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295 questions found · practise this subject as a set
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| # | Question | Subject and topic | Difficulty |
|---|---|---|---|
| 121 | In the lac operon, which gene codes for β-galactosidase? | Biology/Biological Studies/Biotechnology/Biochemistry Regulation of gene expression |
Easy |
| 122 | What is the role of lactose in the lac operon? | Biology/Biological Studies/Biotechnology/Biochemistry Regulation of gene expression |
Easy |
| 123 | In the absence of lactose, the lac operon is switched off because | Biology/Biological Studies/Biotechnology/Biochemistry Regulation of gene expression |
Medium |
| 124 | Regulation of the lac operon by the repressor is an example of | Biology/Biological Studies/Biotechnology/Biochemistry Regulation of gene expression |
Medium |
| 125 | A mutant E. coli has a repressor that cannot bind lactose but can still bind the operator. What will happen w… | Biology/Biological Studies/Biotechnology/Biochemistry Regulation of gene expression |
Hard |
| 126 | In which year was the Human Genome Project completed? | Biology/Biological Studies/Biotechnology/Biochemistry Human Genome Project and DNA fingerprinting |
Easy |
| 127 | Which human chromosome was found to have the fewest genes? | Biology/Biological Studies/Biotechnology/Biochemistry Human Genome Project and DNA fingerprinting |
Easy |
| 128 | The probe used by Alec Jeffreys for DNA fingerprinting was based on | Biology/Biological Studies/Biotechnology/Biochemistry Human Genome Project and DNA fingerprinting |
Medium |
| 129 | What is the correct order of steps in DNA fingerprinting? | Biology/Biological Studies/Biotechnology/Biochemistry Human Genome Project and DNA fingerprinting |
Medium |
| 130 | Why can DNA fingerprinting distinguish between two individuals even though 99.9% of their bases are identical? | Biology/Biological Studies/Biotechnology/Biochemistry Human Genome Project and DNA fingerprinting |
Hard |
| 131 | Which scientist disproved spontaneous generation using pre-sterilised flasks? | Biology/Biological Studies/Biotechnology/Biochemistry Origin of life |
Easy |
| 132 | Which gases did Miller use in his experiment along with water vapour? | Biology/Biological Studies/Biotechnology/Biochemistry Origin of life |
Easy |
| 133 | What was the main product detected in Miller's original experiment? | Biology/Biological Studies/Biotechnology/Biochemistry Origin of life |
Medium |
| 134 | Oparin and Haldane proposed that the first life was preceded by | Biology/Biological Studies/Biotechnology/Biochemistry Origin of life |
Medium |
| 135 | Why was the early Earth's atmosphere important for Miller's results? | Biology/Biological Studies/Biotechnology/Biochemistry Origin of life |
Hard |
| 136 | The forelimbs of a whale, a bat and a human are examples of | Biology/Biological Studies/Biotechnology/Biochemistry Evidence for evolution |
Easy |
| 137 | The wings of a butterfly and of a bird are | Biology/Biological Studies/Biotechnology/Biochemistry Evidence for evolution |
Easy |
| 138 | The thorn of Bougainvillea and the tendril of Cucurbita illustrate | Biology/Biological Studies/Biotechnology/Biochemistry Evidence for evolution |
Medium |
| 139 | In industrial areas of England, dark moths became more common after 1850 mainly because | Biology/Biological Studies/Biotechnology/Biochemistry Evidence for evolution |
Medium |
| 140 | Which pair shows convergent evolution? | Biology/Biological Studies/Biotechnology/Biochemistry Evidence for evolution |
Hard |