What is the structure and function of the chloroplast?

A chloroplast is an organelle unique to plant cells that contains chlorophyll (which is what makes plants green) and is responsible for enabling photosynthesis to occur so that plants can convert sunlight into chemical energy.

Hereof, what is the function of the chloroplast?

The organelles are only found in plant cells and some protists such as algae. Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells. The entire process is called photosynthesis and it all depends on the little green chlorophyll molecules in each chloroplast.

What is the chloroplast and its function?

The role of chloroplasts in photosynthesis is mainly to contain most of the reaction during photosynthesis. The plant will pump water into the leaves, and the leaves will also absorb carbon dioxide. All of the thylakoids, chlorophyll, water, carbon dioxide, etc. are available inside the chloroplast.

What is the job of the chloroplast?

Chloroplasts are organelles found in plant cells and eukaryotic algae that conduct photosynthesis. Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant. In this respect they are similar to mitochondria, but are found only in plants and protista.

What are the structures that make up the chloroplast?

Chloroplasts are organelles located in a plant which help plants absorb sunlight and complete the process of photosynthesis. Chloroplasts structures include: membrane envelope, thylakoid membrane, grana, stroma, and chlorophyll.

Why are chloroplast green in color?

Chlorophyll is a pigment found in the thylakoid membranes of the chloroplasts in the leaves. This is why plants are green. The simple answer is that plants are green because they have green chloroplasts (organelles that carry out photosynthesis). Chlorophyll is a pigment that absorbs red and blue light.

Where does photosynthesis occur in the chloroplast?

Photosynthesis consists of both light-dependent reactions and light-independent reactions. In plants, the so-called “light” reactions occur within the chloroplast thylakoids, where the aforementioned chlorophyll pigments reside.

How many Thylakoids are in a chloroplast?

In higher plants thylakoids are organized into a granum-stroma membrane assembly. A granum (plural grana) is a stack of thylakoid discs. Chloroplasts can have from 10 to 100 grana. Grana are connected by stroma thylakoids, also called intergranal thylakoids or lamellae.

What is the function of the Chromoplast?

Chromoplasts are found in fruits, flowers, roots, and stressed and aging leaves, and are responsible for their distinctive colors. This is always associated with a massive increase in the accumulation of carotenoid pigments. The conversion of chloroplasts to chromoplasts in ripening is a classic example.

How many membranes are in a chloroplast?

The outer two membranes are similar in structure and orientation to the nuclear membranes: there is an outer membrane, an inner membrane, and a very small space between them called the—you guessed it!—intermembrane space. The third chloroplast membrane is arranged in discs called thylakoids.

What is the definition of chloroplast in biology?

Chloroplast is the combination of two biological terms, plastid (an organelle in a plant cell), and chloros, which means green. If you’re reading about plant biology, you’ll probably recognize chloros in chlorophyll, which is one of the pigments important to photosynthesis, which takes place in chloroplasts.

Where do the light reactions take place in the chloroplast?

The chloroplast is involved in both stages of photosynthesis. 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.

What are the two main stages of 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.

What is the chemical formula of photosynthesis?

The equation for photosynthesis states that the combination of carbon dioxide, water and light energy produces a carbohydrate (glucose) and oxygen. The chemical formula is 6CO2 + 6H2O + light energy = C6H12O6 + 6O2.

Why is it important for plants to have chloroplasts and mitochondria?

Chloroplasts are present in photosynthetic plants and is responsible for making the food of the plant. On the other hand, mitochondria also known as the power house of the cell, uses this oxygen in order to create ATP which is used for various purposes like active transport, releasing minerals and many more in plants.

What does a cytoplasm do?

The jelly-like fluid that fills a cell is called cytoplasm. It is made up of mostly water and salt. Cytoplasm is present within the cell membrane of all cell types and contains all organelles and cell parts. Cytosol is the part of the cytoplasm that does not contain organelles.

What are the reactants and products of photosynthesis?

A chemical equation is written below which summarizes the reactants and products of the photosynthesis pathway. The equation shows that carbon dioxide and water are used with light energy to produce glucose sugar and oxygen gas.

Where does the light reaction take place?

In photosynthesis, the light-dependent reactions take place on the thylakoid membranes. The inside of the thylakoid membrane is called the lumen, and outside the thylakoid membrane is the stroma, where the light-independent reactions take place.

What is the main function of the Golgi apparatus?

The Golgi apparatus is an organelle present in most eukaryotic cells. It is made up of membrane-bound sacs, and is also called a Golgi body, Golgi complex, or dictyosome. The job of the Golgi apparatus is to process and bundle macromolecules like proteins and lipids as they are synthesized within the cell.

What is the job of the chloroplast?

Chloroplasts are organelles found in plant cells and eukaryotic algae that conduct photosynthesis. Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant. In this respect they are similar to mitochondria, but are found only in plants and protista.

Who discovered the chloroplast?

This origin of chloroplasts was first suggested by the Russian biologist Konstantin Mereschkowski in 1905 after Andreas Schimper observed in 1883 that chloroplasts closely resemble cyanobacteria. Chloroplasts are only found in plants, algae, and the amoeboid Paulinella chromatophora.

What are the functions of chloroplast?

Animal cells do not have chloroplasts. Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells. The entire process is called photosynthesis and it all depends on the little green chlorophyll molecules in each chloroplast. Plants are the basis of all life on Earth.

What does a chloroplast look like?

Chloroplasts have two membranes. Inside, there are little disks known as thylakoids, which carry out part of photosynthesis. The inside of thylakoids is called lumen. Stacks of thylakoids are known as granum, and the space outside of the granum is the stroma, which is where the rest of photosynthesis occurs.

Leave a Comment