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Bacteriophage is a virus which infects a bacterium and which is many times used in molecular genetics experiments as the vector, or cloning vehicle. Recombinant phages can be made in which certain non-essential l DNA is removed and then replaced with the DNA of interest. The phage can accommodate the DNA "insert" of about 15-20 kb. Replication of that virus will hence replicate the investigator's DNA. One would take use of phage l rather than a plasmid if the desired piece of DNA is rather large. Bacteriophage l and M13 are the ones usually used in cloning or subcloning of small genes or DNA fragments in E. coli. Bacteriophage P1 is one which is used for fragments up to 95 Kb in size.
Define the diseses Shigellosis Shigellosis or bacterial dysentery is caused by facultative anaerobic, gram-negative, non-spore forming, rod-shaped Shigella in the family enter
Hepaticae (Liverworts) The gametophyte is thalloid body or simple stem and leaves, with aquatic or semi-terrestrial habit. Rhizoids are multiceillular. Some examples : Mar
Q. How is carbon dioxide made by producers and consumers? The Carbon dioxide is made by consumers and producers through cellular respiration.
Q. Write the meaning of Polydypsia? Increased Thirst (Polydypsia): As the patient is losing more water through excessive urination, the patient feels thirstier and tends to tak
What is the destination of the branchial clefts in humans? In humans the branchial clefts situated in the anterior region of the pharynx (also called as pharyngeal clefts) are
Q. Explain Degradation of Fats? Fats are the esters of glycerol and fatty acids and are called as 'glycerides'. Fats are susceptable to hydrolysis, oxidation and other che
Define Polyacrylamide gel electrophoresis (PAGE)? Acrylamide gel has the advantage over starch in that it is easier to prepare and is more inert, the pore size can be varied in
Concerning the presence of the nucleus what is the difference among animal and bacterial cells? Animal cells (cells of living beings of the kingdom Animalia) have an interior m
How sugar is used in Meringues? Egg whites beaten for a meringue hold air bubbles as the mechanical action of the beaters partly coagulates the egg protein. Sugars make the pro
Define Food Business and Food Technology? The food business and food technology are practically inseparable. The food business may be characterized as: vulnerable to spoilage,
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