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Q. Define High Density Lipoproteins ?
High density lipoproteins (HDL) are the smallest of the lipoprotein species and transport approximately 20 to 30 per cent of plasma cholesterol. Nascent HDL in the form of bilayer discs containing apoproteins A and phospholipid is secreted by the liver and intestine. Cholesterol ester formed on HDL transfers to other lipoproteins via cholesterol ester transfer protein (CETP) in exchange for triglyceride. Mature HDL consists of two principal subclasses, HDL2 and HDL3.
What is the evolutionary importance of pteridophytes? As the first tracheophytes, pteridophytes were also the first plants to extensively colonize the terrestrial environment f
Explain Positive Staining Technique? Here, a stain has a positively charged chromophore that gets attached to the negatively charged outer surface of the microbial cell and thu
What are fossils? The Fossils are petrified vestiges of beings that lived in the past conserved by chemical and geological processes and found within rocks and sedimentary stra
A scientist wanted to study the effect of a drug on the blood pressure of rats. She set up an experiment in which the experimental group consisted of rats that were injected with a
Q. How mineral salts participate in osmotic regulation? Osmotic pressure depends not on the nature of such particles and on the number of particles dissolved in a solution. Min
Monomeric enzymes Monomeric enzymes are those which consist of only a single polypeptide chain, so they cannot be dissociated into smaller units. Very few monomeric enzymes are
Define Need of vitamin A during pregnancy period? All four vitamins (A,C,E and K) have specific functions and a common role for all of them is to preserve the structural and fu
Class of Mollusca - Monoplacophora Bilaterally symmetrical, with broad flat foot and single shell, mantle cavity has five to six pairs of gills; six pairs of nephridia of whi
Explain the De Bakey Type I Dissection? De Bakey Type I Dissection : Initial steps of the operation are same as previously described. Provision for deep hypothermic ci
1. Compute the mean energy per nuclear disintegration, A, for 99m TC if 2.0 x 10 9 Bq of this isotope is injected into a patient. Assume that one-half of the administered dose is
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