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| # | Question | Subject and topic | Difficulty |
|---|---|---|---|
| 1561 | The fact that some amino acids are coded by more than one codon shows that the genetic code is | Biology/Biological Studies/Biotechnology/Biochemistry Genetic code and translation |
Easy |
| 1562 | Which part of a tRNA recognises the codon on mRNA? | Biology/Biological Studies/Biotechnology/Biochemistry Genetic code and translation |
Medium |
| 1563 | The coding region of an mRNA, from the start codon AUG to the stop codon (both included), has 300 nucleotides… | Biology/Biological Studies/Biotechnology/Biochemistry Genetic code and translation |
Medium |
| 1564 | In bacteria, which molecule catalyses peptide bond formation during translation? | Biology/Biological Studies/Biotechnology/Biochemistry Genetic code and translation |
Hard |
| 1565 | In the lac operon, which gene codes for β-galactosidase? | Biology/Biological Studies/Biotechnology/Biochemistry Regulation of gene expression |
Easy |
| 1566 | What is the role of lactose in the lac operon? | Biology/Biological Studies/Biotechnology/Biochemistry Regulation of gene expression |
Easy |
| 1567 | In the absence of lactose, the lac operon is switched off because | Biology/Biological Studies/Biotechnology/Biochemistry Regulation of gene expression |
Medium |
| 1568 | Regulation of the lac operon by the repressor is an example of | Biology/Biological Studies/Biotechnology/Biochemistry Regulation of gene expression |
Medium |
| 1569 | 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 |
| 1570 | In which year was the Human Genome Project completed? | Biology/Biological Studies/Biotechnology/Biochemistry Human Genome Project and DNA fingerprinting |
Easy |
| 1571 | Which human chromosome was found to have the fewest genes? | Biology/Biological Studies/Biotechnology/Biochemistry Human Genome Project and DNA fingerprinting |
Easy |
| 1572 | The probe used by Alec Jeffreys for DNA fingerprinting was based on | Biology/Biological Studies/Biotechnology/Biochemistry Human Genome Project and DNA fingerprinting |
Medium |
| 1573 | What is the correct order of steps in DNA fingerprinting? | Biology/Biological Studies/Biotechnology/Biochemistry Human Genome Project and DNA fingerprinting |
Medium |
| 1574 | 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 |
| 1575 | Which scientist disproved spontaneous generation using pre-sterilised flasks? | Biology/Biological Studies/Biotechnology/Biochemistry Origin of life |
Easy |
| 1576 | Which gases did Miller use in his experiment along with water vapour? | Biology/Biological Studies/Biotechnology/Biochemistry Origin of life |
Easy |
| 1577 | What was the main product detected in Miller's original experiment? | Biology/Biological Studies/Biotechnology/Biochemistry Origin of life |
Medium |
| 1578 | Oparin and Haldane proposed that the first life was preceded by | Biology/Biological Studies/Biotechnology/Biochemistry Origin of life |
Medium |
| 1579 | Why was the early Earth's atmosphere important for Miller's results? | Biology/Biological Studies/Biotechnology/Biochemistry Origin of life |
Hard |
| 1580 | The forelimbs of a whale, a bat and a human are examples of | Biology/Biological Studies/Biotechnology/Biochemistry Evidence for evolution |
Easy |