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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.
Endosperm - Pollen Biology The examination of live material of j. montana reveals that the division of the primary endosperm nucleus is transverse, followed by the laying down
Explain brifly Ribosomes, Endoplasmic Reticulum, Golgi Apparatus ? Ribosomes, Endoplasmic Reticulum, Golgi Apparatus : The cytoplasm contains many ribosomes, which are sphe
Explain Inhibition of cancer cell proliferation and growth? Vitamin D diminishes proliferation of abnormal intestinal, lymphatic, mammary and skeletal cells and provides a pote
Q. How does self infection by tapeworms occur? The Taeniasis patients may develop the most severe form of the worm infection, cysticercosis, because their feces contain eggs
Define Enrichment Media - Culture Media? It contains selective ingredients in the medium, which shifts the growth in a mixed microbial population to a particular group of micro
Q. What are worm infections? The Worm infections are human diseases caused by nematodes(roundworms) or platyhelminthes (flatworms).
Q. Can you explain Relation between Coronary Artery and Myocardial supply? Ans. There is a well-established relation between a given epicardial coronary artery and its myo
how efect of gravity on roots?
Is gene a triplet of consecutive DNA nucleotides A gene isn't a triplet of DNA nucleotides with their respective nitrogen-containing bases, like CGT or AAG. The nucleotide trip
A foreign DNA has to target a precise chromosomal site and integrate with the host DNA. Are the methods of gene therapy strong enough to produce desired expression without mistakes
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