Photosynthesis—LDR Flashcards
What is the primary purpose of the light-dependent reactions in photosynthesis?
To convert solar energy into chemical energy in the form of ATP and NADPH.
True or False: Light-dependent reactions occur in the stroma of chloroplasts.
False; they occur in the thylakoid membranes.
Fill in the blank: The light-dependent reactions use _____ to capture light energy.
chlorophyll
What are the two main products of the light-dependent reactions?
ATP and NADPH.
Which process occurs during the light-dependent reactions to generate oxygen?
Photolysis of water.
Multiple choice: Which molecule is a byproduct of the light-dependent reactions? A) Glucose B) Oxygen C) Carbon Dioxide
B) Oxygen
What role does the electron transport chain play in the light-dependent reactions?
It facilitates the transfer of electrons and helps generate ATP and NADPH.
True or False: The light-dependent reactions can occur in the absence of light.
False; they require light to take place.
What is the significance of ATP synthase in the light-dependent reactions?
It synthesizes ATP from ADP and inorganic phosphate using the proton gradient.
Fill in the blank: The light-dependent reactions convert _____ energy into chemical energy.
light
What are the two complexes involved in the light-dependent reactions?
Photosystem I (PSI) and Photosystem II (PSII).
Multiple choice: Which pigment is primarily responsible for capturing light energy? A) Carotenoids B) Chlorophyll a C) Anthocyanins
B) Chlorophyll a
What is the role of NADP+ in the light-dependent reactions?
It acts as an electron carrier, becoming reduced to NADPH.
True or False: The light-dependent reactions produce glucose directly.
False; glucose is produced in the light-independent reactions.
What is the source of electrons that replace those lost by chlorophyll in photosystem II?
Electrons from the photolysis of water.
