Light-Dependent Reactions
This organelle is where photosynthesis occurs.
What is the chloroplast?
The Calvin Cycle takes place in this part of the chloroplast.
What is the stroma?
Cellular respiration occurs primarily in this organelle.
What is the mitochondria?
Which process stores energy in glucose?
What is photosynthesis?
In the BTB lab, the solution changed color because of this gas.
What is carbon dioxide?
This pigment absorbs light energy and appears green.
What is chlorophyll?
The Calvin Cycle uses this gas from the atmosphere.
What is carbon dioxide (CO₂)?
The overall equation for cellular respiration includes glucose and this gas.
What is oxygen (O₂)?
Which process releases energy from glucose?
What is cellular respiration?
In our colored light lab, plants under which color produced the most oxygen?
Red or blue light (depending on your results).
This molecule is split during the light-dependent reactions, releasing oxygen.
What is water (H₂O)?
If a plant is sealed in a container and carbon dioxide levels drop, what would happen to the Calvin Cycle?
It would slow down or stop because carbon dioxide is required for carbon fixation.
This stage of respiration produces 2 ATP and occurs in the cytoplasm.
What is glycolysis?
Which two molecules are products of photosynthesis but reactants in respiration?
What are glucose and oxygen?
Why did the plant in the dark closet begin to look pale?
Lack of chlorophyll production due to no light.
The two main energy-carrying molecules produced in the light-dependent reactions are these.
What are ATP and NADPH?
Why can the Calvin Cycle not occur without the light-dependent reactions?
Because it requires ATP and NADPH made in the light-dependent reactions.
This stage produces the most ATP.
What is the electron transport chain?
Which two molecules are products of respiration but reactants in photosynthesis?
What are carbon dioxide and water?
How does photosynthesis impact crop yield in agriculture?
More efficient photosynthesis increases sugar production, leading to better growth and yield.
If a plant is placed in red light versus green light, which would produce more ATP, and why?
Red light — because chlorophyll absorbs red light effectively, while green light is reflected.
If ATP production stopped, what would happen to the Calvin Cycle and why?
It would stop because ATP provides the energy needed to build sugars.
Why would glycolysis eventually stop if NAD⁺ were not regenerated?
Because NAD⁺ is needed to accept electrons; without it, the pathway cannot continue.
Explain how photosynthesis and cellular respiration form a biological cycle.
The products of one are the reactants of the other, cycling carbon and energy through ecosystems.
If a farmer reduces plant spacing too much, how might that impact photosynthesis rates?
Less light availability due to shading → reduced photosynthesis.