Question

Briana is studying a model of the light-dependent reactions of photosynthesis. The diagram shows a part of this model.

A ray of light strikes photosystem II. A chemical equation shows that 2 water molecules (H2O) break apart to release 4 hydrogen ions, an oxygen molecule, and 4 electrons.

Briana notices the electrons that the water molecules release. She asks, "Will the electrons build up in the chloroplast?" Which addition to the diagram would be most useful for answering Briana's question?

A. a wavy arrow that shows Photosystem I
B. an equation for the chemical reaction that forms water from hydrogen ions, electrons, and oxygen molecules
C. an arrow that shows the electrons moving through electron carriers, and received by NADP+
D. an equation for the chemical reaction that forms hydrogen gas from hydrogen ions and electrons

Answer 1

(Option C), an arrow showing the electrons being transferred to NADP+, would best explain the movement of electrons in photosynthesis, proving that they do not build up in the chloroplast.

Step-by-step explanation:

The student named Briana is studying the light-dependent reactions of photosynthesis and is curious about what happens to the electrons released by water molecules after they are excited by sunlight in photosystem II (PSII). To answer Briana's question, the best addition to the diagram would be (Option C). an arrow that shows the electrons moving through electron carriers, and received by NADP+. This showcases the path that electrons take through the electron transport chain to photosystem I (PSI), which reduces NADP+ to NADPH. In this process, the electrons do not build up within the chloroplast; instead, they are used in the production of NADPH, which, along with ATP, are essential energy carriers for the light-independent reactions of photosynthesis.

Answer 2

The answer is not A, thanks "verified tutor".

Step-by-step explanation: