Table of Contents
Where do light reactions produce ATP?
thylakoid membranes
The light-dependent reaction is a photochemical reaction taking place in the thylakoid membranes of chloroplasts, where light energy is transformed into adenosine triphosphate (ATP) and nicotinamide adenine dinucleotide phosphate (NADPH).
How many ATP are produced in the light reaction?
The nine molecules of ATP and six molecules of NADPH come from the light reactions.
How is ATP produced in light reactions quizlet?
The Light Reactions of Photosynthesis. Light is absorbed and the energy is used to drive electrons from water to generate NADPH and to drive protons across a membrane. These protons return through ATP synthase to make ATP.
How is ATP produced in chloroplasts?
All electron-transport processes occur in the thylakoid membrane: to make ATP, H+ is pumped into the thylakoid space, and a backflow of H+ through an ATP synthase then produces the ATP in the chloroplast stroma.
What does the ATP produced during the light-independent reactions?
This part of the light-independent reactions is referred to as carbon fixation. Then, the energy carriers from the light-dependent reactions make their contribution. ATP and NADPH give each 3-phosphoglycerate a hydrogen atom, creating two molecules of the simple sugar G3P (glyceraldehyde-3-phosphate).
How is 18 ATP produced in light reactions?
The light-dependent reactions convert light energy into chemical energy, producing ATP and NADPH. The light-dependent reactions can be summarized as follows: 12 H2O + 12 NADP+ + 18 ADP + 18 Pi + light and chlorophyll yields 6 O2 + 12 NADPH + 18 ATP.
How is ATP made during photosynthesis quizlet?
Explain how ATP is generated during photosynthesis. Sunlight energy is used to split water molecules into H+ and e-. The H+ goes into the thylakoid, creating a concentration difference. As the H+ diffuses out, it goes through the channel/enzymatic protein ATP synthase, providing the energy to synthesize ATP.
What is produced during the light reaction?
During the light-dependent stage (“light” reactions), chlorophyll absorbs light energy, which excites some electrons in the pigment molecules to higher energy levels; these leave the chlorophyll and pass along a series of molecules, generating formation of NADPH (an enzyme) and high-energy ATP molecules.
Is ATP produced in light-independent reactions?
The goal of the light-dependent reactions of photosynthesis is to collect energy from the sun and break down water molecules to produce ATP and NADPH. These two energy-storing molecules are then used in the light-independent reactions….
| Goal | Convert light energy into chemical energy |
|---|---|
| Output | NADPH, ATP, O2 |
What is produced at the end of the light reactions?
At the end of the light reactions, the energy from sunlight is transferred to NADP+, producing NADPH. This energy in NADPH is then used in the Calvin cycle.
What happens during light-independent reactions?
In the light-independent reactions or Calvin cycle, the energized electrons from the light-dependent reactions provide the energy to form carbohydrates from carbon dioxide molecules. The light-independent reactions are sometimes called the Calvin cycle because of the cyclical nature of the process.
Which process occurs during a light-independent reaction?
2) Calvin cycle, light independent reaction. Takes place on the stroma, inside the chloroplast. There are many enzymes in the chloroplast that aid to form starch by photosynthesis. The energy stored is transferred to the stroma and with the other raw materials chains of carbohydrate molecules are produced.
How many ATP and ADP are produced in light reaction?
In light reaction ATP and reduced coenzymes NADPH2 are synthesized, which are used in dark reaction to produce sugars. 3 ATP molecules and 2 NADPH2 molecules are required to fix one molecule of carbon dioxide in Calvin cycle.
Is ATP produced in photosystem 1 or 2?
This is accomplished by the use of two different photosystems in the light reactions of photosynthesis, one to generate ATP and the other to generate NADPH. Electrons are transferred sequentially between the two photosystems, with photosystem I acting to generate NADPH and photosystem II acting to generate ATP.
What is produced during the light reaction quizlet?
The light reactions produce carbon dioxide, ATP, NADPH, all of which are used in the Calvin cycle. The light reactions produce ATP and NADPH, both of which are used in the Calvin cycle.
Which molecules are produced during the light reactions of photosynthesis quizlet?
The light reactions produce chemical energy in the form of NADPH and ATP.
What is one role of ATP in the light-independent reaction of photosynthesis?
What is one role of ATP in the light-independent reaction of photosynthesis? ATP supplies the energy to produce glucose and other carbohydrates.
How does an electron transport chain lead to the generation of ATP in the light-dependent reactions of photosynthesis?
The movement of electrons down the electron transport chain drives the formation of a protons gradient that is used to make ATP. d. The electron transport chain directly absorbs light energy and transforms it into the chemical energy of ATP.
What is produced in the light-independent reaction?
Light-independent reaction is a series of biochemical reactions in photosynthesis not requiring light to proceed, and ultimately produce organic molecules from carbon dioxide. The energy released from ATP (produced during the light reactions) drives this metabolic pathway.
What enzyme helps produce ATP in the light reaction?
Triose phosphate isomerase converts all of the G3P reversibly into dihydroxyacetone phosphate (DHAP),also a 3-carbon molecule.
What is the reaction that produces ATP called?
The production of ATP is called the process of cellular respiration. Cellular respiration is the process that releases energy in the form of glucose. Here are three steps before the ATP is created in the mitochondria. The first step is called Glycolysis.
What is the reaction that produces ATP?
Glycolysis. This is the first pathway of the human respiration.
What is the role of ATP in light dependent reaction?
light dependent reaction and light independent reaction. -ATP is used in active transport a d protein synthesis. – So LIR slows down reducing the anoumt of GP being reduced to TP. What role does light play in photosynthesis? – Used in photoionisation of chlorophyll causing the electrons to become excited