Chloroplast Structure And Functions | Stroma | Class 11 Biology

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About This Video ........................
In This Video Lecture You Will Learn Basic Concept Of Chloroplast
In photosynthetic plant cells, there are membrane bound structures containing a green pigment,
absorb light energy and utilize it to manufacture food. Chlorophyll molecule resembles the haem
called chloroplasts. The green pigment is an organic compound, chlorophyll, which helps the cell to
group of haemoglobin, a protein used in the transport of oxygen. The main diference between
these two molecules is that chlorophyll has Mg++ while haem has Fe++ as the central atom.
Chloroplasts vary in their shape and size with a diameter of about 4-6 nm. Under light microscope
matrix. Under electron microscope, a chloroplast shows three main components, the envelope,
proteins, some ribosomes and a small circular DNA. It is in this part of the chloroplast where CO2
is ixed to manufacture sugars. Some proteins are also synthesized in this part. Thylakoids are the
most of the volume of the chloroplast. Stroma is a luid which surrounds the thylakoids. It contains
is why granum appears to be green (Fig.4.14). Each granum is interconnected with others by the
non-green part called intergranum. Membranes of the grana are sites where sun light energy is
a pile of thylakoids stacked on each other like coins. On an average, there are 50 or more thylakoids
the stroma and the thylakoid. The envelope is formed by a double membrane, while stroma covers
they appear to be heterogeneous structures with small granules known as grana embedded in the
lattened vesicles which arrange themselves to form grana and intergrana. A granum appears to be
piled to form one granum. On the layers of thylakoids chlorophyll molecules are arranged and that
trapped and where ATP is formed. Chloroplasts are self-replicating organelles.
About This Channel.....................
I make these videos cause I love to draw and connect the complexity of science and medicine into art. I'm not saying. I'm 100% correct in all my videos, but I do try to obtain the information from credible sources.
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Why Chloroplast is said to be an energy converting organelle?

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Hemoglobin present in chloroplast

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Inner membrane and outer membrane collectively knows as

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Envelope

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