Impacts of humans on ecosystems
Impacts of humans on ecosystems
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Questions and Answers For
IB Biology
662 Questions
How has scientific research contributed to changing public perceptions of smoking, and what role do scientists play in informing the public about the health risks?
How has scientific research contributed to changing public perceptions of smoking, and what role do scientists play in informing the public about the health risks?
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How can pneumocytes, capillary endothelium cells, and blood cells be identified in light micrographs and electron micrographs of lung tissue?
How can pneumocytes, capillary endothelium cells, and blood cells be identified in light micrographs and electron micrographs of lung tissue?
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How do dissociation curves for hemoglobin and myoglobin differ, and what can these differences tell us about oxygen storage and release in tissues?
How do dissociation curves for hemoglobin and myoglobin differ, and what can these differences tell us about oxygen storage and release in tissues?
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What are the causes and treatments of emphysema, and how does this disease affect gas exchange in the lungs?
What are the causes and treatments of emphysema, and how does this disease affect gas exchange in the lungs?
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Why is it important for the pH of blood to stay within the narrow range of 7.35 to 7.45, and how is this regulated?
Why is it important for the pH of blood to stay within the narrow range of 7.35 to 7.45, and how is this regulated?
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What are the consequences of high altitude on gas exchange, and how does the body adapt to reduced oxygen levels?
What are the consequences of high altitude on gas exchange, and how does the body adapt to reduced oxygen levels?
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How does fetal hemoglobin differ from adult hemoglobin, and how does this difference enable the transfer of oxygen in the placenta?
How does fetal hemoglobin differ from adult hemoglobin, and how does this difference enable the transfer of oxygen in the placenta?
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How does the rate of ventilation change during exercise in response to the amount of CO2 in the blood?
How does the rate of ventilation change during exercise in response to the amount of CO2 in the blood?
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How does the respiratory control center in the medulla oblongata regulate the rate of ventilation?
How does the respiratory control center in the medulla oblongata regulate the rate of ventilation?
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Top Questions
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Discuss the advantages and disadvantages of genetically modifying crops, including soya, maize and rice
Genetically modified (GM) crops, such as soybeans, maize, and rice,
Sourav
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Outline the process of genetic modification using bacterial production of a human protein as an example, limited to: (a) isolation of the DNA making up a human gene using restriction enzymes, forming sticky ends (b) cutting of bacterial plasmid DNA with the same restriction enzymes, forming complementary sticky ends (c) insertion of human DNA into bacterial plasmid DNA using DNA ligase to form a recombinant plasmid (d) insertion of recombinant plasmids into bacteria (specific details are not required) (e) multiplication of bacteria containing recombinant plasmids (f) expression in bacteria of the human gene to make the human protein
<h2 class="mb-2 mt-6 text-lg first:mt-3">Process of Genetic Modification Using Bacterial
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Outline examples of genetic modification: (a) the insertion of human genes into bacteria to produce human proteins (b) the insertion of genes into crop plants to confer resistance to herbicides (c) the insertion of genes into crop plants to confer resistance to insect pests (d) the insertion of genes into crop plants to improve nutritional qualities
<h2 class="mb-2 mt-6 text-lg first:mt-3">Examples of Genetic Modification</h2> Genetic modification involves
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Describe genetic modification as changing the genetic material of an organism by removing, changing or inserting individual genes
Genetic modification (GM) refers to the deliberate alteration of an
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Describe and explain the conditions that need to be controlled in a fermenter, including: temperature, pH, oxygen, nutrient supply and waste products
<h2 class="mb-2 mt-6 text-lg first:mt-3">Conditions to Control in a Fermenter</h2> Fermenters
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Describe how fermenters can be used for the large-scale production of useful products by bacteria and fungi, including insulin, penicillin and mycoprotein
<h2 class="mb-2 mt-6 text-lg first:mt-3">The Use of Fermenters for Large-Scale
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Explain the use of lactase to produce lactosefree milk
<h2 class="mb-2 mt-6 text-lg first:mt-3">The Use of Lactase to Produce
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