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• Cancer cells do not respond normally to the body's control mechanism.
o They divide excessively and invade other tissues.o If left unchecked, they can kill the organism.
• Cancer cells do not exhibit contact inhibition
o If cultured, they continue to grow on top of each other when the total area of the petri dish has been covered o They may produce required external growth factor (or override factors) themselves or possess abnormal signal transduction sequences which falsely convey growth signals thereby bypassing normal growth checks.
• Cancer cells exhibit irregular growth sequences
o If growth of cancer cells does cease, it does so at random points of the cell cycle o Cancer cells can go on dividing indefinitely if they are given a continual supply of nutrients o Normal mammalian cells growing in culture only divide 20-50 times before they stop dividing.
A true-breeding petunia plant with red petals was crossed with another true-breeding petunia plant with white petals. The plants of the F1 progeny had blue petals. When these F1 pl
FUNCTION S OF KIDNEY - 1. Excretion of nitrogenous wastes. 2. Maintenance of water balance or osmoregulation. 3. Acid base balance or regulation of pH.
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Explain primary structure of proteins The primary structure of a protein having of the order in which amino acids are bonded to one another by a peptide bond.
A large number of plants are used for bio-pesticides and bio-fertilizers. Several plant species are used as insecticides against aphids and larvae of insect pests: for insects like
Classic Procedure: The approach is the same as described earlier for open mitral valvotomy. The excision starts with an anterior incision on the anterior leaflet at 12o'clock p
Define the Methyl Red Test? As you have read in previous section, all enteric bacteria utilize glucose to obtain energy. Depending upon the end products formed, all enteric bac
Explain Extra Cardiac Conduit Fontan ? This can be done with or without cardipulmonary bypass. First step is to make a bi-directional Glenn shunt. The main pulmonary artery is
extracellular signals and their characteristics
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