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295 questions found · practise this subject as a set
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| # | Question | Subject and topic | Difficulty |
|---|---|---|---|
| 151 | According to the Hardy–Weinberg equation, the frequency of heterozygotes is given by | Biology/Biological Studies/Biotechnology/Biochemistry Hardy-Weinberg principle |
Easy |
| 152 | Which of the following does not disturb Hardy–Weinberg equilibrium? | Biology/Biological Studies/Biotechnology/Biochemistry Hardy-Weinberg principle |
Easy |
| 153 | In a population at equilibrium, 16% of individuals show a recessive trait. What is the frequency of the domin… | Biology/Biological Studies/Biotechnology/Biochemistry Hardy-Weinberg principle |
Medium |
| 154 | If the frequency of allele A is 0.7 in a population at equilibrium, what is the expected frequency of genotyp… | Biology/Biological Studies/Biotechnology/Biochemistry Hardy-Weinberg principle |
Medium |
| 155 | In a population of 1000 at Hardy–Weinberg equilibrium, 160 individuals are homozygous recessive. How many are… | Biology/Biological Studies/Biotechnology/Biochemistry Hardy-Weinberg principle |
Hard |
| 156 | Which fish, thought to be extinct, was caught in South Africa in 1938? | Biology/Biological Studies/Biotechnology/Biochemistry History of life and human evolution |
Easy |
| 157 | Which hominid is considered the first human-like being and had a brain capacity of about 650–800 cc? | Biology/Biological Studies/Biotechnology/Biochemistry History of life and human evolution |
Easy |
| 158 | Which group of fish is believed to have given rise to the first amphibians? | Biology/Biological Studies/Biotechnology/Biochemistry History of life and human evolution |
Medium |
| 159 | Which hominid buried its dead and lived in near-east and central Asia between about 1,00,000 and 40,000 years… | Biology/Biological Studies/Biotechnology/Biochemistry History of life and human evolution |
Medium |
| 160 | Arrange the following in the order of increasing brain capacity: Homo erectus, Neanderthal man, Homo habilis. | Biology/Biological Studies/Biotechnology/Biochemistry History of life and human evolution |
Hard |
| 161 | Which test is used to confirm typhoid fever? | Biology/Biological Studies/Biotechnology/Biochemistry Common human diseases |
Easy |
| 162 | Which mosquito transmits filariasis? | Biology/Biological Studies/Biotechnology/Biochemistry Common human diseases |
Easy |
| 163 | In malaria, the high recurring fever is caused by the release of | Biology/Biological Studies/Biotechnology/Biochemistry Common human diseases |
Medium |
| 164 | Which organ is infected in pneumonia but not in the common cold? | Biology/Biological Studies/Biotechnology/Biochemistry Common human diseases |
Medium |
| 165 | In a village, many people have amoebic dysentery and the houses have large numbers of houseflies. What role d… | Biology/Biological Studies/Biotechnology/Biochemistry Common human diseases |
Hard |
| 166 | Interferons, which protect non-infected cells from viral infection, belong to which barrier of innate immunit… | Biology/Biological Studies/Biotechnology/Biochemistry Immunity |
Easy |
| 167 | An antibody molecule is represented as | Biology/Biological Studies/Biotechnology/Biochemistry Immunity |
Easy |
| 168 | A person bitten by a snake is given an anti-venom injection. What type of immunity does this provide? | Biology/Biological Studies/Biotechnology/Biochemistry Immunity |
Medium |
| 169 | Which lymphocytes are mainly responsible for rejection of a transplanted organ? | Biology/Biological Studies/Biotechnology/Biochemistry Immunity |
Medium |
| 170 | A child had measles once and never gets it again despite later exposure. Which property of acquired immunity … | Biology/Biological Studies/Biotechnology/Biochemistry Immunity |
Hard |
| 171 | Which type of antibody is produced in allergic reactions? | Biology/Biological Studies/Biotechnology/Biochemistry Vaccination, allergy and autoimmunity |
Easy |
| 172 | Rheumatoid arthritis is an example of | Biology/Biological Studies/Biotechnology/Biochemistry Vaccination, allergy and autoimmunity |
Easy |
| 173 | The hepatitis B vaccine is produced using recombinant DNA technology in | Biology/Biological Studies/Biotechnology/Biochemistry Vaccination, allergy and autoimmunity |
Medium |
| 174 | Which chemicals released from mast cells cause allergy symptoms? | Biology/Biological Studies/Biotechnology/Biochemistry Vaccination, allergy and autoimmunity |
Medium |
| 175 | A person with a deep wound is given anti-tetanus serum instead of the tetanus vaccine. Why? | Biology/Biological Studies/Biotechnology/Biochemistry Vaccination, allergy and autoimmunity |
Hard |
| 176 | HIV belongs to which group of viruses? | Biology/Biological Studies/Biotechnology/Biochemistry AIDS and cancer |
Easy |
| 177 | Which property is lost when normal cells become cancerous? | Biology/Biological Studies/Biotechnology/Biochemistry AIDS and cancer |
Easy |
| 178 | Which cells act as an "HIV factory" in an infected person? | Biology/Biological Studies/Biotechnology/Biochemistry AIDS and cancer |
Medium |
| 179 | The spread of cancer cells from the original tumour to distant sites through the blood is called | Biology/Biological Studies/Biotechnology/Biochemistry AIDS and cancer |
Medium |
| 180 | Why does an AIDS patient suffer from many infections, such as by Mycobacterium and Toxoplasma, that a healthy… | Biology/Biological Studies/Biotechnology/Biochemistry AIDS and cancer |
Hard |
| 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 |