A piece of human DNA is treated with two common restriction enzymes. The DNA piece in question is 50 Kbp or 50,000 base pairs (bp) long. The numbers of fragments obtaincd with one of the enzymes was estimated by computer analysis to be about 200 fragments, while with the other enzyme the number of recorded fragments was only about 10. You later find that two enzymes had the following palindrome as recognition sequence on DNA. 5'. -GAATTC---- --3' 3'- -СТТАAG- Enzyme-1 5' 3'. --GATC- --CTAG-- Enzyme-2 EXPLAIN quantitatively these results? Which enzymes generated cach fragment number and why?

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Environmental health and hazards

An organism's environment is the environment in which it lives and has an impact on its well-being. The World Health Organization (WHO) defines environmental health as "those aspects of public health, such as quality of life, that are influenced by physical, chemical, biological, social, and psychosocial components in the environment." Environmental health is concerned with both natural and man-made settings in order to enhance public health. Environmental science, occupational medicine, toxicology, and epidemiology are the key subdisciplines of environmental health.