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295 questions found · practise this subject as a set
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| # | Question | Subject and topic | Difficulty |
|---|---|---|---|
| 201 | Which organism is commonly used as a biocontrol agent against aphids? | Biology/Biological Studies/Biotechnology/Biochemistry Biocontrol agents and biofertilisers |
Easy |
| 202 | Which of the following is a free-living nitrogen-fixing bacterium used as a biofertiliser? | Biology/Biological Studies/Biotechnology/Biochemistry Biocontrol agents and biofertilisers |
Easy |
| 203 | The main benefit a plant gets from a mycorrhizal fungus such as Glomus is | Biology/Biological Studies/Biotechnology/Biochemistry Biocontrol agents and biofertilisers |
Medium |
| 204 | Cyanobacteria are especially valued as biofertilisers in | Biology/Biological Studies/Biotechnology/Biochemistry Biocontrol agents and biofertilisers |
Medium |
| 205 | A farmer practising integrated pest management wants an agent that kills a specific insect pest but spares be… | Biology/Biological Studies/Biotechnology/Biochemistry Biocontrol agents and biofertilisers |
Hard |
| 206 | In 1972, the first recombinant DNA was constructed by | Biology/Biological Studies/Biotechnology/Biochemistry Principles of biotechnology |
Easy |
| 207 | Which DNA sequence is responsible for starting replication of a cloned gene inside a host cell? | Biology/Biological Studies/Biotechnology/Biochemistry Principles of biotechnology |
Easy |
| 208 | Keeping a fermentation vessel free of unwanted microbes while growing only the desired cells in bulk is the m… | Biology/Biological Studies/Biotechnology/Biochemistry Principles of biotechnology |
Medium |
| 209 | Compared with traditional hybridisation, the main advantage of genetic engineering is that it | Biology/Biological Studies/Biotechnology/Biochemistry Principles of biotechnology |
Medium |
| 210 | A researcher injects a linear fragment of human DNA, with no origin of replication, into a bacterial cell. Wh… | Biology/Biological Studies/Biotechnology/Biochemistry Principles of biotechnology |
Hard |
| 211 | In the name EcoRI, what does the letter R stand for? | Biology/Biological Studies/Biotechnology/Biochemistry Tools of recombinant DNA technology |
Easy |
| 212 | During agarose gel electrophoresis, DNA fragments move towards the anode because they | Biology/Biological Studies/Biotechnology/Biochemistry Tools of recombinant DNA technology |
Easy |
| 213 | A foreign gene is inserted at the BamH I site of pBR322 and the plasmid is put into E. coli. Recombinant colo… | Biology/Biological Studies/Biotechnology/Biochemistry Tools of recombinant DNA technology |
Medium |
| 214 | In blue–white selection, colourless colonies on a chromogenic substrate indicate that | Biology/Biological Studies/Biotechnology/Biochemistry Tools of recombinant DNA technology |
Medium |
| 215 | Why is a vector with several recognition sites for the same restriction enzyme unsuitable for cloning? | Biology/Biological Studies/Biotechnology/Biochemistry Tools of recombinant DNA technology |
Hard |
| 216 | Which enzyme is used to break open fungal cells when isolating their DNA? | Biology/Biological Studies/Biotechnology/Biochemistry Processes of recombinant DNA technology |
Easy |
| 217 | Taq polymerase is preferred in PCR mainly because it | Biology/Biological Studies/Biotechnology/Biochemistry Processes of recombinant DNA technology |
Easy |
| 218 | Starting from a single double-stranded DNA molecule, how many copies of the target sequence can ideally be ob… | Biology/Biological Studies/Biotechnology/Biochemistry Processes of recombinant DNA technology |
Medium |
| 219 | Purified DNA is made to precipitate out of solution as fine threads by adding | Biology/Biological Studies/Biotechnology/Biochemistry Processes of recombinant DNA technology |
Medium |
| 220 | In a continuous-culture bioreactor, used medium is drained out and fresh medium is added. The main purpose is… | Biology/Biological Studies/Biotechnology/Biochemistry Processes of recombinant DNA technology |
Hard |
| 221 | Which part of a virus-infected plant is cultured to obtain virus-free plants? | Biology/Biological Studies/Biotechnology/Biochemistry Applications in agriculture |
Easy |
| 222 | The proteins coded by the genes cryIAc and cryIIAb are effective against | Biology/Biological Studies/Biotechnology/Biochemistry Applications in agriculture |
Easy |
| 223 | Bt toxin does not kill the Bacillus thuringiensis cells that make it because | Biology/Biological Studies/Biotechnology/Biochemistry Applications in agriculture |
Medium |
| 224 | Golden rice has been genetically modified mainly to improve its content of | Biology/Biological Studies/Biotechnology/Biochemistry Applications in agriculture |
Medium |
