stages of the Calvin Cycle in order
Regeneration, Carboxylation, Reduction
Reduction, Carboxylation, Regeneration
Carboxylation, Reduction, Regeneration
Which pigment is primarily responsible for absorbing light during photosynthesis?
Chlorophyll a
Chlorophyll b
Carotenoids
Xanthophylls
What is the main purpose of the light-dependent reactions of photosynthesis?
To produce glucose
To generate ATP and NADPH
To fix carbon dioxide
To release oxygen
In which part of the chloroplast do the light-independent reactions occur?
Thylakoid membrane
Stroma
Granum
Outer membrane
