Photosynthesis
Biology ⇒ Plant Biology
Photosynthesis starts at 6 and continues till grade 12.
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A plant is placed in a sealed container with only water and light. After several hours, the oxygen concentration in the container increases. What process is responsible for this change?
A scientist measures the rate of photosynthesis in a plant under different light intensities. She observes that the rate increases with light intensity up to a point, then levels off. Explain why this occurs.
Describe the function of accessory pigments in photosynthesis.
Describe the role of ATP synthase in photosynthesis.
A plant is placed in a sealed container with only water and light. After several hours, the oxygen concentration in the container increases. What process is responsible for this change?
A scientist measures the rate of photosynthesis in a plant under different light intensities. She observes that the rate increases with light intensity up to a point, then levels off. Explain why this occurs.
A plant is exposed to an atmosphere containing only 18O-labeled water (H218O) and normal CO2. After photosynthesis, which molecule(s) will contain the 18O isotope?
A researcher measures the rate of photosynthesis in a leaf at different CO2 concentrations while keeping light intensity and temperature constant. She observes that the rate increases with CO2 concentration up to a certain point, then plateaus. Explain the most likely reason for this plateau.
Which of the following best describes the role of NADP+ in photosynthesis?
(1) Electron donor
(2) Electron acceptor
(3) Oxygen carrier
(4) ATP producer
Which of the following best explains why plants appear green?
(1) They absorb green light
(2) They reflect green light
(3) They produce green pigments
(4) They lack chlorophyll
Which of the following factors does NOT directly affect the rate of photosynthesis?
(1) Light intensity
(2) Temperature
(3) Soil pH
(4) CO2 concentration
Which of the following is a difference between cyclic and non-cyclic photophosphorylation?
(1) Only cyclic produces NADPH
(2) Only non-cyclic produces ATP
(3) Cyclic does not produce O2
(4) Non-cyclic does not involve photosystem I
Fill in the blank: The enzyme responsible for carbon fixation in the Calvin cycle is _______.
Fill in the blank: The first stable product of carbon fixation in C3 plants is _______.
Fill in the blank: The main product of the Calvin cycle is _______.
Fill in the blank: The overall chemical equation for photosynthesis is 6CO2 + 6H2O + light energy → C6H12O6 + _______.
True or False: All plants use the same pathway for carbon fixation during photosynthesis.
True or False: C4 plants are more efficient than C3 plants under high temperature and low CO2 conditions.
True or False: Oxygen is produced during the Calvin cycle.
True or False: The Calvin cycle requires direct sunlight to function.
