Question bank
Filter questions by subject, topic and difficulty. Open any question to answer it and see the explanation.
Log in to answer these questions and see the explanations.Create free accountLog in
| # | Question | Subject and topic | Difficulty |
|---|---|---|---|
| 1651 | 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 |
| 1652 | 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 |
| 1653 | Compared with traditional hybridisation, the main advantage of genetic engineering is that it | Biology/Biological Studies/Biotechnology/Biochemistry Principles of biotechnology |
Medium |
| 1654 | 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 |
| 1655 | In the name EcoRI, what does the letter R stand for? | Biology/Biological Studies/Biotechnology/Biochemistry Tools of recombinant DNA technology |
Easy |
| 1656 | During agarose gel electrophoresis, DNA fragments move towards the anode because they | Biology/Biological Studies/Biotechnology/Biochemistry Tools of recombinant DNA technology |
Easy |
| 1657 | 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 |
| 1658 | In blue–white selection, colourless colonies on a chromogenic substrate indicate that | Biology/Biological Studies/Biotechnology/Biochemistry Tools of recombinant DNA technology |
Medium |
| 1659 | 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 |
| 1660 | Which enzyme is used to break open fungal cells when isolating their DNA? | Biology/Biological Studies/Biotechnology/Biochemistry Processes of recombinant DNA technology |
Easy |
| 1661 | Taq polymerase is preferred in PCR mainly because it | Biology/Biological Studies/Biotechnology/Biochemistry Processes of recombinant DNA technology |
Easy |
| 1662 | 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 |
| 1663 | 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 |
| 1664 | 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 |
| 1665 | Which part of a virus-infected plant is cultured to obtain virus-free plants? | Biology/Biological Studies/Biotechnology/Biochemistry Applications in agriculture |
Easy |
| 1666 | The proteins coded by the genes cryIAc and cryIIAb are effective against | Biology/Biological Studies/Biotechnology/Biochemistry Applications in agriculture |
Easy |
| 1667 | Bt toxin does not kill the Bacillus thuringiensis cells that make it because | Biology/Biological Studies/Biotechnology/Biochemistry Applications in agriculture |
Medium |
| 1668 | Golden rice has been genetically modified mainly to improve its content of | Biology/Biological Studies/Biotechnology/Biochemistry Applications in agriculture |
Medium |
| 1669 | In transgenic tobacco made resistant to Meloidogyne incognita, the nematode dies because | Biology/Biological Studies/Biotechnology/Biochemistry Applications in agriculture |
Hard |
| 1670 | Human insulin consists of chains A and B held together by | Biology/Biological Studies/Biotechnology/Biochemistry Applications in medicine |
Easy |
| 1671 | The first clinical gene therapy, given in 1990, treated a deficiency of which enzyme? | Biology/Biological Studies/Biotechnology/Biochemistry Applications in medicine |
Easy |
| 1672 | 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 |
| 1673 | 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 |
| 1674 | 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 |
| 1675 | Which animal makes up the large majority of transgenic animals produced so far? | Biology/Biological Studies/Biotechnology/Biochemistry Transgenic animals |
Easy |
| 1676 | Rosie, the first transgenic cow, produced milk enriched with | Biology/Biological Studies/Biotechnology/Biochemistry Transgenic animals |
Easy |
| 1677 | Human α-1-antitrypsin produced in transgenic animals is used to treat | Biology/Biological Studies/Biotechnology/Biochemistry Transgenic animals |
Medium |
| 1678 | Why are transgenic animals that are more sensitive to toxic substances used for chemical safety testing? | Biology/Biological Studies/Biotechnology/Biochemistry Transgenic animals |
Medium |
| 1679 | 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 |
| 1680 | 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 |
| 1681 | 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 |
| 1682 | 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 |
| 1683 | Developing countries like India are particularly vulnerable to biopiracy mainly because they | Biology/Biological Studies/Biotechnology/Biochemistry Ethical issues |
Medium |
| 1684 | Which concern most directly falls under biosafety rather than patents or biopiracy? | Biology/Biological Studies/Biotechnology/Biochemistry Ethical issues |
Hard |
| 1685 | 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 |
| 1686 | Which of the following is an attribute of a population but not of an individual organism? | Biology/Biological Studies/Biotechnology/Biochemistry Population attributes |
Easy |
| 1687 | 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 |
| 1688 | 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 |
| 1689 | 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 |
| 1690 | Which equation describes logistic population growth? | Biology/Biological Studies/Biotechnology/Biochemistry Population growth |
Easy |
| 1691 | A population growing with unlimited resources produces which kind of growth curve? | Biology/Biological Studies/Biotechnology/Biochemistry Population growth |
Easy |
| 1692 | 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 |
| 1693 | Which organism breeds only once in its lifetime? | Biology/Biological Studies/Biotechnology/Biochemistry Population growth |
Medium |
| 1694 | 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 |
| 1695 | The relationship between a cuckoo and a crow, in which the crow incubates the cuckoo's eggs, is called | Biology/Biological Studies/Biotechnology/Biochemistry Population interactions |
Easy |
| 1696 | In which interaction does one species benefit while the other is neither harmed nor benefited? | Biology/Biological Studies/Biotechnology/Biochemistry Population interactions |
Easy |
| 1697 | Five closely related warbler species live in the same tree, but each feeds in a different part of the canopy.… | Biology/Biological Studies/Biotechnology/Biochemistry Population interactions |
Medium |
| 1698 | Which pair shows mutualism? | Biology/Biological Studies/Biotechnology/Biochemistry Population interactions |
Medium |
| 1699 | A prickly pear cactus introduced into Australia spread rapidly over large areas until a cactus-feeding moth f… | Biology/Biological Studies/Biotechnology/Biochemistry Population interactions |
Hard |
| 1700 | The vertical distribution of different plant species at different heights in a forest is called | Biology/Biological Studies/Biotechnology/Biochemistry Structure and function of ecosystems |
Easy |