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A pure phospholipid bilayer with its hydrophobic interior, is permeable to water and gases such as O2, CO2, N2 and small uncharged polar molecules such as urea, ethanol, but is impermeable to large uncharged polar molecules such as glucose, ions (Na+ , K+ , Cl-, Ca2+ ) and charged polar molecules instance for amino acids, ATP, glucose 6-phosphate. The initial group of molecules can cross a biological membrane unaided and without an input of energy, whereas the latter group requires the presence of integral membrane transport proteins and, in many cases an input of energy to travel by the otherwise impermeable membrane barrier. Thus the plasma membrane and the membranes of internal organelles are selectively permeable barriers and maintaining a distinct internal environment.
what is definition of applied biology?
Talk about briefly three of the common enteric diseases caused by inadequate clean water supply and insufficient sanitation facilities. Your talk should contain the source and spr
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what direct or indirect effect is " acid rain" thought to have on (I) lakes, (ii) forests and (iii) buildings
#question.what do u mean by parasitic habit.give account of various parasitic adoptation in animal.
Define Maternal Nutrition and Foetal Outcome? Maternal malnutrition has deleterious effects on both the mother and the offspring. Inadequate energy intakes, iron deficiency an
Triglyceride accumulation is not a feature of the atherosclerotic plaque but triglyceride-rich lipoproteins also contain cholesterol esters and it is likely that some of these are
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