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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.
Q. Concerning their biological function what is the difference between meiosis and mitosis? The main biological function of mitosis is cellular multiplication a fundamental pro
Q. What is Glucose Tolerance Test? Glucose Tolerance Test (GTT) is used for diagnosis of diabetes mellitus. In this test, blood sugar levels are measured after giving glucose
The following series of nucleotide bases forms part of a DNA molecule: T A C T T A T G A C A C A G G A G G A C T a) Convert this string of bases that would be found on the corresp
In how many categories nutrients are divided? The nutrients are grouped into three categories: 1) Energy Yielding: Carbohydrates and fats produce energy in the body. 2) B
Define about the Iodine Toxicity? A wide range of iodine intakes is tolerated by most individuals, owing to the ability of the thyroid to regulate total body iodine. This toler
What is Polysaccharides? Polysaccharides: Many monosaccharide subunits can be joined to form long, complex polysaccharide molecules. These complex sugars are often used to s
How does bisulfite sequencing work ?
PITS Depressions in secondary cell wall is called pit. A pit present on the free cell wall surface without its partner is called Blind pit. It consists of 2 parts -
To ensure the building's resistance to potential earthquakes it should be configured, detailed and constructed accordingly. Any weakness in this regard may affect the building's re
what is the life cycle of plasmodium vivax?
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