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Zymogens, or proenzymes, are enzymes secreted in inactive form. Under certain conditions, a zymogen shifts to the active form of the enzyme. Zymogen secretions in general occur due to the enzyme activity can harm the secretory tissue.
For example, the pepsinogen secreted by the stomach becomes active under acid pH turning into the enzyme pepsin. Other well-known zymogens are trypsinogen and chymotrypsinogen. Enzymes are secreted by the exocrine pancreas and correspondingly trypsin and chymotrypsin.
Cytokinesis in an animal cell: Splitting of the cell is called cytokinesis which starts at telophase. In animal cells, microtubules form a furrow in a ring around the cell.
In the previous section we discussed the concept of species in detail and concluded that the concept of biological species and Mayr's definition of species have a wide acceptance a
Explain Metabolism of Iron? In this sub-section, we will study how body gets its iron supply, how iron is transported and utilized by the various tissues and how iron balance i
Define the Psychological problems - Effect of Obesity? Obese people may be exposed to ridicule and discrimination in areas like employment, promotions and social interactions.
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What is RNA? RNA is a single-stranded molecule which has as its 5-carbon sugar ribose instead of the deoxyribose found in DNA. Also, uracil is substituted for thymine as a ni
Is the bacterium MRSA pathogenic or non-pathogenic? MRSA bacteria are pathogenic. This group of bacteria belongs to Staphylococcus aureus family, which have grown resistant to
Which of the following is true of energy? a. It can be transferred from one form to another with 100 percent efficiency. b. It can be created from nothing. c. It can be stored i
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