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MainRostand last won the day on September 4 2013

MainRostand had the most liked content!

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    Nov 2014
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  1. Well, just try to look for information that gives you a lot of quantitative data for you to comment on. Good raw data that you can process and make into graphs is the basis for any good discussion and, overall, good IAs, in my humble opinion
  2. I know that copper, being a transition metal, usually speeds up the rate of a reaction (at least inorganic ones). But in the case of a biological catalyst, like catalase, are you sure that it has an effect? If it does, then great. By the way, what will be your independent variable there, because it seems like just comparing the reaction with and without CuSO4 will give you little data to discuss later. Measuring the amount of oxygen produced can be done by making the reaction take place inside of a sealed beaker with a hole connecting it to a syringe (or inverted measuring cylinder inside of water) with a hose. This way you can measure the volume of oxygen produced as the time goes by and graph these curves.
  3. Hi! Can you share it with me, please?
  4. Well, to know what a competitive inhibitor or non-competitive inhibitor is for those particular catalases you would need to look into the biochemistry of the enzyme itself. AKA Research. I don't even know if there are any common inhibitors for those enzymes. See, competitive inhibitors are those that compete with the substrate to occupy the active site of the enzyme. On the other hand, non-competitive inhibitors will usually act either on an allosteric site of the enzyme (if I'm not mistaken) or on the enzyme-substrate complex itself to prevent it from separating. I think you should a little bit into competitive inhibition and non-competitive inhibition experiments that are done in biochemistry to get experimental results and get your possible "materials" from there.
  5. I also recommend you to memorize a few case studies for each of the topics. November 2014 exams asked for a couple of these, especially in the extended response essay questions (paper 2), so it might be useful to copy a couple out of your course companion and know them by heart or to look a couple up.
  6. I feel like this topic would be much better for an IA than for an EE. (I did something similar with hypochlorite ion concentrations in bleach products). Unless you take the idea of oleic acid further and compare it to other insaturated oils, determine something like iodine numbers for each and see how it affects the boiling points or somethig else (boiling point seems a little too simple, in my opinion). This is just an idea, take it from there
  7. To be honest, I would advise against choosing Genetics as your topic. Why? Because in order to get a better grade it is recommended that you perform an experiment, and an experiment in Genetics is either really complex and difficult or really long term (like having multiple generations to observe heritable traits). So, unless you want to write a research based EE (which wouldnt be the worst of ideas either), I'd recommend another topic. Apart from that, I wouldn't be able to help you come up woth a topic in genetics either way, because you are supposed to do that (it's part of the task).
  8. Well your idea is pretty good. But "characterization" is extremely broad. I mean, every book does that inevitably. You need to explore an aspect in detail, so you could, for instance, explore a single character and the symbolism it conveys to enforce the selected theme. You could also look at the function of the character inside of the novel/play/story and how certain symbolic actions give it a role in the play's plot to push a theme through.
  9. Umm, the idea of population growth, especially for yeasts, is pretty common. In spite of this, I dont think it is a bad idea for a lab. You could investigate factors like substrate concentration (perhaps linking it to fermentation) or pH conditions.
  10. Biology, after a while, becomes a piece of cake if you find your sweet tooth for it. I recommend you to read the book every time you have the chance. If you are good at retaining information, then read the whole chapter you have a test on before the test. Get a bunch of past paper questions or question bank questions for each of the topics and answer as many as you can. This will prepare you for many different situations. Also, note down important definitions that the Assessment Statements require you to know, such as those for "Evolution" or "Nutrition". Finally, I recommend getting Bioninja on your smartphone/iPhone, if you have one. Every time you have a few spare minutes, read on that app on the topic you are dealing with or trying to memorize. It is pretty concise and doesn't give much detail, but it is good to help you remember previously studied topics.
  11. How can your raw data be the same as someone else's? What kind of data are you collecting. Either way, graphs are a way of visually representing YOUR data, and I think they award you marks for them so, no, I wouldnt advise using other people's graphs. What work would you be doing? I used charts to show Critical value tables for my statistical analysis and I cited them, but that was just to show where I selected the value from.
  12. On your first idea: I think it would be pretty difficult to quantify the responses of your test subjects. In my opinion it would give it a little bit of a "science fair" tone and maybe preparing a scale to get quantitative data will turn out to be much harder than you thought. 2: Amount of CO2 prouced by photosynthesis? Uh, that is a little bit... paradoxic. Plants produce carbon dioxide when they carry out respiration, not photosynthesis. And photosythetic activity would probably drain all of the CO2 produced by respiration either way, so quantifying that would be very hard. In my experience, Biology SL does not require that much "give it your own twist", so investigating some simple factors that affect photosynthesis wouldn't go wrong. I sent off a design measuring rate of photosynthesis at different CO2 concentrations and it turned out pretty well.
  13. Oh wow, well, the two weeks before the IA deadlines were the most terrible weeks of last year. I had to complete all of the reports for my three science courses, study and prepare my TOK presentation at the same time. I pulled serial allnighters all the time those weeks. I basically slept 45 minutes and then woke up to continue working on my IAs. I drank so much coffee that my bladder was working every half an hour. Oh those days... :/
  14. What- I've been teaching poor kids how to read and do maths these two years and people get to play LoL instead? Sometimes I wonder what's up with the IB lol
  15. Well, your topic is, indeed, very broad. Talking about all life is VEEERY general! Im guessing this EE is research-based, which isnt that bad, but I've seen a lot of people recommend that if you're doing an EE on one of the experimental sciences, you should carry out your experiment. (That's what Im doing/did at least)

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