BACE Exam Questions and All Correct Answers A +

BACE Exam Questions and All Correct Answers A + 4.651 x 10^4 written in expanded form is - ANSWER 46,510 What is 5.78 x 3.13, rounded to the correct number of significant digits? - ANSWER 18.1 What is 4.202 x 0.806, rounded to the correct number of significant digits? - ANSWER 3.39 How many grams is 2.6 kg? - ANSWER 2600 How many milliliters is 0.725L? Group of answer choices - ANSWER 725 Your supervisor provides you with a 1.0 mg/mL solution of Bovine Serum Albumin (BSA), and asks you to make a 5-step 2-fold serial dilution. What would be the dilution factor at step 3? - ANSWER 1:8 You are given a 5.0 mg/mL protein standard solution, and asked to prepare a 5-step, 2- fold serial dilution to create a standard curve. What is the final concentration of protein standard in mg/mL? Record the correct amount to three decimal places. - ANSWER 0.156 You are given a 5.0 mg/mL protein standard solution, and asked to prepare a 5-step, 2- fold serial dilution to create a standard curve. After the third step of the dilution, what is the concentration of the protein standard, in mg/mL? Record the correct amount to two decimal places. - ANSWER 0.63 Your supervisor provides you with a 1.0 mg/mL solution of Bovine Gamma Globulin (BGG). What is the dilution factor if you add 150 µL of 1.0 mg/mL BGG to 150 µL of diluent? - ANSWER 1:2 A technician is asked to prepare a dilution of a common laboratory disinfectant. The label indicates that a 1:29 dilution in water is required prior to use. Using the simple dilution method, calculate the volume in mL of disinfectant required to make 1.0 L. Record the answer to one decimal place below - ANSWER 34.5 An SOP for preparing a bleach solution instructs to dilute the bleach 1:15 in water. Using the simple dilution method, calculate the volume in mL of bleach required to make 3.5 L. Record the correct amount to one decimal place. - ANSWER 233.3 mL You are given a stock protein solution with a concentration of 24 mg/mL. Determine the protein concentration of a solution made by mixing 5 μl of the stock with 45 μl of a buffer. Record the amount to one decimal place. - ANSWER 2.4 Calculate the volume in mL of 50X TE Buffer required to make 1.5 L of 1X TE Buffer. - ANSWER 30 mL Calculate the volume in mL of 25X TAE Buffer required to make 5.0 L of 1X TAE Buffer. Record the correct amount. - ANSWER 200 mL Calculate the volume in mL of a 10.5 mg/mL tetracycline stock solution required to make 525 mL LB with a final concentration of tetracycline at 2.75 mg/mL. Record the answer to one decimal place. - ANSWER 137.5 Which of the following is the correct method to make 1 L of 10% sodium chloride? - ANSWER Dissolve the appropriate amount of sodium chloride in a small volume of dH2O, then adjust the volume to 1 L Calculate the mass in g of agarose required to make 200 mL of a 1.2% agarose gel. Record the answer to one decimal place. - ANSWER 2.4 Calculate the mass in mg of kanamycin required to make 25 mL of a 12 mg/mL solution of kanamycin. - ANSWER 300 Calculate the mass in g of sucrose required to make 125 mL of a 15.5% (w/v) sucrose solution. Record the correct amount to one decimal place. - ANSWER 19.4 Calculate the mass in g of MgCl2 required to make 75 mL of a 20% (w/v) MgCl2 solution. Record the correct amount. - ANSWER 15 Calculate the volume in mL of a 10.0 M solution of HCl stock solution required to make 250 mL of 1.0 M HCl? Record the correct amount. - ANSWER 25 Calculate the volume in mL of a 1.5 M solution of NaOH stock solution required to make 275 mL of 50.0 mM NaOH? Record the answer to one decimal place. - ANSWER 9.2 Calculate the molarity of a solution containing 0.42 moles of NaCl in 2.5 L of water? Record the answer to two decimal places. - ANSWER .17 To dilute a bacterial culture, 10 uL of culture is mixed with fresh culture medium to a final volume of 0.5 mL. The culture was diluted by a factor of: - ANSWER 50 bleach - ANSWER Basic lemon juice - ANSWER Acidic Baking soda - ANSWER Basic Oven cleaner - ANSWER Basic vinegar - ANSWER Acidic NaCl bond type - ANSWER ionic bond H20 bond type - ANSWER Polar covalent CH4 bond type - ANSWER Nonpolar covalent What is used to calculate the amount of compound required to make a solution - ANSWER Molecular weight carbohydrates function - ANSWER Cellulose. Energy storage, receptors, structure of cell wall Lipids function - ANSWER Cholesterol. Membrane structure, energy storage Nucleic acids function - ANSWER RNA. information storage and transfer Proteins function - ANSWER Enzymes. structure, receptors, transport is the solvent the dissolved matter in a solution - ANSWER False Carbon dioxide as a by-product benefits the brewing and baking industry in a process called fermentation. When microorganisms (usually yeast) undergo fermentation, they obtain their energy by: - ANSWER Anaerobic respiration