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Jan 29, 2024 · A chloroplast is a type of organelle known as a plastid, predominantly found in plant cells and algae. It is the site of photosynthesis, a process where light energy is converted into chemical energy , fueling the organism’s activities.
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Chloroplast is a small specialised cell organelle present only in plant cell and few algal cells. Explore the chloroplast structure and function only at BYJU'S.
- In all green plants, photosynthesis takes place within the thylakoid membrane of the Chloroplast.
- Chloroplasts are cell organelles present only in a plant cell and it includes: Stroma Inner membrane Outer membrane Thylakoid membrane Intermembran...
- The most important function of chloroplast is the production of food by the process of photosynthesis.
- Chloroplast contains a green pigment called chlorophyll which gives it a green colour.
- There are three types of plastids-chloroplast, chromoplast and leucoplast.
- The stack of lamellae or thylakoids inside a plastid is called grana.
microbenotes.com · chloroplasts-structure-andChloroplasts: Definition, Structure, Functions, Diagram
- Chloroplast Morphology
- Types of Pigments
- Structure of Chloroplasts
- Semi-Autonomous Nature of Chloroplast
- Functions of Chloroplasts
- References
Its size and shape vary from species to species. In higher plants chloroplast are generally biconvex or planoconvex.However, in different plant cells, it may have various shapes such as filamentous, saucer, ovoid, discoid, spheroid, star-like girdle-shaped, spiral ribbon-like, reticulate, or cup-shaped.The size of the chloroplast is generally measured at about 5-10 µm in diameter and 2-3 µm in thickness.The chloroplast of cells of polyploid and shade plants are comparatively larger than the chloroplast of cells of diploid and sun plants.ChlorophyllThe chlorophyll consists of 75% of chlorophyll a and 25% of chlorophyll b.The chlorophyll absorbs energy from sunlight and the synthesis of food molecules in the chloroplast.CarotenoidsCarotenoids are the pigments present in chlorophylls which are located in the thylakoid membrane. Pigments like yellow and orange are present in it.Chloroplasts found in higher plants are generally biconvex or planoconvex shaped.In different plants, however, chloroplasts may have different shapes, varying from spheroid, filamentous saucer-shaped, discoid or ovoid-shaped.They can be found in the cells of the mesophyll in plant leaves. They are vesicular and have a colorless center.The average size of the chloroplast is 4-6 µ in diameter and 1-3 µ in thickness.Like the mitochondria, they are also known as semi-autonomous cell organellesas they have their DNA and complete machinery to synthesize some of the required proteins.While some other proteins depend upon nuclear DNA and cytoplasmic ribosomes.Chloroplast and mitochondriaare the only two organelles having their DNA.Chloroplasts are the sites for photosynthesis, which comprises a set of light-dependent and light-independent reactions to harness solar energy and convert it into chemical energy.The components of chloroplast participate in several regulatory functions of the cell as well as in photorespiration.Chloroplasts also provide diverse metabolic activities for plant cells, including the synthesis of fatty acids, membrane lipids, isoprenoids, tetrapyrroles, starch, and hormones.Plants lack specialized immune cells—all plant cells participate in the plant response.Verma, P. S., & Agrawal, V. K. (2006). Cell Biology, Genetics, Molecular Biology, Evolution & Ecology (1 ed.). S .Chand and company Ltd.Stephen R. Bolsover, Elizabeth A. Shephard, Hugh A. White, Jeremy S. Hyams(2011). Cell Biology: A short Course (3 ed.).Hoboken,NJ: John Wiley and Sons.Alberts, B. (2004). Essential cell biology. New York, NY: Garland Science Pub.https://biologywise.com/chloroplast-structure-functionApr 27, 2017 · Chloroplast Definition. The chloroplast, found only in algal and plant cells, is a cell organelle that produces energy through photosynthesis. The word chloroplast comes from the Greek words khloros, meaning “green”, and plastes, meaning “formed”.
www.ducksters.com · biology · cell_chloroplastsBiology for Kids: Plant Cell Chloroplasts - Ducksters
Biology. Plant Cell Chloroplasts. What are chloroplasts? Chloroplasts are unique structures found in plant cells that specialize in converting sunlight into energy that plants can use. This process is called photosynthesis. Organelle. Chloroplasts are considered organelles in plant cells.
Jun 24, 2019 · Chloroplasts are tiny plant powerhouses that capture light energy to produce the starches and sugars that fuel plant growth. They are found inside plant cells in plant leaves and in green and red algae as well as in cyanobacteria.
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