Increasing the concentration of carbon dioxide around a plant will MOST likely increase the rate of photosynthesis up to a certain point, because:
CO2 is a reactant in photosynthesis.
CO2 is a product of photosynthesis.
CO2 absorbs light energy.
CO2 regulates the opening and closing of stomata.
Related Questions
Solarisation is
Formation of chlorophyll
Destruction of chlorophyll
Utilization of sunlight
Effects of solar light
Photosynthetic enhancement with flashing light was first observed by
Benson and Calvin
Hill and Calvin
Hatch and Slack
Emerson and Arnold
A plant is exposed to green light only. Which of the following is the most likely outcome regarding photosynthesis?
The rate of photosynthesis will be significantly reduced.
The rate of photosynthesis will be enhanced.
The rate of photosynthesis will proceed at a normal rate.
The plant will switch to utilizing green light efficiently.
Which of the following factors does NOT directly affect the rate of photosynthesis?
Light intensity
Carbon dioxide concentration
Temperature
Soil pH
Increasing the concentration of carbon dioxide around a plant will MOST likely increase the rate of photosynthesis up to a certain point, because:
CO2 is a reactant in photosynthesis.
CO2 is a product of photosynthesis.
CO2 absorbs light energy.
CO2 regulates the opening and closing of stomata.
A mutation affects a plant's ability to synthesize carotenoids. Which of the following would be the MOST LIKELY consequence for photosynthesis under high light intensity?
Enhanced light absorption and increased photosynthetic rate.
Increased damage to chlorophyll and photosystems due to excessive light energy.
No significant change in photosynthetic rate or chlorophyll integrity.
Shift in the absorption spectrum towards longer wavelengths.
How does the availability of magnesium ions (Mg2+) directly influence the light-dependent reactions of photosynthesis?
Mg2+ acts as a cofactor for Rubisco, facilitating CO2 fixation.
Mg2+ is a component of the electron transport chain, mediating electron flow.
Mg2+ is essential for chlorophyll structure and function, influencing light absorption and energy transfer.
Mg2+ regulates stomatal opening and closing, controlling CO2 uptake.
Under conditions of high temperature and drought stress, a plant closes its stomata to conserve water. Which of the following is the MOST DIRECT consequence on the Calvin cycle?
Increased photorespiration due to oxygen accumulation.
Enhanced ATP synthesis due to increased proton gradient.
Reduced availability of CO2 limits carboxylation, leading to a decrease in RuBP regeneration.
Increased activity of Rubisco due to higher substrate concentration.
How does an increase in atmospheric CO2 concentration initially affect the rate of photosynthesis, assuming other factors are optimal?
Increases the rate
Decreases the rate
Has no effect
Causes photorespiration
A C4 plant and a CAM plant are grown under identical environmental conditions. Which statement BEST describes their relative water use efficiency (WUE) and photosynthetic rates under prolonged high light intensity and high temperature?
The C4 plant will have both higher WUE and a higher photosynthetic rate than the CAM plant.
The CAM plant will have higher WUE than the C4 plant, but the C4 plant will have a higher photosynthetic rate.
The C4 plant will have higher WUE than the CAM plant, but the CAM plant will have a higher photosynthetic rate.
The CAM plant will have both higher WUE and a higher photosynthetic rate than the C4 plant.
