What Occurs During The Light Reactions Of Photosynthesis

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What Occurs During The Light Reactions Of Photosynthesis?

Photosynthesis begins with the light reactions. … The energy is then temporarily transferred to two molecules ATP and NADPH which are used in the second stage of photosynthesis. ATP and NADPH are generated by two electron transport chains. During the light reactions water is used and oxygen is produced.May 24 2021

What happens in the light reactions of photosynthesis quizlet?

(In the light reactions the energy of sunlight is used to oxidize water (the electron donor) to O2 and pass these electrons to NADP+ producing NADPH. Some light energy is used to convert ADP to ATP. The NADPH and ATP produced are subsequently used to power the sugar-producing Calvin cycle.)

What three reactions occur during the light reactions in photosynthesis?

Figure 1. Light reactions harness energy from the sun to produce chemical bonds ATP and NADPH. These energy-carrying molecules are made in the stroma where carbon fixation takes place. The light-independent reactions of the Calvin cycle can be organized into three basic stages: fixation reduction and regeneration.

What occurs during the light reaction?

Photosynthesis begins with the light reactions. It is during these reactions that the energy from sunlight is absorbed by the pigment chlorophyll in the thylakoid membranes of the chloroplast. … During the light reactions water is used and oxygen is produced.

What three reactions occur during the light reactions in photosynthesis quizlet?

Terms in this set (12)

Absorption of light energy.
Conversion of light energy into chemical energy.
hStorage of chemical energy in the form of sugars.

Which of the following occurs during the light-dependent reactions?

In the light-dependent reactions which take place at the thylakoid membrane chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water. The light-dependent reactions release oxygen as a byproduct as water is broken apart.

What is produced during the light reaction quizlet?

In the light reactions the energy of sunlight is used to oxidize water (the electron donor) to O2 and pass these electrons to NADP+ producing NADPH. Some light energy is used to convert ADP to ATP. The NADPH and ATP produced are subsequently used to power the sugar-producing Calvin cycle.

What process occurs during the light-independent reactions of photosynthesis quizlet?

Photosynthesis uses the energy of sunlight to convert water and carbon dioxide (reactants) into high-energy sugars and oxygen (products). … light-independent reactions in which ATP and NADPH from the light-dependent reactions are used to produce high-energy sugars.

Which process occurs during photosynthesis quizlet?

What happens during the process of photosynthesis? In the process of photosynthesis plants convert the energy of sunlight into chemical energy stored in the bonds of carbohydrates.

What is light reactions quizlet?

light reactions. the initial reactions in photosynthesis which are triggered by the absorption of light by photosystems I and II and include the passage of electrons along the electron transport chains the. > makes NADPH oxygen gas and ATP. chloroplast.

Which of the following is produced during light phase of photosynthesis?

Light reactions need light to produce organic energy molecules. They are initiated by colored pigments mainly green colored chlorophylls. Light reaction occurs inside thylakoids. The function of this phase is to produce NADPH and energy-rich ATP molecules.

What are the light-dependent and light independent reactions of photosynthesis?

In the light-dependent reactions energy from sunlight is absorbed by chlorophyll and that energy is converted into stored chemical energy. In the light-independent reactions the chemical energy harvested during the light-dependent reactions drives the assembly of sugar molecules from carbon dioxide.

What occurs in the light-independent reactions quizlet?

The light-independent reactions of photosynthesis are chemical reactions that convert carbon dioxide and other compounds into glucose. These reactions occur in the stroma the fluid-filled area of a chloroplast outside of the thylakoid membranes.

Which events take place in light-dependent reactions of photosynthesis?

The light-dependent reactions release oxygen as a byproduct as water is broken apart. In the Calvin cycle which takes place in the stroma the chemical energy derived from the light-dependent reactions drives both the capture of carbon in carbon dioxide molecules and the subsequent assembly of sugar molecules.

What is produced by the light-dependent reactions of photosynthesis and used in the Calvin cycle quizlet?

What is the purpose of each phase? -The purpose of the light-dependent reactions is to use water and light to produce ATP and NADPH or energy that the cell can use. -The Calvin Cycle uses the energy produced in ATP and NADPH to produce glucose.

What occur during photosynthesis?

During the process of photosynthesis cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. … Then via respiration processes cells use oxygen and glucose to synthesize energy-rich carrier molecules such as ATP and carbon dioxide is produced as a waste product.

