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Protozoans ingest food by phagocytosis, and consequently, the ingested food is surrounded by a plasma membrane creating a food vacuole, or phagosome. Digestion does not start until phagosomes fuses with a lysosome that contains the digestive enzymes. Everything being digested, and enzymes digesting it, are contained inside a plasma membrane permeable only to small molecular weight compounds, products of digestion. Enzymes are too big to cross the membrane, so there's no danger that they might mistakenly digest the cytoplasm of cell. Initially the pH inside the food vacuole is acidic and as digestion proceeds, contents of the vacuole become more alkaline. To be sure that nutrients get to every part of the cell, food vacuole is swept around the cell by the cytoplasmic currents and nutrients diffuse out supplying the different parts of the cell. Once there is only undigested food left, food vacuole fuses with the cell membrane, dumping its contents to the outside of the cell.
Metallurgical coke should have following characteristics: 1. Purity: low amounts of moisture, ash, sulphur & phosphorous should be present. 2. Porosity: it should b
A wild-type strain of haploid yeast is crossed to a mutant haploid strain to make a diploid. What phenotypic ratios will be observed in the haploid progeny of the diploid?
Phenylketonuria is a severe form of mental disability caused by a homozygous recessive allele. The condition affects about 1 in 10,000 neborn Caucasians. Estimate the frequency of
Anaerobic Oxidation Embden Meyerhof pathway The initial stage of biological oxidiation includes a series of nine main sequential steps of reactions known as Embd
Biochemical Changes - Consequences of Aging Several biochemical changes are correlated with aging. Detailed biochemical studies in rats have been carried out by Prof. M.S. Kan
PHYSIOLOGY AND BIOCHEMISTRY - Ample and concrete evidence of organic evolution are obtained from the functional activity and chemical composition of animals. J.B.S. Hald
Explain the Ecosystems? The ecosystem is yet another level, or ecological unit, studied by ecologists. An ecosystem encompasses all of the organisms (all the populations-the en
Membrane proteins are classify as either integral (intrinsic) or peripheral (extrinsic) depending on how tightly they are linked with membrane. The Integral membrane proteins are s
Nutrition in amoeba?
whats polymorphic
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