| 225 | In transgenic tobacco made resistant to Meloidogyne incognita, the nematode dies because | Biology/Biological Studies/Biotechnology/Biochemistry Applications in agriculture |
Hard |
| 226 | Human insulin consists of chains A and B held together by | Biology/Biological Studies/Biotechnology/Biochemistry Applications in medicine |
Easy |
| 227 | The first clinical gene therapy, given in 1990, treated a deficiency of which enzyme? | Biology/Biological Studies/Biotechnology/Biochemistry Applications in medicine |
Easy |
| 228 | In the body, insulin is first made as pro-insulin. Which part must be removed to give mature insulin? | Biology/Biological Studies/Biotechnology/Biochemistry Applications in medicine |
Medium |
| 229 | A doctor wants to detect HIV in a person infected so recently that the viral load is still very low. Which te… | Biology/Biological Studies/Biotechnology/Biochemistry Applications in medicine |
Medium |
| 230 | A child with ADA deficiency treated by gene therapy needs repeated infusions of engineered lymphocytes because | Biology/Biological Studies/Biotechnology/Biochemistry Applications in medicine |
Hard |
| 231 | Which animal makes up the large majority of transgenic animals produced so far? | Biology/Biological Studies/Biotechnology/Biochemistry Transgenic animals |
Easy |
| 232 | Rosie, the first transgenic cow, produced milk enriched with | Biology/Biological Studies/Biotechnology/Biochemistry Transgenic animals |
Easy |
| 233 | Human α-1-antitrypsin produced in transgenic animals is used to treat | Biology/Biological Studies/Biotechnology/Biochemistry Transgenic animals |
Medium |
| 234 | Why are transgenic animals that are more sensitive to toxic substances used for chemical safety testing? | Biology/Biological Studies/Biotechnology/Biochemistry Transgenic animals |
Medium |
| 235 | A research team wants to test whether a new treatment slows the progress of Alzheimer's disease before trying… | Biology/Biological Studies/Biotechnology/Biochemistry Transgenic animals |
Hard |
| 236 | In India, the body that decides on the validity of GM research and the safety of releasing GM organisms is | Biology/Biological Studies/Biotechnology/Biochemistry Ethical issues |
Easy |
| 237 | The use of a country's bio-resources by companies without proper authorisation or fair compensation is called | Biology/Biological Studies/Biotechnology/Biochemistry Ethical issues |
Easy |
| 238 | A foreign firm patents a skin cream based on the healing use of turmeric that villagers in India have known f… | Biology/Biological Studies/Biotechnology/Biochemistry Ethical issues |
Medium |
| 239 | Developing countries like India are particularly vulnerable to biopiracy mainly because they | Biology/Biological Studies/Biotechnology/Biochemistry Ethical issues |
Medium |
| 240 | Which concern most directly falls under biosafety rather than patents or biopiracy? | Biology/Biological Studies/Biotechnology/Biochemistry Ethical issues |
Hard |
| 241 | A country's age pyramid is urn-shaped, with a narrow base. What does this suggest about its population? | Biology/Biological Studies/Biotechnology/Biochemistry Population attributes |
Easy |
| 242 | Which of the following is an attribute of a population but not of an individual organism? | Biology/Biological Studies/Biotechnology/Biochemistry Population attributes |
Easy |
| 243 | A pond had 40 frogs at the start of a year, and 10 new frogs were added by reproduction during the year. What… | Biology/Biological Studies/Biotechnology/Biochemistry Population attributes |
Medium |
| 244 | In a laboratory population of 50 fruit flies, 5 flies died during a week. What is the death rate? | Biology/Biological Studies/Biotechnology/Biochemistry Population attributes |
Medium |
| 245 | An ecologist wants to compare the size of a population of one huge banyan tree with that of 200 small Parthen… | Biology/Biological Studies/Biotechnology/Biochemistry Population attributes |
Hard |
| 246 | Which equation describes logistic population growth? | Biology/Biological Studies/Biotechnology/Biochemistry Population growth |
Easy |
| 247 | A population growing with unlimited resources produces which kind of growth curve? | Biology/Biological Studies/Biotechnology/Biochemistry Population growth |
Easy |
| 248 | A population has 500 individuals. During a year there are 60 births, 40 deaths, 10 immigrants and 20 emigrant… | Biology/Biological Studies/Biotechnology/Biochemistry Population growth |
Medium |
| 249 | Which organism breeds only once in its lifetime? | Biology/Biological Studies/Biotechnology/Biochemistry Population growth |
Medium |
| 250 | A population follows logistic growth with r = 0.5 per year and carrying capacity K = 1000. What is its growth… | Biology/Biological Studies/Biotechnology/Biochemistry Population growth |
Hard |