THE EFFECT OF CHANGE IN pH ON THE ACTIVITY OF ENZYMES Introduction: Enzymes are catalysts that speed up‚ and control chemical reactions within a cell and break down complex molecules into smaller ones. Some of the chemical reactions that take place in the body produce toxic by-products which need to be converted. The liver produces hydrogen peroxide‚ which is extremely poisonous. When the catalase comes in contact with the hydrogen peroxide‚ it is broken down into water and oxygen. Aim:
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AP Biology Fly Lab Write Up Make sure you obtained your F2 generation information from your group to complete the questions on your lab handout. I will be grading all of the tables and questions in your lab. Being able to write a null hypothesis will be extremely important in college so make sure to take your time and do it right ( Remember that the null hypothesis needs to be in an “If…then…because” format. • Ex. If I cross ___________then a ratio of ________should be expected because
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Materials and Methods In the experiment‚ a frog was obtained and dissected in a way to expose its heart and then tested using Lab Tutor software‚ a force transducer‚ and the PowerLab hardware (ADInstruments 2014). Frog dissection: Frogs that had been killed by being double-pithed were dissected as described in Lab Tutor. The frog was pinned down with the ventral side up. A longitudinal and a lateral incision were made along the frog’s abdomen. The skin was peeled back and the tissue and sternum
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Lab 5 The Diffraction Grating Chinua McDonald Objective: To measure the wavelength of light with a diffraction grating. Theory: The two types of diffraction gratings are the transmission and reflection gratings. They are made by ruling on a piece of glass or metal a number of evenly spaced lines with a fine diamond point. Diffraction phenomena can be analyzed in terms of Huygens’ principle‚ according to which every point on the wave front of a wave should be considered as a source
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photographs of a number of vertebrates copy of student worksheet Method: 1 Examine each of the vertebrate specimens in turn. Using Figure 1 as a guide‚ locate and identify the bones making up the pentadactyl limb structure. 2 Make a labelled sketch in your workbook of the forelimbs of two specimens. 3 Describe the differences you see in the two sketches. 4 Complete the missing labels from the lizard skeleton 5 Using coloured pencils‚ shade each type of bone for each animal. Use one colour per bone type. Include an appropriate key
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Lab Report Experiment Aim: To determine the acceleration of an object down an incline plane using various methods. Research Question: Is there a relationship between the angle θ of the incline and the acceleration down the plane? Equipment: * Ticker Timer (AC 50Hz ) * Incline (wood) * Meter ruler * Dynamic Trolley ( Mass: 380.55 ± 0.01g ) * Carbonated paper * Power Source (2W) * Data Logger * Motion Sensor * Tennis Ball Method
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The Stanley Milgram experiment takes normal everyday people and gives them orders to do horrible things. The test is to see if someone would do an awful act just on the basis of someone telling them to. This experiment speaks to the ’nature of responsibility’ and to see if the subject will stop the experiment due to its dangerous nature. The subject is tricked into thinking they are the teacher‚ and the other person in the room‚ an actor‚ is the learner. The teacher will ask the learner a series
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Introduction The purpose of this experiment is to validate the effectiveness of different types of disinfectants and antibiotics on microbes. It was hypothesized that antibiotic products work better than regular products such as soap‚ hand sanitizer etc. According to the handout that was provided in this laboratory work‚ it was believed that many of the environs occupied by individuals are exposed to different types of microbes and methods of eradicating such microbes has been studied over the years
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are as follows: 1.5 mM substrate‚ enzyme‚ Stop solution‚ buffer‚ DPTPs‚ 15 ml conical tubes‚ cuvettes‚ marker‚ beaker‚ distilled water‚ spectrophotometer‚ stop watch. First four 15 ml conical tubes were labeled: “Stop solution“‚ “1.5 mM Substrate”‚ “Enzyme”‚ and “Buffer”. Then‚ seven cuvettes were located and five of them were labeled “E1-E5” and the other two were labeled “Start” and “End”. After 500 ul of “Stop solution“ was pipetted using a clean DPTP into the seven cuvettes. Next‚ two 15ml conical
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Experiment 1: Bromination of Acetanilide1 Precautions: Ethanol is flammable Sodium hypochlorite is an oxidizing agent and releases toxic fumes (handle in fume hood) Acetic acid is corrosive‚ harmful if inhaled‚ flammable and can cause burns (handle in fume hood) Gloves are recommended to avoid chemical contact with skin Reaction Scheme: Conversion of acetanilide to p-bromoacetanilide Procedure: To a 125 mL Erlenmeyer flask containing a mixture of 95% ethanol (6 mL) and acetic acid (5 mL)‚ dissolve
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