Investigating a factor that affects the rate of enzyme activity Enzymes speed up reactions. They have an area with a very particular shape called the ‘active site’. When the right molecule comes along (substrate molecule) it will fit perfectly into the active site and there will be a reaction. After the reaction the products then leave the active site. This process is often referred to as the lock and key theory as only one enzyme can carry out one type of reaction. The catalase enzyme speeds
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The aim of our investigation is to find out whether the use of different sugar isomers with yeast‚ will affect the rate at which the yeast respires at. The sugars to be tested are fructose‚ galactose‚ glucose‚ lactose and sucrose. Their effects on the respiration rate of yeast to be observed through the measurement (cm3) of the displaced water‚ which will tell us how much CO2 has been respired over 2 minutes. To compare the effects an average will be calculated for each and a result will be drawn
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required to submit some of these for assessment but these are for SJII purposes only and will not form part of your final Biology grade for the IB. Internal Assessment is formal assessment that you are required to complete on your own and will be marked by your teacher. The grades are submitted to the IB and the work will form approx 24% of you final IB Biology mark. These pieces of work are very important and you will have many opportunities to obtained good results. Internal Assessment
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Option F: Microbes and Biotechnology Diversity of Microbe F.1.1 Outline the classification of living organisms into three domains. Three domains of living organisms: 1. Archaea - very primitive; live in extreme habitats 2. Eubacteria - more advanced 3. Eukaryota - all life forms with eukaryotic cells (have a nucleus) Use of ribosomal RNA sequences for classification rRNA is found in all cells rRNA is easy to isolate Analyzed to determine the exact sequence of nucleotide bases
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Population change Saturday‚ April 13‚ 2013 5:18 PM Index Def. Meaning LEDC example MEDC example Crude Birth Rate (CBR) No. of live birth/1000 peo. in pop./year High CBR/TFR: Parents want children: - For labors → Contribute to family income Botswana France: Total Fertility Rate (TFR) Avg. no. of children that Low CBR/TFR: would be born to a - Children are costly woman during her - Good public pension scheme & health services → lifetime No need
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My CAS Diary – Mountain bike riding with Mr. Wright This rather splendid activity I involved myself in took place in the rural district of Yarramundi. I accompanied ‘the boys’‚ Ben Irwin‚ David Wilkinson‚ Jordan Willis‚ Jarrod Quigley‚ Bailey McDougle and John Wright. This group had been forged through a Tabitha elective in which I was not involved with. Despite my absence during the genesis of this group‚ they warmly welcomed me into their ranks‚ as one of their own! They went as far to facilitate
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Competition is essential to achieve efficiency in any market. In an imperfectly competitive market structure‚ however‚ efficiency is lost. The Economist’s article “Let Mexico’s Moguls Battle”‚ describes the lack of competition in the fixed and mobile phone markets in Mexico‚ shows its effects on consumers‚ and outlines the measures taken to promote competition. Figure 1 Figure 1 Telmex and Telcel abuse the lack of competition in the Mexican fixed and mobile phone markets respectively. These “two
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The most unusual thing I ever stole? A snowman Midnight. He looked magnificent; a tall‚ white mute beneath the winter moon. I wanted him‚ a mate with a mind as cold as the slice of ice within my own brain. I started with the Better off dead than giving in‚ not taking what you want. He weighed a ton; his torso‚ frozen stiff‚ hugged to my chest‚ a fierce chill piercing my gut. Part of the thrill was knowing that children would cry in the morning. Life’s tough. Sometimes I steal
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Written Task The downfall. The cold pouring rain had finally stopped. The man who several years ago were used to be Winston Smith was walking down the narrow street closely to his apartment in Victory Mansions. It was the year 1989‚ or at least he thought so. It has been raining for days‚ or even weeks‚ it doesn’t matter. The noise of bombs turning buildings into dust was very often in that week‚ and they were dangerously close to the part of the city where most of the party members were relocated
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LOG INVESTIGATION 1. INTRODUCTION The following assessment aims to investigate logarithms and several different expressions. The following sequences (from now on referred to as P roblem1 ) is in the form of an = logmn mk ‚ where n represents the term number and an represents the given answer. 1. a1 = log2 8‚ a2 = log4 8‚ a3 = log8 8‚ a4 = log16 8‚ a5 = log32 8‚ ... 2. a1 = log3 81‚ a2 = log9 81‚ a3 = log27 81‚ a4 = log81 81‚ ... 3. a1 = log5 25‚ a2 = log25 25‚ a3 = log125 25‚ a4 = log625
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