Metabolic pathways can be broadly divided into two categories based on their effects. Photosynthesis, which builds sugars out of smaller molecules, is a “building up,” or anabolic, pathway. In contrast, cellular respiration breaks sugar down into smaller molecules and is a “breaking down,” or catabolic, pathway.
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. Chlorophyll is found in chloroplasts in plant cells , particularly the palisade and spongy mesophyll cells .
Is photosynthesis endergonic or exergonic reaction?
Photosynthesis is an endergonic process. Photosynthesis takes in energy and uses it to build carbon compounds.
What are the two types of metabolic reactions?
Metabolic reactions can be catabolic (directed toward the breakdown of larger molecules to produce energy), or anabolic (directed toward the energy‐consuming synthesis of cellular components from smaller molecules).
Is photosynthesis a combustion reaction?
This process in known as Combustion. Combustion is a chain reaction chemically similar to photosynthesis in reverse. Photosynthesis requires a large amount of heat which is furnished by the sun. The Combustion process releases this heat.
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 photosynthesis the most important chemical reaction?
Photosynthesis is the process by which organisms convert light energy into chemical energy. … Photosynthesis is the single most important process on earth, for without it neither plants nor animals (including humans) could survive.
Is osmosis Endergonic or Exergonic?
Active transport is the other class of transport systems that do require energy from the cell, usually in the form of ATP, do not occur spontaneously (endergonic reaction). Diffusion, osmosis, and facilitated diffusion are all types of passive transport.
Is photosynthesis oxidation or reduction?
1 Answer. Photosynthesis involves oxidation and reduction by oxidizing the oxygen in water and reducing the carbon in carbon dioxide.
What is Endergonic vs Exergonic?
In the exergonic reaction, the reactants are at a higher free energy level than the products (reaction goes energetically downhill). In the endergonic reaction reaction, the reactants are at a lower free energy level than the products (reaction goes energetically uphill).
What is an example of a metabolic reaction?
An example of a metabolic reaction is the one that takes place when a person eats a spoonful of sugar. Once inside the body, sugar molecules are broken down into simpler molecules with the release of energy. … Catabolism is the process by which large molecules are broken down into smaller ones with the release of energy.
What is an example of a metabolic process?
The processes of making and breaking down glucose molecules are both examples of metabolic pathways. … In contrast, cellular respiration breaks sugar down into smaller molecules and is a “breaking down,” or catabolic, pathway. Anabolic pathway: small molecules are assembled into larger ones. Energy is typically required.
What are the 3 metabolic types?
There are three basic metabolism types: ectomorph, mesomorph, and endomorph – definitely words you probably don’t use in your normal, day-to-day conversations.
What is a combustion reaction?
Combustion is the scientific word for burning. In a combustion reaction a substance reacts with oxygen from the air and transfers energy to the surroundings as light and heat. The products of a combustion reaction are called oxides.
Why is photosynthesis not reversible?
Photosynthesis is irreversible because the enzymes are highly specific for their substrate (reactants). Many enzymes are unable to facilitate the reverse reaction.
What type of reaction is photosynthesis and respiration?
Carbon fixation is an endothermic redox reaction. In general outline, photosynthesis is the opposite of cellular respiration: while photosynthesis is a process of reduction of carbon dioxide to carbohydrate, cellular respiration is the oxidation of carbohydrate or other nutrients to carbon dioxide.