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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.
Question Write a short note on the following 1 Simple diffusion 2 Viscosity 3 What is spectroscopy? List and explain types of spectroscopy 4 With a neat diagram,
Q. What are the Pseudo-yeasts? These are like true yeasts but do not form spores. All the members of this group are particularly unsuitable for fermentation purposes as they p
Is a viral infection treated with the same kind of drug that treats bacterial infections? Antibacterial drugs, potent against a great variety of bacteria, are not effective aga
Explain the Classification of simple proteins? 1) Albumins: Proteins such as egg albumin and serum albumin are soluble in water and coagulable by heat. 2) Globulins: These p
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what is working of heart
How do respiratory pigments act? Respiratory pigments are oxygen-carrying molecules present in the blood. When the oxygen concentration is high, for instance, in the pulmonary
TRISACCHARIDES The oligosaccharides are made of three monosaccharide residues. A common trisaccharides is Raffinose which is formed by condensation of galactose-glucose-fr
TYPES OF EGGS Different species of animal has different type of eggs. They are classified on the following basis - 1 . ON THE BASIS OF AMOUNT OF YOLK On the ba
Determine what the abnormal levels of AFP signal Abnormal levels of AFP may signal the following: Open neural tube Defect (ONTD) Down syndrome Other chromosoma1
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