What trends and discrepancies exist in cell theory, and why do some organisms not conform to it?
What trends and discrepancies exist in cell theory, and why do some organisms not conform to it?
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Questions and Answers For
IB Biology
662 Questions
How can a light microscope be used to investigate cell and tissue structure, and what steps are involved in drawing cells, calculating magnification, and determining the actual size of structures seen in drawings or micrographs?
How can a light microscope be used to investigate cell and tissue structure, and what steps are involved in drawing cells, calculating magnification, and determining the actual size of structures seen in drawings or micrographs?
1 Answer
Ethics of the therapeutic use of stem cells from specially created embryos, from the umbilical cord blood of a newborn baby and from an adult’s own tissues.
Ethics of the therapeutic use of stem cells from specially created embryos, from the umbilical cord blood of a newborn baby and from an adult’s own tissues.
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Use of stem cells to treat Stargardt’s disease and one other named condition.
Use of stem cells to treat Stargardt’s disease and one other named condition.
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Investigation of functions of life in Paramecium and one named photosynthetic unicellular organism.
Investigation of functions of life in Paramecium and one named photosynthetic unicellular organism.
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Questioning the cell theory using atypical examples, including striated muscle, giant algae and aseptate fungal hyphae.
Questioning the cell theory using atypical examples, including striated muscle, giant algae and aseptate fungal hyphae.
1 Answer
Explain – The capacity of stem cells to divide and differentiate along different pathways is necessary in embryonic development and also makes stem cells suitable for therapeutic uses.
Explain – The capacity of stem cells to divide and differentiate along different pathways is necessary in embryonic development and also makes stem cells suitable for therapeutic uses.
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Describe That Differentiation involves the expressions of some genes and not others in a cell’s genome.
Describe That Differentiation involves the expressions of some genes and not others in a cell’s genome.
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Describe Specialized tissues can develop by cell differentiation in multicellular organisms.
Describe Specialized tissues can develop by cell differentiation in multicellular organisms.
1 Answer
Multicellular organisms have properties that emerge due to the interaction of their cellular components.
Multicellular organisms have properties that emerge due to the interaction of their cellular components.
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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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