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INTERNATIONAL BACCALAUREATE ESSAYS
Separation of pigments of photosynthesis using paper chromatography.
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Coal (main aim): Calculating the Rf of every single pigment, in order to distinguish it and identify its solubility. Hypothesis: In photosynthesis; two types of pigments are involved; chlorophyll (A or B) and carotenoids, by using paper chromatography we can distinguish each pigment, by measuring the color's Rf; referring to the next formula: Variables: Independent variable: Pigment solubility
Effect of acid rain on seed germination
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Aim: To stimulate the effect of acid rain on plant life, students to set up a lab experiment to compare the effect of varying levels of acidity on plant seed germination. Hypothesis: As the pH of water decreases, the number of seeds germinated will reduce
The effect of concentration of blackcurrant squash on osmosis in chipped potatoes
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ResearchQuestion What is the effect of concentration of blackcurrant squash on osmosis in chipped potatoes? A plant cellmembrane is partially permeable which allows water to move across called osmosis. Six different concentrations of blackcurrant squash (0%, 20%, 40%, 60%, 80% and 100%) will be used to see the effect on osmosis in chipped potatoes
Enzyme activity in liver and potato tissue
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Design: Problem: Which tissue (liver or potato) has more catalase/peroxidase? Hypothesis: If liver and potato tissue are tested for the amount of catalase and peroxidase, then it will show that liver tissue has more catalase than potato tissue has peroxidase. Variables: l
How does the concentration of a sugar solution affect the mass of a potato?
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Introduction: The aim of this investigation is to examine the difference in the mass of potato after keeping the in sugar solutions of different concentrations for 24 hours. The water potential will also be calculated
Testing the effect of characteristics of leaves on the transpiration rate of rubiaceae, verbenaceae, oleaceae, and rutaceae
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Introduction There is significant difference between plants and animals. It is generally a plant that produces its own food while an animal has to consume other organisms whether plants or other animals
Testing the solute concentration of potato cells
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Introduction A potato is a plant, and thus it, a living organism, consists of plant cells. Like all cells, plant cells are also the smallest form of life, which means to be able to repro duce by themselves
Distinguish between rna and dna bacteria and immunity
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DNA and RNA both consist of chains of nucleotides, each composed of a sugar, a base and a phosphate. There are differences between them
Influencing the rate of photosynthesis with light intensity and carbon dioxide concentration
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Introduction Photosynthesis is the process plants use to produce organic molecules, usually carbohydrates, from carbon dioxide and water by using sunlight or an alternative source of light. The light is used as energy which is absorbed by chlorophyll in the chloroplast of plants
Dna extraction will yield the most dna, and which fruit contains the most dna
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Introduction Research Question: Which method of DNA extraction (using a centrifuge or not) will yield the most DNA, and which fruit (banana, papaya, or strawberry) contains the most DNA? The aim of this investigation is to extract DNA from three organic sources using two methods of extraction in order to determine how much DNA is contained in each source and which method is most effective in extracting DNA. For this investigation, the three sources of DNA are papaya, strawberry, and banana
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