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Q What is the fundamental structure of the HIV virus? What is the function of the glycoproteins of its envelope?
HIV is an RNA virus in its core there are two strands of RNA and reverse transcriptase molecules. The core is covered by a capsid a layer of proteins. The capsid then is covered by an envelope having lipids and glycoproteins.
The glycoproteins of the HIV envelope are located on the outer surface of the virus and they are responsible for the recognition of the cells to be infected the HIV host cell is the CD4 lymphocyte and for the adhesion of the virus to the cell membrane. CD4 is a receptor glycoprotein of the external membrane of some lymphocytes.
CELLULOSE It is a linear polymer of b -D-glucose. It is the structural polysaccharide of plant cell walls, walls of some primitive fungi, some protists, and tunic of asci
Computed Tomograpy Scan Developments in cross-sectional imaging techniques such as spiral tomography and reformatted computerized tomograms have become increasingly popular in
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Explain Two major causes of severe Protein Energy Malnutrition? Two major causes of severe PEM are diluted milk formulae and infections, especially diarrhoea in poor communiti
Chikungunya Chikungunya, a metazoonosis, is caused by chikungunya virus belonging to genus Alphavirus of the family Togavirideae. The virus is transmitted by infected mosquito
Simple diffusion Only comparatively small uncharged or hydrophobic molecules (H2O, O2, and CO2, other gases, urea and ethanol) cross the lipid bilayer through simple
Define protein requirements of children up to age of 2 years? Infants and children up to age of 2 years should consume about 40% energy from fat (i.e. 40 en%). Fat is an import
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