Process of photosynthesis

Now that we know what plants need to make food, we can add that information as shown below. This is why we are able to eat carrots, potatoes, apples, water melons and all the others. Photosynthesis is the process by which plants make their own food. The thylakoids appear as flattened disks.

For example, in green plants, the action spectrum resembles the absorption spectrum for chlorophylls and carotenoids with absorption peaks in violet-blue and red light. And the dark reactions, for most plants we talk about, it's called the Calvin Cycle.

This is where we get all of our fuel. To make food, plants need not just one but all of the following: These pigments are embedded in plants and algae in complexes called antenna proteins.

The fixation or reduction of carbon dioxide is a process in which carbon dioxide combines with a five-carbon sugar, ribulose 1,5-bisphosphateto yield two molecules of a three-carbon compound, glycerate 3-phosphatealso known as 3-phosphoglycerate.

During these reactions light energy is converted to chemical energy. The energy changes accompanying the two sets of changes make a Z shape when drawn out. Such a combination of proteins is also called a light-harvesting complex.

Decarboxylation of malate during the day releases CO2 inside the leaves, thus allowing carbon fixation to 3-phosphoglycerate by RuBisCO. In red algae, the action spectrum is blue-green light, which allows these algae to use the blue end of the spectrum to grow in the deeper waters that filter out the longer wavelengths red light used by above ground green plants.

What happens during Photosynthesis. Well, I've almost written it here. The thylakoid itself is enclosed by the thylakoid membrane, and within the enclosed volume is a lumen or thylakoid space.

Many important crop plants are C4 plants, including maize, sorghum, sugarcane, and millet. Water enters the root and is transported up to the leaves through specialized plant cells known as xylem vessels. The hydrogen ions released contribute to the transmembrane chemiosmotic potential that leads to ATP synthesis.

During the 20th century, comparisons between photosynthetic processes in green plants and in certain photosynthetic sulfur bacteria provided important information about the photosynthetic mechanism.


And you're probably reasonably familiar with the idea. Chlorophyll is actually quite a varied compound. Here is the process in greater detail: These pores are called stomata. They cannot cross the membrane as they are charged, and within the cytosol they turn back into CO2 very slowly without the help of carbonic anhydrase.

So photosynthesis, you start with photons. Those will be the next two videos I make. So this right here isn't so different than what I wrote up here in my first overview of how we always imagined photosynthesis in our heads.

While the mitochondrion has two membrane systems, the chloroplast has three, forming three compartments. The raw materials of photosynthesis, water and carbon dioxide, enter the cells of the leaf, and the products of photosynthesis, sugar and oxygen, leave the leaf.

In addition to glucose, plants also produce oxygen.

Part II: The Chloroplast

CAM plants store the CO2 mostly in the form of malic acid via carboxylation of phosphoenolpyruvate to oxaloacetate, which is then reduced to malate. Within this cell organelle is the chlorophyll that captures the light from the Sun.

Animals obtain energy from eating plants. I have a whole discussion on the biological versus chemistry view of oxidation, but it's the same idea. You just have this P there. The physical separation of RuBisCO from the oxygen-generating light reactions reduces photorespiration and increases CO2 fixation and, thus, the photosynthetic capacity of the leaf.

In addition, this creates a proton gradient energy gradient across the chloroplast membranewhich is used by ATP synthase in the synthesis of ATP.

The chloroplast is enclosed by a membrane. What is needed for Photosynthesis. In the case of green plants, they do not absorb light from the green range.

Photosynthesis for Kids

Sep 08,  · Photosythesis is a process that happens in all plants and is used to make the plants food and here are the 1 starts with a healthy green leaf full of chlorapyll,st ep 2 the plant.

Photosynthesis: This is the process of making glucose—which cells use as an energy source—from sunlight energy, water and carbon dioxide.

Photosynthesis for Kids

Only plant cells can do this, and the special organelle in the plant cells that can do through this process is called a chloroplast. The process of photosynthesis is divided into two main parts: light dependent reactions and light independent or dark reactions.

The light dependent reaction happens when solar energy is captured to make a molecule called ATP (adenosine triphosphate). Aug 19,  · Photosynthesis is the process used by the plants to make their food. In simpler terms, conversion of light energy into chemical energy by plants is called photosynthesis.


Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities. In summary, photosynthesis is a process in which light energy is converted to chemical energy and used to produce organic compounds.

In plants, photosynthesis typically occurs within the chloroplasts located in plant leaves.

Process of photosynthesis
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Photosynthesis for Kids