How do you sterilize a bent glass rod? The glass rod is dipped in alcohol The glass rod is dipped in alcohol and then the alcohol is burned off O The glass rod can be heated directly in the bunsen burner O Glass rods do not need to be sterilized
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- QUESTION 27 Which of the following identified atoms (dashed arrow) is classified as an electrophile ? OH H. A В C D O A. A ОВ. В O C.C O D.D O E. None of these is an electrophile Click Save and Submit to save and submit. Click Save All Answers to save all answers. SaQuestion 2 MSA is a selective medium and contains a higher salt concentration, a pH indicator and Mannitol sugar. Which of the following makes it selective me Staphylococci? OA Mannitol O B. PH indicator OC Agar O D, SaltQuestion 2. After sterility test of an injectable it was observed that an injection is failed the test what will you do then depending on the product nature (heat sensitive/ heat resistant) (Not more than one sentence)? Mention the purpose of product inhibition test and how it is performed (Not more than one sentence) ? How will you check the validity of a medium (Not more than one sentence) ?
- Question 23 Would use of alcohol based hand santizers destroy Clostridium difficile endospores? Yes No O Maybe Ouestion 24Question 66 Which below is/ are acellular? (best answer) O prions and viruses Viruses O prions O Staphylococcus_QUESTION 15 Which of the results shown in the figure (Test A, B, or C) used Biuret Reagent? TEST A TEST B TEST C Test A none of these Test B Test C QUESTION 16
- Question 7 A series of mutant strains (a through f) of a particular mold are not able to grow on minimal media unless they are supplemented by one or more of the compounds Q through V as shown below. Strain a b с d e f Q 0 0 + 0 0 + R 0 + + 0 + + Supplements S 0 o 0 0 0 0 T + + + + + + U V 0 + + 0 0 + 0 + + + + + + = growth 0 = no growth Draw a plausible metabolic pathway supported by the data provided in the Table above, showing the position of each metabolic intermediate in the pathway, which step is blocked by each mutant and explain your answer. (8 marks)Question 3. Your professor asks you to make a staining solution to stain and observe specimens under the microscope. You are told to prepare 100 mL of staining solution containing 40% methanol, 1X hematoxylin dye and 0.01 M calcium chloride (CaC12). In the histology lab, you find a stock of 100% pure methanol (liquid), a 10x hematoxylin dye stock solution (liquid), plenty of water and a stock solution of 5M CaC12. There are also all kinds of pipets, cylinders and beakers to measure volumes. a) Describe how you make the staining solution? b) On your following trip to the histology lab, you realize that all the pipets to accurately measure volumes smaller than 1 ml are broken. What alternative method do you need to use to avoid pipetting small volumes (just explain in a couple of sentences, no calculation needed)?Question 13 All of the following microorganisms contains the enzyme catalase except? aerobes O facultative anaerobes microaerobes O obligate anaerobes
- QUESTION 4 Match the following regarding the Gram stain. A. last step in the procedure primary stain В. crystal violet counterstain C. nigrosin mordant D. 95% ethanol docolorizing agent E. methylene blue F. jodineQUESTION 7 CocciTetradDiplo Which of the following statements describes the Gram status, shape and arrangement for the bacteria circled on the right in the picture above? Gram negative, cocci, tetrad Gram negative, cocci, diplococci Gram positive, diplococci, cocci Gram positive, cocci, tetradQUESTION 9 Which color pigment was most attracted to the stationary phase? Solvent After Ten Minutes O Yellow O All are equally attracted to the the immobile phase. Blue O Red