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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 the Energy requirement to avoid Underweight problem? The total calorie intake should be 500 to 1000 Kcal in excess of the daily needs in order to result a gain in weight
SEMINAL VESICLES (UTERUS MESCULANIS) - Seminal vesicles are elongated, convoluted, musculo glandular sac about 4 cm long ( 9 cm if straightened). Lined by pseudostratified e
Oil seed meals as source of limiting amino acids Generally ruminants are not perceived to have a requirement for essential amino acids as the rumen microbes can synthesis esse
parasitic adaptations
Q. Clinical Features of gout disease? You may be enjoying good heath but may suddenly get a severe attack. You wake up in the middle of the night, and your big toe feels as if
What are the Properties of titanium Titanium has several favourable properties like low specific gravity with a density of 4.5 gm/cm 3 , high heat resistance and high strength
Regional Specialisation Regional specialisation takes place usually by three processes – 1) Restriction of certain structures to a few segments, for example, gonads are res
What are some diseases or genetic abnormalities caused by dominant genes? Why are severe dominant genetic diseases rarer than recessive ones? Instance of dominant genetic disea
Determine the tenant of the Cell Theory Which of the following is not a tenant of the Cell Theory as postulated by Mathias Schleiden and Theodor Schwann? A. All organisms a
The PCR (polymerase chain reaction) is an extremely simple as immensely powerful methods. It permits enormous amplification of any particular sequence of DNA
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