Electron Transport Chain In Chloroplast Flashcards
(26 cards)
What is the primary function of the electron transport chain in chloroplasts?
To transfer electrons from water to NADP+, generating NADPH and ATP.
True or False: The electron transport chain occurs in the thylakoid membranes of chloroplasts.
True
Fill in the blank: The electron transport chain in chloroplasts is part of the __________ process.
light-dependent reactions
What are the two main products generated by the electron transport chain?
NADPH and ATP
Which molecule provides the electrons that enter the electron transport chain?
Water (H2O)
What is the role of photosystem II in the electron transport chain?
To absorb light energy and excite electrons.
What happens to water molecules during the electron transport chain?
They are split into oxygen, protons, and electrons (photolysis).
Multiple Choice: Which of the following is the final electron acceptor in the chloroplast electron transport chain?
A) Oxygen
B) NADP+
C) FAD
D) ATP
B) NADP+
What is the role of plastoquinone in the electron transport chain?
To transport electrons from photosystem II to the cytochrome b6f complex.
True or False: The energy released during electron transport is used to pump protons into the thylakoid lumen.
True
What is chemiosmosis in the context of the electron transport chain?
The process of using the proton gradient to synthesize ATP.
Which enzyme synthesizes ATP in the chloroplasts during the electron transport chain?
ATP synthase
Fill in the blank: The proton gradient created during electron transport is established across the __________ membrane.
thylakoid
What is the role of cytochrome b6f in the electron transport chain?
To transfer electrons from plastoquinone to plastocyanin.
Short Answer: What is the importance of NADPH produced in the electron transport chain?
It is used as a reducing agent in the Calvin cycle.
Which component of the electron transport chain is responsible for absorbing light energy?
Photosystems I and II
Multiple Choice: Which of the following does NOT occur in the electron transport chain?
A) ATP synthesis
B) Water splitting
C) Carbon fixation
D) Electron transfer
C) Carbon fixation
True or False: The chloroplast electron transport chain operates independently of light.
False
What is the main purpose of the light-dependent reactions in photosynthesis?
To convert light energy into chemical energy in the form of ATP and NADPH.
Fill in the blank: The energy from electrons moving through the electron transport chain is used to pump protons into the __________.
thylakoid lumen
What is the significance of the oxygen produced during the electron transport chain?
It is a byproduct of water splitting and released into the atmosphere.
Short Answer: Describe the pathway of electrons from water to NADP+ in the electron transport chain.
Electrons are extracted from water, transferred through photosystem II, cytochrome b6f, plastocyanin, and finally to NADP+.
What is the role of plastocyanin in the electron transport chain?
To transfer electrons from cytochrome b6f to photosystem I.
True or False: The electron transport chain is crucial for both ATP and NADPH production.
True
