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2021-05-17

Why is the dark reaction dependent on the light reaction?

Why is the dark reaction dependent on the light reaction?

The Calvin cycle is also called the dark reactions or light-independent reactions because it’s the part that doesn’t need energy from the sun to happen. So although the cycle itself doesn’t use light energy, it does depend on the light reactions to provide it with the ATP and NADPH.

Can light dependent reactions occur in the dark?

No. As the title says, light-dependent reactions are dependent on light to occur. The purpose of these structures is to absorb light in turn exciting the electrons that make them up. At a point, the electrons gain so much kinetic energy that they will leave the Photosystem and pass through the electron transport chain.

Where does light reaction and dark reaction occur?

The light reaction takes place in the thylakoid discs. There, water (H20) is oxidized, and oxygen (O2) is released. The electrons freed up from water are transfered to ATP and NADPH. The dark reaction occurs outside of the thylakoids.

What are the products of light-dependent reactions Why are they important?

Figure 8.6. 1: The light-dependent reactions of photosynthesis (left) convert light energy into chemical energy, forming ATP and NADPH. These products are used by the light-independent reactions to fix CO2, producing organic carbon molecules.

What happens to oxygen produced by 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 reactants are used in light dependent reactions?

The reactants in the light-dependent chemical reaction are adenosine diphosphate (ADP), oxydized nicotinamide adenine dinucleotide phosphate (NADP+) and the hydrogen in water.

What are the products of the light-dependent reactions of photosynthesis quizlet?

The light-dependent reactions produce oxygen gas and convert ADP and NADP+ into the carriers ATP and NADPH. ATP and NADPH provide the energy needed to build high-energy sugars from low-energy carbon dioxide.

What is the primary function of the light reactions of photosynthesis?

The overall function of light-dependent reactions, the first stage of photosynthesis, is to convert solar energy into chemical energy in the form of NADPH and ATP, which are used in light-independent reactions and fuel the assembly of sugar molecules.

What substances are reactants in photosynthesis?

Summary. The photosynthesis chemical equation states that the reactants (carbon dioxide, water and sunlight), yield two products, glucose and oxygen gas.