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WorksheetsPhotosynthesis basics
Total questions: 17
Worksheet time: 13mins
Which best describes photosynthesis?
High energy reactants, carbon dioxide and glucose are combined to form low energy compounds, oxygen and water.
High energy compounds, water and carbon dioxide are combined to form low energy compounds, carbohydrates.
Low energy reactants, carbon dioxide and glucose are combined to form high energy compounds, oxygen and water.
Low energy compounds, water and carbon dioxide are combined to form high energy compounds, carbohydrates.
Fundamentally photosynthesis is:
A catabolic reaction in which energy is released.
A catabolic reaction for which energy is required.
An anabolic reaction in which energy is released.
An anabolic reaction for which energy is required.
Which is the correct equation for the overall reaction of photosynthesis?
C6H12O6 + O2 --> 6CO2 + 6H20
C6H12O6 + 6CO2 --> 6H2O + 6O2
6CO2 + 6H2O --> C6H12O6 + 6O2
6CO2 + 6H2O --> 6O2 + C12H22O12
Glucose contains C, H and O. From where do green plants obtain the oxygen they require to make glucose?
Water (H2O) in the soil.
Carbon dioxide (CO2) in the atmosphere.
Oxygen (O2) in the atmosphere.
Oxygen (O2) in the soil.
Which statement is correct about the light dependent and light independent reactions of photosynthesis?
In the light dependent reactions, water is split into hydrogen and oxygen.
In the light independent reactions, water is split into hydrogen and oxygen.
In the light dependent reactions, sunlight is used to collect carbon dioxide from the surrounding atmosphere.
In the light independent reactions, sunlight is used to collect carbon dioxide from the surrounding atmosphere.
Only about 2% of available solar light is used in photosynthesis. Which of the following is NOT a cause of this inefficiency of photosynthesis.
Only about 45% of the light falls in the necessary wavelengths.
Green plants only use one pigment. chlorophyll, to 'capture' light energy.
Considerable light is reflected away from plants.
Photosynthesis reactions are inefficient - energy is lost as long wavelength heat.
Most green plants are highly adapted to optimise photosynthesis. Which of the following is NOT an adaptation to optimise photosynthesis?
Being able to grow upwards quickly, to obtain more sunlight.
Using multiple pigments in support of chlorophyll.
Arranging leaves in order to expose maximum leaf surface to sunlight.
Being able to reflect light away from the leaf's surface.
Which is a correct definition for the Law of Limiting Factors?
If a chemical process is affected by more than one factor, then its rate will be determined by the factor which is nearest to its maximum value.
If a chemical process is affected by two different factors, then its rate will always be determined by the first factor.
If a chemical process is affected by more than one factor, then its rate will be determined by the factor which is nearest to its minimal value.
If a chemical process is affected by two different factors, then its rate will always be determined by the second factor.
Look carefully at the graph and identify the red plot line. What factor is limiting the rate of photosynthesis of the red plot line.
Light intensity.
Carbon dioxide.
Water.
Temperature.
Fundamentally photosynthesis can be thought of as:
The way in which light energy is converted into chemical energy for the use of all organisms on the planet Earth.
The way in which green plants can store light energy for use by animals.
The way in which chemical compounds are used for cell respiration by all organisms on the planet Earth.
The way in which green plants obtain their energy by heterotrophic feeding.
Which one of the following best reflects the 2nd Law of Thermodynamics - 'energy transformations always lead to a loss of energy to the system'.
Energy transformations are 100% efficient.
Energy cycles in natural systems.
Energy cannot be created nor destroyed.
Approximately just 10% of the energy in one trophic level is passed on to the next trophic level.
the organelle shown in the image is:
The site of cell respiration.
A mitochondria.
A chloroplast.
The site of protein synthesis in a cell.
The image is a summary of which reactions in photosynthesis?
Light independent reactions.
Dark reactions.
Light dependent reactions.
Calvin Cycle.
The image is a summary of which reactions in photosynthesis?
The light dependent reactions.
The light independent reactions.
Photosystems I and II.
The splitting of water to create ATP.
The drawing shows a typical leaf with, on its lower surface, stomata. When the leaf is photosynthesising optimally, the net movement of substances into and out of the leaf is:
Water is leaving the stomata and oxygen is entering.
Oxygen is leaving the stomata and carbon dioxide is entering.
Glucose is leaving the stomata and water is also leaving.
Water, carbon dioxide and oxygen are all leaving the tomata.
In the floating leaf disk assay, to investigate the rate of photosynthesis:
The leaf disks float because they contain oxygen and are more dense than water.
The leaf disks float because they contain oxygen and are less dense than water.
The leaf disks sink because they contain oxygen and are more dense than water.
The leaf disks sink because they contain oxygen and are less dense than water.
Which statement about photosynthesis and cell respiration in green plant cells is true?
When a cell is respiring, it cannot be photosynthesising.
When a cell is photosynthesising, it cannot be respiring.
Photosynthesis and cell respiration can occur in a cell at the same time.
The products of photosynthesis cannot be used in cell resppiration.