What process occurs during photosynthesis?

photosynthesis the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants light energy is captured and used to convert water carbon dioxide and minerals into oxygen and energy-rich organic compounds.

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What is the function of a chloroplast during the light reactions quizlet?

The chloroplasts’ membranous sacs (thylakoids) are the site of photosynthetic light reactions and involves the transfer of electrons from a photoexecuted state from the chlorophyll inside the thylakoid membranes to the stroma which then produces ATP.

What is produced in the light reaction that is used in the carbon reactions of photosynthesis quizlet?

The light reactions produce ATP while the carbon reactions consume it. The carbon reactions produce ATP and NADPH. Without photosynthesis autotrophs would be more abundant.

What is the definition of light reaction in biology?

: the phase of photosynthesis that requires the presence of light and that involves photophosphorylation.

Which is produced during light phase?

This reaction takes place through several steps in two stages: the light phase and the dark phase. In the light phase energy from light powers reactions that split water to release oxygen. In the process high-energy molecules ATP and NADPH are formed. The chemical bonds in these compounds store the energy.

During which phase of photosynthesis is light used?

light-dependent reactions

The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions). Light-dependent reactions which take place in the thylakoid membrane use light energy to make ATP and NADPH.

Where does light reaction take place?

the chloroplast
The light reaction occurs in the thylakoids of the chloroplast. When the light hits chlorophyll a get excited to higher energy state followed by a series of reactions. This energy is converted into energy molecules ATP and NADPH by using PS I and PS II.

Do light reactions depend on the Calvin cycle?

The Calvin cycle refers to the light-independent reactions in photosynthesis that take place in three key steps. Although the Calvin Cycle is not directly dependent on light it is indirectly dependent on light since the necessary energy carriers ( ATP and NADPH) are products of light-dependent reactions.

What happens during the light independent reaction?

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. … After the energy is transferred the energy carrier molecules return to the light-dependent reactions to obtain more energized electrons.

Where does the light independent reaction occur *?

stroma

The light-independent reactions represent the known Calvin–Benson–Bassham (CBB) cycle which takes place in the stroma of chloroplasts and is the primary pathway of carbon fixation of C3 plants [119]. The CBB cycle proceeds in three main stages: carboxylation reduction and regeneration.

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What two substances are produced by the light-dependent reactions that are required for the light-independent reactions?

The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier NADPH.

What molecules are produced during the light-independent reactions?

The endergonic light-independent reactions of photosynthesis use the ATP and NADPH synthesized during the exergonic light-dependent reactions to provide the energy for the synthesis of glucose and other organic molecules from inorganic carbon dioxide and water.

What are the two products of the light reactions that are needed for the Calvin cycle?

What two products of the light reactions are used up in the calvin cycle? NADPH which is an electron carrier and can be reused and ATP or ADP which is an energy molecule that can be rebuilt in another light reaction.

What is the role of light in photosynthesis?

Light provides energy for the synthesis of glucose from carbon dioxide and water during photosynthesis. … During light reaction the chlorophyll entraps light and the solar energy is converted into chemical energy in the form of ATP molecules. This can happen because light energy is used to split water.

What happens during photosynthesis Autotrophs?

In photosynthesis autotrophs use energy from the sun to convert water from the soil and carbon dioxide from the air into a nutrient called glucose. Glucose is a type of sugar. The glucose gives plants energy. Plants also use glucose to make cellulose a substance they use to grow and build cell walls.

What are the 7 steps of photosynthesis?

Terms in this set (7)

Step 1-Light Dependent. CO2 and H2O enter the leaf.
Step 2- Light Dependent. Light hits the pigment in the membrane of a thylakoid splitting the H2O into O2.
Step 3- Light Dependent. The electrons move down to enzymes.
Step 4-Light Dependent. …
Step 5-Light independent. …
Step 6-Light independent. …
calvin cycle.

What are the 3 stages of photosynthesis?

The stages of photosynthesis

Stage	Location	Events
Light-dependent reactions	Thylakoid membrane	Light energy is captured by chloroplasts and stored as ATP
Calvin cycle	Stroma	ATP is used to create sugars that the plant will use to grow and live

How does chlorophyll absorb light?

In photosynthesis electrons are transferred from water to carbon dioxide in a reduction process. Chlorophyll assists in this process by trapping solar energy. When chlorophyll absorbs energy from sunlight an electron in the chlorophyll molecule is excited from a lower to a higher energy state.