Light Reactions Flashcards
(28 cards)
What are the main products of the light reactions in photosynthesis?
ATP and NADPH
True or False: Light reactions occur in the stroma of the chloroplast.
False
Fill in the blank: The light reactions take place in the _____ membranes of the chloroplast.
thylakoid
What pigment absorbs light energy during the light reactions?
Chlorophyll
Which process splits water molecules during the light reactions?
Photolysis
What is the role of water in the light reactions?
To provide electrons and protons
Multiple Choice: Which of the following is NOT a stage of the light reactions? A) Photosystem II B) Calvin Cycle C) Electron Transport Chain D) Photosystem I
B) Calvin Cycle
What is produced as a byproduct of water splitting during the light reactions?
Oxygen
True or False: ATP synthase is involved in the synthesis of ATP during the light reactions.
True
Fill in the blank: The energy from sunlight is captured by _____ in the thylakoid membranes.
photosystems
What is the main function of the Electron Transport Chain in the light reactions?
To transfer electrons and create a proton gradient
Multiple Choice: Which of the following occurs first in the light reactions? A) ATP formation B) Water splitting C) NADPH formation D) Electron transport
B) Water splitting
What is the role of NADP+ in the light reactions?
To accept electrons and become NADPH
True or False: The light reactions convert solar energy into chemical energy.
True
Fill in the blank: The light energy absorbed by chlorophyll excites _____, which leads to the production of ATP and NADPH.
electrons
What is the purpose of the proton gradient created during the light reactions?
To drive ATP synthesis
Multiple Choice: Which of the following is a product of the light reactions? A) Glucose B) NADH C) ATP D) RuBP
C) ATP
What is the main difference between Photosystem I and Photosystem II?
Their absorption wavelengths and the order of their function
True or False: The light reactions do not require light to occur.
False
Fill in the blank: The light reactions are also known as the _____ stage of photosynthesis.
light-dependent
What is the final electron acceptor in the light reactions?
NADP+
Multiple Choice: Which molecule is regenerated in the light reactions to continue the cycle? A) Glucose B) RuBP C) ADP D) NADP+
D) NADP+
What is the significance of the light reactions to the overall process of photosynthesis?
They provide the energy and reducing power for the Calvin Cycle.
True or False: The light reactions produce glucose directly.
False
