What type of reaction is photosynthesis?

Photosynthesis is an endothermic reaction. This means it cannot occur without energy (from the Sun). The light required is absorbed by a green pigment called chlorophyll in the leaves.

Is photosynthesis a coupled reaction?

Explanation: Photosynthesis is a complex set of enzyme-catalyzed reactions that use carbon dioxide (CO2), water (H2O) and light energy to create glucose (C6H12O6) and oxygen gas (O2). In this way, these two reactions are coupled.

What are the 2 kinds of reaction in photosynthesis?

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.

Is energy released in photosynthesis?

In photosynthesis, solar energy is harvested as chemical energy in a process that converts water and carbon dioxide to glucose. Oxygen is released as a byproduct. In cellular respiration, oxygen is used to break down glucose, releasing chemical energy and heat in the process.

What is energy coupling?

energy coupling: Energy coupling occurs when the energy produced by one reaction or system is used to drive another reaction or system. endergonic: Describing a reaction that absorbs (heat) energy from its environment. exergonic: Describing a reaction that releases energy (heat) into its environment.

Does photosynthesis produce ATP?

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.

What are the 2 types of reactions?

Types of Chemical Reactions

Synthesis reactions. Two or more reactants combine to make 1 new product.
Decomposition reactions. A single reactant breaks down to form 2 or more products.
Single-replacement reactions.
Double-replacement reactions.
Combustion reactions.

What are the two sets of reactions for photosynthesis quizlet?

What are the two sets of reactions involved in photosynthesis? The Light reactions and the Calvin Cycle.

How much energy is released in photosynthesis?

The part of the solar spectrum used by plants has an estimated mean wavelength of 570 nm; therefore, the energy of light used during photosynthesis is approximately 28,600/570, or 50 kcal per einstein.

How is energy involved in 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.

What kind of reaction is photosynthesis in all of its?

Photosynthesis in its entirety is an anabolic, nonspontaneous (endergonic) process driven by energy captured from sunlight. In… See full answer below. Our experts can answer your tough homework and study questions. Photosynthesis is how plants make food.

What happens during light independent stage of photosynthesis?

Photosynthesis occurs in two stages. In the first stage, light-dependent reactions or light reactions capture the energy of light and use it to make the energy-storage molecules ATP and NADPH. During the second stage, the light-independent reactions use these products to capture and reduce carbon dioxide.

How are protons converted to chemical energy in photosynthesis?

This produces a proton gradient more directly, which is then converted to chemical energy. The process does not involve carbon dioxide fixation and does not release oxygen, and seems to have evolved separately from the more common types of photosynthesis.

Which is the opposite of cellular respiration in photosynthesis?

Overview. Carbon fixation is an endothermic redox reaction. In general outline, photosynthesis is the opposite of cellular respiration: while photosyntesis is a process of reduction of carbon dioxide to carbohydrate, cellular respiration is the oxidation of carbohydrate or other nutrients to carbon dioxide.