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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.
From where does the cell get oxaloacetic acid for krebs citric acid cycle? Oxaloacetic acid is also formed when pyruvate is acted upon by pyruvate carboxylase in response to an
Define Features of male and female ascaris lumbricoides? i) Ascaris lumbricoides is commonly called round worm. ii) Body is elongated, cylindrical, tapering at bot
Q. Show the process of Chemotaxonomy ? Chemotaxonomy is a science which uses chemical information as a character for taxonomic purposes. Before we analyse the basis of this mod
describe the different types of genomes that viruses can have
Define about the concept of sports nutrition? The concept of sports nutrition was evolved fundamentally with integration of different disciplines in order to collectively striv
why are blood formed at bones or joints
What is the function of the right ventricle? To where does the right ventricle pump the venous blood? The function of the right ventricle is to get venous blood from the right
Define Standardization - Nutritional Biochemistry? One of the substances involved in a titration must be used as a standard for which the amount of substance present is accura
The life of a eukaryotic cell can be explained as a cell cycle. Mitosis and cell division happens in the M phase that lasts for only about 1 h. This is followed by the G1 phase whe
Ecological adaptation in animals to aquatic environment In the aquatic environment animals are confronted with the problem of excess water. Freshwater and marine animals try to
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