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ENDOPLASMIC RETICULUM (ER)Eucaryotic celIs have two major compartments- nucleus and cytoplasm. Cytoplasm was known to have no structure until the discovery of electron micrsscope. That cytoplasm is permeated by a membranous network called endoplasmic reticulum (ER), was revealed only after the introduction of electron microscope. Endoplasmic reticulum is a three dimensional network of membrane channels which constitutes more than half of the total membrane of the cell, ER is a highly folded and convoluted structure and forms a single continuous sheet enclosing one continuous sac. The interior of the sac is called "cisternal space" or "ER lumen". This is separated from the cytoplasm also called cytosol by a single membrane which mediates the communication between these two compartments. ER provides the cell with a compartment for storage of substances to be kept separate from cytosol. In addition, it has a key role in the biosynthesis of macromolecules. ER is a double membranous organelle which consists of interconnecting flattened sacs called cisternae or interconnected tubules or vesicles. Cisternae are temporary storage sites for nutrients (Figure shown below).
Gibberellins in plant growth Gibberellins were first isolated from the culture of a fungus Gibberella fujikuori. Gibberellins has a significant effect on stem elongation
What is the process of Breathing? Oxygen is supplied to the blood, and carbon dioxide is removed from the blood by the process known as breathing. Air is moved into an exchan
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Passage of Pollen Tube In cotton, the pollen produces a tube within an hour which grows on the surface of the stigmatic hairs, and then between the cells of the stigma at the
Q. Differentiate between adult and infant botulism? • Adult Botulism is prevalent amongst adults whereas Infant Botulism is prevalent in infants of less than one year of age.
Define Management of Canal Blockage Canal Calcification Diamond coated instrument rt 1 designed for better visibility and cutting efficiency a) Very powerful for efficient
In eukaryotes the SER has enzymes able to begin double bonds into fatty acyl CoA molecules in an oxidation reaction which uses molecular oxygen. This reaction is catalyzed
Explain about the Glycemic Index (GI)? In the previous sections, we have studied that some carbohydrates are rapidly digested and absorbed, some are digested slowly while some
Assessment of Tricuspid and Pulmonary Orifice Areas Due to the rarity of tricuspid stenosis and pulmonary stenosis, no general agreement exists on what constitutes critical o
How to find the number of pair of alleles involved in polygenic inheritance using the number of phenotypical forms of the trait they condition? Considering the "p" number of th
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