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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.
Define Diarrhoea problem of infants & preschoolers nutrition? We have just covered control and strategies in diarrhoea management in the above section. Crawling, unclean hands,
Explain Tetralogy of fallot repair and Transposition of arteries? Tetralogy of Fallot Repair: This involves RV outflow resection, closure of the VSD and enlargement of the RV
African horse sickness African horse sickness (AHS) is a highly fatal insect born viral disease of equidae caused by an Orbivirus (family Reoviridae) and characterized by sever
(a) What effect does alcohol have on reaction time? (b) What other short-term effects does alcohol have? (c) What long-term effects can result from an exce
A person has swelling on the front of his neck. Name the disease he is suffering from and the cause of it.
Q. Identification and Care of Taxonomic collections? Collection of plant specimens is essential for taxconomic research. Herbarium specimens become a permanent record. Select t
when microbial culture must be harvested after giving osmotic stress to analyze osmotolerant genes?
What is the meaning of Obesity? Obesity is a condition resulting from accumulation of excess body fat. The fat deposition takes place because over a period of time, people cons
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Dietetic Foods for diabetes: With advances in food technology, foods for special use by diabetics are now available in the global market, they are emerging in India also. These
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