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Q. Do enzymes act better under basic or acid pH?
Most enzymes act in pH between 6 and 8, a range that corresponds to the general acidic level of blood and cells. There are enzymes, however, that act only under very basic or very acid pH. So enzyme activity depends on pH interval.
In the stomach, for example, the gastric juice has a very low pH, around 2, and there the enzyme pepsin acts to intensively absorb proteins. In the duodenum, pancreatic secretions increase the pH of the enteric juice for the action of other digestive enzymes, for example, trypsin.
How do carrier proteins transport substances across cell membranes? Carrier proteins bind to a molecule of the substance on single side of the membrane, change shape, transpor
What is meant by cellular secretion? Cell secretion is the elimination to the exterior of substances formed by the cell (for instance, hormones, mucus, sweat, etc.)
What is a vesicle? A vesicle is a relatively minute intracellular, membrane-enclosed sac that keeps or transports substances
How many of the same proteins are made at the same time by each ribosome in the translation of one mRNA molecule? How does consecutive protein production occur in translation?
Long Distance Transport Once in the xylem vessels, the transport of the mineral elements from the root to the shoot is driven by the gradient of hydrostatic pressure (root pre
NUMBER Benden and Boveri first indicated that number of Chromosomes is definite in each organism. (1) Haploid (n) - One set of Chromosomes. i.e. one Chromosome of each
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why is virus an exception of cell theory
The upper or mountain course - Classification of the river Here the water is fast flowing and runs through a 'V' shaped valley with unstable banks. The fast flowing water has
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