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Chloroplasts
Chloroplasts are a part of a plant's cell. They capture energy from light.
1,379 Questions
Where are the chloroplasts in the lettuce leaf cell?
The chloroplasts in a lettuce leaf cell are responsible for color. The chloroplasts are what make lettuce leaves look green.
Why do you think plant cells have chloroplasts and animal cells do not?
chloroplast is a organelle which helps in photosynthesis as it is having chlorophyll pigment responsible for this phenomena and as plant cell need to prepare their own food by photosynthesis so they do have chlorophyll in their cell on the other hand animal cell do not require it as they depend on plants for their food.
Who discovered chloroplast and in which year?
The discovery of chloroplasts should not be confused with the discovery of the operation of chlorophyll. The discovery of chloroplasts as organelles inside plant cells is usually credited to Julius von Sachs (1832-1897), an influential botanist and author of standard botanical textbooks - sometimes called "The Father of Plant Physiology"
His discovery was due in part to the development of more powerful microscopes, which enabled him to see, for the first time into the structure of living plant cells.
"In 1864, Sachs observed grains of starch were being formed in leaves exposed to light. He showed that chlorophyll is not distributed randomly throughout the plant but is located in special bodies (later called chloroplasts) within plant cells. He found that the site where glucose is made is in these bodies and glucose is usually stored as starch."
The evolutionary origins of chloroplasts was a puzzle whose solution was first suggested by Russian botanist Konstantin Mereschcowsky in 1906. Mereschcowsky "coined the term "symbiogenesis" when he observed the symbiotic relationship between fungi and algae (Mereschkowski 1905). The term "endosymbiosis" has a Greek origin (endo, meaning "within"; syn, meaning "with"; and biosis, meaning "living"), and it refers to the phenomenon of an organism living within another organism."
This phenomenon was first established as the origin of mitochondria and became the accepted answer for the origin of chloroplasts only following the work of Lynn Margulis in the 1960s.
*Look up chloroplasts in the BBC Learning Zone on Sachs and in Nature.com - where the material on Mereschcowsky as the man who first explained the origin of the chloroplast (not its existence, as is stated elsewhere and previously in this answer) is described.
Where in a chloroplasts do the light reactions of photosynthesis take place?
It takes place in thylakoids.They are membrane stacks
What material comes in to the chloroplast that is used in the Calvin cycle?
The material that comes into the chloroplast for use in the Calvin cycle is carbon dioxide (CO2) and ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate) from the light-dependent reactions of photosynthesis. These materials are used in the Calvin cycle to produce glucose.
Why is chlorophyll present in plant cell?
because it gives plants a green color and help it to not attract to much sunlight. I hope this is right! :)
What is the function of the thylakoid in the chloroplast?
It takes in light energy to make food for plants.
Does vascular plants have a chloroplasts?
yes. chloraplasts is necessary for all plants to receive energy from sun.
What best describe a chloroplast?
A chloroplast is an organelle in the plant cell to help produce energy from photosynthesis.OR a plastid
How is light captured by chloroplasts?
They are flat, oval like shapes spread out to maximize light capture/
Linear arrangement in the columnar palisade cells
Why are chloroplasts important to animals?
Chloroplasts in plants, are part of the vital system of photosynthesis. This allows a plant to convert sunlight into nourishment for the plants, and by extension, nourishment for plant eating animals, who gain nutrients from the plants, and by the carnivores that feed on those plant eating animals. Additionally, being part of the process of photosynthesis, allows the plant to generate breathable oxygen, permitting an ecosystem to exist.
What is the place were the chloroplast is located?
They are in plant cells. Some protists like algae have
Does chloroplast contain stoma?
The chloroplast is a cellular organelle that performs photosynthesis while a stoma (plural: stomata) is a two-celled structure seen on leaf surfaces. Thus, chloroplasts cannote be said to "contain stomata". Stomata are pores that regulate water evaporation and gas exchange. The two guard cells that form the stomatal pore each contain chloroplasts.
However, I feel you may be confusing the term "stoma" with "stroma". "Stroma" is a term used for the liquid matrix seen inside chloroplasts - i.e. chloroplasts contain stroma. Many important photosynthetic reactions occur in the stroma and thylakoids in the chloroplast are surrounded by it.
What color are the regions of visible spectrum in which chlorophyll reflect?
They are the greens. That is why plants are green
Is chloroplasts surrounded by a double membrane?
in animals (including humans), single. its the same for all eukaryotes. same goes for all species of archea except three (making up a unique genus).
some bacteria have a double membrane around their cytoplasm, but not all.
What type of unicellular organism contains chloroplasts?
Chloroplasts are in eukariyotes.Best example is unicellular algae.
What is the functions granum in structure of chloroplast?
The storage granule are membrane bounded vesicles containing condensed secretory materials (often in an inactive, zymogene, form). Otherwise known as zymogene granules or vacuoles. Granules found in plastids or in cytoplasm, assumed to be food reserves, often of glycogen or other carbohydrate polymer.
What are the structures in cells that contain chlorophyll?
Tiny structures in palisade are called granna .
How many chlorophyll pigments present in chloroplast?
Chlorophyll is NOT the only pigment contained in a plant cell because all chlorophyll does is give the plant its green color. so do you think tat the only pigment in plant cells would be hte one that gives the plant its color? I DONT THINK SO. there are many pigments in plant cells
When does carbohydrate production occur in a chloroplast?
During The Calvin Cycle cycle, sugars are produced in the chloroplast.
Where are the pigments located in the chloroplast?
Chloroplasts contain structures called thylakoids (this is where photosynthesis takes place); inside the thylakoid membrane are colored photosynthetic pigments.
There are a total of 6 photosynthetic pigments, although 2 are by far the most important; these are known as Chlorophyll.
There are two forms of Chlorophyll, Chlorophyll a and Chlorophyll b. Chlorophyll a absorbs light in the 700 mn (nanometer) frequency range and Chlorophyll b in the 680 nm frequency range of the visible light spectrum.
The 6 photosynthetic pigments are:
Chlorophyll a (C55H72MgN4O5) is blue-green in color (reflects this colour)
Chlorophyll b (C55H70MgN4O6) is yellow-green in color
Carotene is orange in color
Xanthophyll is yellow in colour
Phaeophytin a is grey-brown in color
Phaeophytin b is yellow-brown in color
The different locations and concentrations of these pigments give plants their various colors.
The main pigments found In chloroplast is CHLOROPHYLL.
