What role does redox play in photosynthesis?
Hint: Redox reactions include many major biological processes. The reduction of carbon dioxide into sugars and oxidation of water into molecular oxygen is involved in photosynthesis. To produce carbon dioxide and water, the reverse reaction, respiration, oxidizes sugars.
How does the structure of the chloroplast affect photosynthesis?
The structure of the chloroplast is adapted to the function it performs: Thylakoids – flattened discs have a small internal volume to maximise hydrogen gradient upon proton accumulation. Lamellae – connects and separates thylakoid stacks (grana), maximising photosynthetic efficiency.
What is the function of chloroplast in photosynthesis?
Chloroplasts are plant cell organelles that convert light energy into relatively stable chemical energy via the photosynthetic process. By doing so, they sustain life on Earth.
What is the structure and function of chloroplast?
Chloroplasts are a type of membrane-bound plastids that contain a network of membranes embedded into a liquid matrix and harbor the photosynthetic pigment called chlorophyll. It is this pigment that imparts a green color to plant parts and serves to capture light energy.
What is the main redox reagent of photosynthesis?
In redox reactions in photosynthesis (6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O2), Carbon dioxide is reduced into sugar and water oxidation gives molecular oxygen.
Where does reduction occur in photosynthesis?
The process During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons.
What are the 2 main function of chloroplast?
The main role of chloroplasts is to conduct photosynthesis. They also carry out functions like fatty acid and amino acid synthesis.
What is reduction in photosynthesis?
Water is oxidized in photosynthesis, which means it loses electrons, and carbon dioxide is reduced, meaning it gains electrons.
Why is reduction called reduction?
Ernest Z. In the early days of chemistry, oxidation was defined as a gain of oxygen atoms, and reduction was a loss of oxygen atoms. The Hg was said to be reduced because it lost an oxygen atom.
What happens when chloroplast pigments absorb light?
In plants, the so-called “light” reactions occur within the chloroplast thylakoids, where the aforementioned chlorophyll pigments reside. When light energy reaches the pigment molecules, it energizes the electrons within them, and these electrons are shunted to an electron transport chain in the thylakoid membrane.
How are chloroplasts used in the synthesis of food?
Absorbs light energy and converts it into chemical energy. Chloroplast has a structure called chlorophyll which functions by trapping the solar energy and used for the synthesis of food in all green plants. Produces NADPH and molecular oxygen (O 2) by photolysis of water.
Where are chloroplasts located in the photosynthesis cell?
Chloroplasts are chlorophyll-containing organelles found in plants, algae, and cyanobacteria. Photosynthesis occurs in chloroplasts. Chlorophyll is a green photosynthetic pigment within the chloroplast grana that absorbs light energy for photosynthesis.
Can a chloroplast reproduce independently from the rest of the cell?
Chloroplast has its own DNA and can reproduce independently, from the rest of the cell. They also produce amino acids and lipids required for the production of chloroplast membrane. The chloroplast diagram below represents the chloroplast structure mentioning the different parts of the chloroplast.
What is the purpose of the chloroplast organelle?
Chloroplast Definition “Chloroplast is an organelle that contains the photosynthetic pigment chlorophyll that captures sunlight and converts it into useful energy, thereby, releasing oxygen from water.