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STEM Workplace Practices Q6
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- 1. Name the bio instrument that performs the following function: b. Oxygen Saturation measurementb) Low-Density Lipoprotein (LDL) is the major carrier of cholesterol in the blood. Whereas the levels of LDL and modified LDL forms in the plasma are important predictive markers to gauge the risk of cardiovascular events. There is a need to develop reliable rapid assays for quantifying LDL and its modified forms, such as, the biosensors. i. List two major parts of a biosensor. ii. List three examples of biological substance which being recognized as sensing elements for a biosensor. iii. Suggest two drawbacks of beta quantification on LDL measurement.Briefly explain that what is the important to use immobilization techniques in biosensor?..(explain under5 points)
- Directions: Use the lab manual to answer the following questions in COMPLETE SENTENCES AND IN YOUR OWN WORDS. Use your own handwriting, do NOT type! 1. Read through each procedure below and BRIEFLY describe the procedure in one-two sentences. Be sure to include the REAGENT needed and special steps (for example, heating or special lab equipment). a. Test for Reducing Sugars: Reagent: Describe what a positive and negative result should look like: ● ● Procedure: b. Test for Starches: • Reagent: Describe what a positive and negative result should look like: Procedure: Lab Exercise 2 | Basic Chemistry: Chemical Composition of Cells 35Provide: a. The names of five (5) personal care or cosmetic brands that have nanotech ingredients. b. The nanotech ingredient being used if available. If not, just mention the active ingredient which probably is a nanotech even if it is not mentioned in the article or label. c. The manufacturing company.5. a) Thin layer chromatography (TLC) and high performance liquid chromatography (HPLC) can be used asexamples to explain difference between adsorption and partition. For each of these chromatographic techniques,identify:+ the stationary and mobile phase+ how the mobile phase movesb) How is the Rf value for a spot on a TLC plate calculated? What can the Rf value be used for? In order toachieve the best separation of several components of different polarity in a mixture spotted on a TLC plate,what guideline should one follow regarding the choice of a developing solvent? (i.e. polar, non-polar, etc.)
- 78. Which situation(s) might result in a higher than expected plasma drug concentration? a. Enzyme induction b. Enzyme saturation c. Competitive inhibitors of metabolizing enzymes d. A and B e. B and C6. For each of the following statements, please circle whether the statement is valid SOMETIMES, ALWAYS, NEVER. Write one or two sentences justifying your choice. a) Biomaterials corrode when placed in the body SOMETIMES, ALWAYS, NEVER. b) There is a biological response when a foreign material is placed in the body SOMETIMES, ALWAYS, NEVER.26) Factors that affect tissue preservation include a. Speed of fixation Choice of fixative b. Sample size Volume of fixative c. d. e. All of the above
- J 5 Considering the following information, obtain de capacity of the bioreactorManipulated? Measured? B. EFFECT OF TEMPERATURE ON THE RATE OF ENZYME REACTION a. Procedure 1. Choose a concentration of amylase that had an endpoint time of 60 to 90 seconds in Part A. This will probably be either 1.0 or 2.0 mg/ml. Only one amylase concentration will be used for this exercise. Pipette exactly 1 ml of this amylase concentration into each of 6 clean test tubes. 2. Obtain 6 clean test tubes and add 2 ml of starch solution and 2 ml of pH 7.0 buffer to each. You now have 6 identical test tubes with amylase and 6 identical test tubes with starch and buffer. 3. Place a pair of test tubes (an amylase test tube and a starch/buffer test tube) in each of the following temperatures: 100°C, 60°C, 45°C, 37°C, ice and room temperature. Allow 10 minutes for samples to reach the correct temperature. 4. Follow the timing procedure in part A and determine the endpoint times for each pair. To conserve time, if endpoint has not been reached in 500 seconds, STOP, and record the end time as…A The characteristic(s) of discontinuous gel electrophoresis include A. All of the answers B. the stacking gel has a lower acrylamide concentration, so its pores are larger. C. the presence of two gel layers - a lower or resolving gel and an upper or stacking gel D. the buffers used to prepare the two gel layers are of different ionic strengths and each has different pH 28 Analytical ultracentrifugation is most often employed in A. in ligand-binding studies. B. the determination of the purity of macromolecules C. the detection of conformational changes D. All of the answers