0
Chloroplasts
Chloroplasts are a part of a plant's cell. They capture energy from light.
1,379 Questions
Why do leaves contain more chloroplasts than roots?
Plant leaves contain more chloroplasts than plant roots because photosynthesis occurs in the leaves. In order to carry out the various functions of photosynthesis, a large number of chloroplasts is required.
Why does chloroplast look green?
Plants apear green because of chlorophyll--the pigment inside the chloroplasts. It absorbs red and blue light from the sun and uses this light to carry out photosynthesis within the plant.
What do you call the space between the thylakoids and the inner membrane of the chloroplast?
They are called thylakoid membranes.Light reaction takes place on them.
Characteristics of a chloroplast?
Chloroplasts are membrane-bound organelles found in plant cells that are responsible for photosynthesis. They contain chlorophyll, a green pigment that captures sunlight for energy production. Inside chloroplasts, thylakoid membranes are organized into stacks called grana, where light-dependent reactions occur. Chloroplasts also contain their own DNA and ribosomes, allowing them to produce some of their own proteins.
Does xylem cells have chloroplasts?
at first they do, but as they mature, their cell walls thicken and they get htese things called lignin that makes it harder and rigid. this help keep plant standing up, but also means water can't get into the xylem cells so they die, thus no nucelus.
What is a flattened sac in a chloroplast called?
The flatted sacks with in the chloroplasts are called chlorophyll. The chlorophyll preform photosynthesis inside the plant cell.
How is the inner membrane of a chloroplast different from the outer membrane?
A highly speacialised that transports protein
Are there chloroplasts in cyanobacteria?
Yes cynobacteri have photosynthetic mechanism. Cyanobacteria have an elaborate and highly organized system of internal membranes which function in photosynthesis. Photosynthesis in cyanobacteria generally uses water as an electron donor and produces oxygen as a by-product, though some may also use hydrogen sulfide as occurs among other photosynthetic bacteria. Carbon dioxide is reduced to form carbohydrates via the Calvin cycle. In most forms the photosynthetic machinery is embedded into folds of the cell membrane, called thylakoids. The large amounts of oxygen in the atmosphere are considered to have been first created by the activities of ancient cyanobacteria. Due to their ability to fix nitrogen in aerobic conditions they are often found as symbionts with a number of other groups of organisms such as fungi (lichens), corals, pteridophytes (Azolla), angiosperms (Gunnera) etc.
What is the function of the substance inside the chloroplast?
The substance is chlorophyll. They carry out photosynthesis
What ts the primary colour in chloroplast?
Not the primary color,it is primary pigment.Primary pigment is chlorophyll.
What are the green structures in plant cells that contains the green pigment chlorophyll?
They are called chloroplasts.They directs the photosynthesis.
Which part of a plant do chloroplast reside in?
PS1 (Photosystem 1) is located on the stroma thylakoids: the thylakoids floating around in the stroma. PS2 is located on the grana thylakoids, those thylakoids organized into stacks called grana!
Why is temperature important for photosynthesis?
temperature effects the rate at which photosynthesis works. e.g. if it is hot then the rate will increase, cold temperature will result in a less productive plant.
NOTE: The ideal temperatures vary from plant to plant.
Why animal cells do not contain chloroplasts?
Animal cells are not capable of photosynthesis hence these cells lack chloroplasts. We can also put it this way, that since animal cells lack chloroplasts, these are not capable of photosynthesis.
How does carbon dioxide and water reach the chloroplast in leaves?
The chloroplasts in the leaves absorb the light directly from the sun. The carbon dioxide goes into the leaves through the stomata (tiny holes on the bottom of a leaf) and is diffused through the rest of the cells. The water is absorbed by the roots then carried by the xylem up to the leaf and the cells in the leaf.
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.
