نمونه سوالات آزمون های کارشناسی ارشد بیوتکنولوژی و داروسازی زبان عمومی و تخصصی امتحانات 94-86 - بخش (1)

Hurricane Floyd, one of the most powerful storms ever ….1….in the Atlantic, has pounded the Central Bahamas and set its sights …2…Florida. The storm brought heavy rains and strong winds of up to 200 kph., ….3….residents sought refuge in boarded up homes. Forecasters say Floyd is capable of ....4....destruction and the states of Florida and Georgia have ordered more than two million people ....5....the Atlantic shoreline.

Since food production in the world is of major importance, all potential food sources must be explored. In his big search for food, modern man is now looking beyond agriculture, animal breeding and fish harvesting. One new potential food source is based on the discovery that it is possible to sustain fermentation processes, not only on conventional carbohydrate media but also on oetroleum hydrocarbon media. It has been known for some years that bacteria would attack hydrocarbons, undesitable foreign materials having been produced in that way in aircraft fuel tanks, etc. The application of this knowledge to the production of synthetic protein materials containing the essential amino acids by hydrocarbon fermentation dates only from the early 1960`s, however. One of the major stimuli for development work on protein food production from petroleum lies in the rate of food production as compared to conventional means. Thus, bacteria and years that feed on hydrocarbons are capable of doubling their weight in 3 to 5 hours, whereas plants like soybeans, require as much as 1 to 2 weeks and cattle 2 to 4 months to double their weight. Land requirements for protein production by fermentation would be a small fraction of that needed for agriculture or animal raising; also water requirements would be lowered.