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A restriction enzyme or restriction endonuclease is an enzyme which cuts DNA at particular recognition nucleotide sequences with Type II restriction enzymes cutting double-stranded DNA known as restriction sites. Like enzymes, make in archaea and bacteria, are thought to have evolved to give a defense mechanism against occupy viruses. Within a bacterial host the restriction enzymes selectively cut up foreign DNA in a procedure called as restriction; host DNA is methylated by a modification enzyme (a methylase) to protect it from the restriction enzyme's activity. Cooperatively, these two procedures form the restriction modification system. For cut the DNA a restriction enzyme create two incisions, once by every sugar-phosphate backbone of the DNA double helix.
Criteria of Essentiality Amon and Stout as early as 1939, suggested certain criteria that an element must fulfil in order to be classified as essential. These criteria are lis
A large leaf on a plant in bright sunshine evaporates 5 grams of water per hour. Cooling the leaf through evaporation in this manner enables the plant to eliminate heat energy at t
What is the structure that maintains identical chromatids bound? The structure that maintains identical chromatids bound is the centromere. Cell Nucleus Review - Image Diver
what is the classification of vertibrates
Meaning of Behaviour Change Communication Now day's very common term used for giving health education to people and for giving information to bring change in behaviour is Behav
Q. How do calcium ions participate in muscle contraction? Why do both muscle relaxation and muscle contraction spend energy? In the muscle cells calcium ions are stored within
what is endosperm haustorium
Neurosecretory Systems Almost all groups of multicellular animals have been investigated to find out if neurosecretory cells are present in them. Such investigations have sho
Q. What happens to the TSH (thyroid-stimulating hormone) blood level in hypothyroidism? Why is there enlargement of the thyroid in the endemic goiter disease? When there is low
it consists of the girdles and the skeleton of the limbs
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