Biology Science Notebook
1st Edition
ISBN: 9780078961014
Author: GLENCOE
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 8.2, Problem 4MI
Summary Introduction
To define:
The given word “transport” to show its meaning
Expert Solution & Answer
Answer to Problem 4MI
Transport means “to carry something from one place to another”.
Explanation of Solution
The light dependent reaction is also called light reaction. It occurs in the thylakoids of chloroplasts. First the chlorophyll absorbs light energy and this excites the electrons in photosystem II. It splits water molecule producing an electron, a hydrogen ion and oxygen as waste product. The excited electrons move from PSII to PSI through electron- acceptor molecule. PSI then transfers electrons to ferrodoxin which in turn gives electrons to carrier molecule NADP+ forming energy storage molecule NADPH. ATP is produced through electron transport chain by the process of chemiosmosis.
Activated electrons are “transported” from one molecule to another along the thylakoid membrane.
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