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295 questions found · practise this subject as a set Show 20 · 50 per page

#	Question	Subject and topic	Difficulty
181	Heroin is chemically	Biology/Biological Studies/Biotechnology/Biochemistry Drug and alcohol abuse	Easy
182	Cocaine is obtained from which plant?	Biology/Biological Studies/Biotechnology/Biochemistry Drug and alcohol abuse	Easy
183	Cocaine produces its stimulating effect by interfering with the transport of which neurotransmitter?	Biology/Biological Studies/Biotechnology/Biochemistry Drug and alcohol abuse	Medium
184	Smoking increases carbon monoxide in the blood. What is the direct effect of this?	Biology/Biological Studies/Biotechnology/Biochemistry Drug and alcohol abuse	Medium
185	A teenager who has been using a drug regularly feels anxiety, shakiness and nausea when he suddenly stops. Th…	Biology/Biological Studies/Biotechnology/Biochemistry Drug and alcohol abuse	Hard
186	Which group of microbes converts milk into curd?	Biology/Biological Studies/Biotechnology/Biochemistry Microbes in household products	Easy
187	The large holes seen in Swiss cheese are produced by	Biology/Biological Studies/Biotechnology/Biochemistry Microbes in household products	Easy
188	Apart from making curd, lactic acid bacteria improve the nutritional value of milk mainly by increasing its c…	Biology/Biological Studies/Biotechnology/Biochemistry Microbes in household products	Medium
189	A student keeps bread dough with yeast in a warm place and it swells up. The swelling is mainly caused by	Biology/Biological Studies/Biotechnology/Biochemistry Microbes in household products	Medium
190	A person adds a spoonful of boiled and cooled curd to warm milk, but the milk does not set. The most likely r…	Biology/Biological Studies/Biotechnology/Biochemistry Microbes in household products	Hard
191	Which microbe is used for the commercial production of citric acid?	Biology/Biological Studies/Biotechnology/Biochemistry Microbes in industry	Easy
192	Cyclosporin A, used to prevent rejection of transplanted organs, is obtained from	Biology/Biological Studies/Biotechnology/Biochemistry Microbes in industry	Easy
193	A detergent company wants an enzyme that removes oily stains from clothes. Which microbial enzyme should it a…	Biology/Biological Studies/Biotechnology/Biochemistry Microbes in industry	Medium
194	Statins produced by Monascus purpureus lower blood cholesterol because they	Biology/Biological Studies/Biotechnology/Biochemistry Microbes in industry	Medium
195	A doctor gives a patient who has just suffered a heart attack an injection that dissolves the clot in a coron…	Biology/Biological Studies/Biotechnology/Biochemistry Microbes in industry	Hard
196	Which group of microbes is chiefly responsible for producing methane in a biogas plant?	Biology/Biological Studies/Biotechnology/Biochemistry Sewage treatment and biogas	Easy
197	In a sewage treatment plant, the masses of bacteria associated with fungal filaments that form in aeration ta…	Biology/Biological Studies/Biotechnology/Biochemistry Sewage treatment and biogas	Easy
198	Water sample P has a BOD much higher than sample Q. What does this indicate?	Biology/Biological Studies/Biotechnology/Biochemistry Sewage treatment and biogas	Medium
199	Why is a part of the activated sludge pumped back into the aeration tank?	Biology/Biological Studies/Biotechnology/Biochemistry Sewage treatment and biogas	Medium
200	Cattle dung is a good raw material for biogas plants mainly because it	Biology/Biological Studies/Biotechnology/Biochemistry Sewage treatment and biogas	Hard