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The extracellular surface of the plasma membrane is frequently covered with a protective coat of carbohydrate. A Sugar residue of this carbohydrate coat can be friendly either to certain lipids like as the glycosphingolipids, or to the polypeptide chains of peripheral or integral membrane proteins. These glycoprotein's and glycolipids are abundant in the plasma membrane of eukaryotic cells but are almost absent from most intracellular membranes, mainly the chloroplast lamellae and the inner mitochondrial membrane. In glycoprotein the sugar residues can be friendly to the polypeptide chain either by the hydroxyl group in the side-chain of Ser or Thr residues as O-linked oligosaccharides, or by the amide set in the side-chain of Asn as N-linked oligosaccharides. The carbohydrate on the extracellular face of the membrane not only gives a protective role but is also having in intercellular recognition and in preserve the asymmetry of the membrane.
figure: The erythrocyte cytoskeleton
Composition of blood: Take few ml. of fresh blood in a test tube and before collecting the blood add a few drops of sodium oxalate or sodium citrate solution to prevent clot
Explain Stavudine It can be given either in initial combination therapy or after failure of regimens containing other NRTIs. Cross-resistance with zidovudine is frequent, ho
A genetic trait which is considered to be harmful in the present day might prove to be beneficial in future. For example by removing the trait for sickle cell we may increase the s
Determine some Common Micronutrient Deficiencies? Vitamin A deficiency Iron deficiency anaemia Iodine deficiency disorders Zinc deficiency
Important aspects related to regulation include: 1) The hormones glucagon and glucocorticoids which are secreted during starvation stimulate glucose-6-phosphatase to en
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Explain the differance between savanna and desert? Savanna : Savanna is characterized by relatively low rainfall and pronounced dry seasons. This type of climate produces a b
Skin puncture: skin puncture is usually done when small volume of blood is needed (e.g., blood glucose test) to avoid unnecessary venipuncture. However, skin puncture in
what is photo-respiration
How does water move inside sponges? What is the function of the pores in these animals? Sponges are filtering beings. They make water enter their bodies by their lateral pores
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