Which of the following sequences correctly represents the flow of electrons during photosynthesis? Redox reactions can represent the flow of electrons during photosynthesis. In general, these reactions can be divided into two main categories: those that involve the transfer of electrons from water to carbon dioxide and those that involve the transfer of electrons from organic matter to oxygen.
In the first category, the overall reaction is known as the light reactions of photosynthesis. In this reaction, water molecules are broken down into oxygen and hydrogen by the action of light energy. The electrons released from the water molecules are then used to reduce carbon dioxide molecules to organic matter. Plants can then use this organic matter to create glucose and other carbohydrates.
In the second category, the overall reaction is known as the dark reactions of photosynthesis. In this reaction, organic matter is oxidized by the action of oxygen molecules. The electrons released from the organic matter are then used to reduce carbon dioxide molecules to glucose and other carbohydrates. Plants can then use this glucose to create energy-rich ATP molecules.
The flow of electrons during photosynthesis is an important process that helps to convert light energy into chemical energy. During photosynthesis, electrons are excited by photons from the sun and then transferred from molecule to molecule within the chloroplast. This process ultimately results in the production of oxygen gas and glucose molecules. The flow of electrons during photosynthesis is thus essential for food production and the release of oxygen into the atmosphere.
A. water molecules are split by light energy, releasing oxygen gas and hydrogen ions; the hydrogen ions combine with CO 2 to form sugar
B. water molecules are split by light energy, releasing oxygen gas and hydrogen ions; the hydrogen ions combine with nitrogen to form ammonia
C. water molecules are split by light energy, releasing oxygen gas and electrons; the electrons are used to reduce CO 2 to form sugar
D. water molecules are split by light energy, releasing oxygen gas and electrons; the electrons are used to reduce nitrogen to form ammonia
The correct answer is C. Water molecules are split by light energy, releasing oxygen gas and electrons; the electrons are used to reduce CO2 to form sugar. This is the sequence of events that occurs during photosynthesis.
Light energy is used to split water molecules into oxygen gas and hydrogen ions during photosynthesis. The hydrogen ions combine with CO2 to form sugar, while the electrons are used to reduce CO2 to form sugar. This process results in the production of oxygen gas and glucose.
A) NADPH + H+ → ATP → CO2
B) ADP + Pi → NADPH + H+
C) CO2 + H2O → O2 + ATP
D) Light energy→ chlorophyll→ electron flow→ NADPH + H+
The correct answer is D. Light energy hits the chlorophyll molecules in the thylakoid membranes of the chloroplasts, causing electrons to flow through an electron transport chain. This creates a proton gradient across the thylakoid membrane, which drives the synthesis of ATP from ADP and phosphate. The electrons from NADPH are used to reduce CO2 to sugar in the Calvin Cycle.