WorksheetsPhotosynthesis Grade 12
Total questions: 15
Worksheet time: 8mins
What is the primary function of the light-dependent reactions in photosynthesis?
Regulate the temperature of the plant
Convert light energy into chemical energy
Produce oxygen as a byproduct
Generate glucose directly from sunlight
Which molecules are produced as a result of the light-dependent reactions?
ADP and NADP+
ATP and NADPH
Glucose and Oxygen
Carbon Dioxide and Water
What is the role of chlorophyll in the light-dependent reactions?
Chlorophyll absorbs light energy and converts it into chemical energy.
Chlorophyll stores excess light energy for later use in the light-dependent reactions.
Chlorophyll breaks down water molecules to produce glucose in the light-dependent reactions.
Chlorophyll releases oxygen into the atmosphere during the light-dependent reactions.
Explain the process of photolysis in the light-dependent reactions.
Photolysis involves the breakdown of glucose into oxygen, protons, and electrons.
Chlorophyll absorbs water and releases oxygen, carbon dioxide, and electrons.
Light energy is used to convert carbon dioxide into glucose, water, and protons.
Light energy is absorbed by chlorophyll, which splits water into oxygen, protons, and electrons.
What is the Calvin cycle and where does it take place in the chloroplast?
The Calvin cycle takes place in the stroma of the chloroplast.
The Calvin cycle takes place in the vacuole of the chloroplast.
The Calvin cycle happens in the cytoplasm of the chloroplast.
The Calvin cycle occurs in the thylakoid membrane of the chloroplast.
What are the three main steps of the Calvin cycle?
Carbon fixation, reduction phase, regeneration of RuBP
Photosynthesis, respiration, transpiration
Carbon fixation, oxidation phase, regeneration of RuBP
Light reaction, dark reaction, photorespiration
How is carbon dioxide converted into glucose during the Calvin cycle?
Through a direct conversion process without any intermediate steps
By using oxygen as a catalyst to speed up the reaction
Through a single-step reaction involving only one enzyme
Through a series of reactions involving RuBisCO and multiple steps including carbon fixation, reduction, and regeneration of RuBP.
What factors can affect the rate of photosynthesis?
Soil pH, wind speed, humidity
Nitrogen concentration, cloud cover, soil type
Altitude, precipitation, time of day
Light intensity, carbon dioxide concentration, temperature, water availability
How does temperature influence photosynthesis?
Photosynthesis occurs faster at lower temperatures.
Higher temperatures decrease the efficiency of photosynthesis.
Temperature has no impact on photosynthesis.
Temperature affects the rate of enzyme activity in photosynthesis.
Discuss the impact of light intensity on the process of photosynthesis.
Photosynthesis occurs faster in the absence of light
Higher light intensity decreases photosynthetic activity
Light intensity impacts photosynthesis by influencing the rate at which it occurs. Higher light intensity generally leads to increased photosynthetic activity up to a certain threshold.
Light intensity has no impact on photosynthesis
Explain the role of water availability in photosynthesis.
Water availability only affects the color of plants
Photosynthesis can occur without water
Water availability is not important for photosynthesis
Water availability is essential for the light-dependent reactions of photosynthesis, where water molecules are split to produce oxygen, protons, and electrons necessary for generating ATP and NADPH.
Write the balanced chemical equation for photosynthesis.
6CO2 + 6H2O -> C6H12O6 + 6O2
6CO2 + 6H2O + light energy -> C6H12O6 + 6O2
6CO2 + 6H2O + ATP -> C6H12O6 + 6O2
6CO2 + 6H2O + heat energy -> C6H12O6 + 6O2
What is the overall purpose of photosynthesis in plants?
Plants perform photosynthesis to absorb water from the soil
The purpose of photosynthesis is to convert glucose into light energy
Photosynthesis in plants is for producing oxygen only
The overall purpose of photosynthesis in plants is to convert light energy into chemical energy stored in glucose.
How does photosynthesis contribute to the oxygen cycle?
Photosynthesis contributes to the oxygen cycle by releasing oxygen into the atmosphere.
Photosynthesis has no impact on the oxygen cycle
Photosynthesis converts oxygen into carbon dioxide
Photosynthesis absorbs oxygen from the atmosphere
Describe the relationship between photosynthesis and cellular respiration.
Photosynthesis and cellular respiration are completely unrelated processes.
Photosynthesis and cellular respiration occur in different organisms.
Photosynthesis and cellular respiration compete for the same resources.
Photosynthesis and cellular respiration are complementary processes where the products of one process are used as reactants in the other process.
