MLPAO Exam Set( 2024/2025) - Questions and Answers, Complete Solutions Which of the following is the counterstain for the gram stain method? - crystal
... [Show More] violet - safranin - acetone-alcohol - iodine - gentian-violet Most fixatives act by: - precipitating calcium ions in cells - precipitating cell wall - precipitating carbohydrates in cells - precipitating enzymes in the cells - none of the above A Westergren tube is used for which test procedure? - prothrombin time - hematocrit - platelet count - erythrocyte sedimentation rate - reticulocyte count Which of the following is the best examples of homeostasis? - sexual reproduction - growth - regulation of body temperature - growth of hair under arms - storage of fat as adipose A Gaspack/candle jar can be used to produce: - an aerobic environment - an anaerobic environment - more vacuum - a vacuum - two of the above Exchange of Oxygen and nutrients take place via: - lymphatic vessels - arteries - arterioles - capillaries - venules MLA is going to prepare 70.5 mL of a solution with 90% concentration. Best glassware used to make this: - volumetric flask - erlenmeyer cylinder - beaker - graduated cylinder - none of the above The range of pH is: - 1-14 - 1-7 - 1-12 - 0-12 - 0-14 A pH of 2 is _________ a pH of 5 - 1000 times less acidic than - 100 time more acidic than - 2 times less acidic than - 20 time less acidic than - 1000 times more acidic than A blood glucose is preferred to be done on: - a whole blood using sodium citrate - clotted blood - whole blood using oxalate and sodium fluoride as an anticoagulant - a finger prick specimen - urine What is the name given to a substance that kills disease causing microorganisms but not spores and is used on inanimate object? - disinfectant - antiseptic - antibiotic - fungicide Tissues are generally embedded in paraffin wax so that they may be: - decalcified - cut into sections - dehydrated - fixed - stained The pipette with a bulged middle section is a: - mohr pipette - serological pipette - micro pipette - volumetric pipette - broken pipette A patient asks you to tell him his test results.. You should, - ask him to check with his physician - tell him the results are not ready - tell him his results - refuse to discuss the subject - only tell him if results are normal A plasma protein involved in clotting is: - immunoglobulin - gamma globulin - albumin - fibrinogen - unable to determine with information given What tube would be drawn if a physician requested a heterophile antibody screen? - green -grey - lavender - SST - light blue Which statement is false regarding setting up an ESR test? - it must be read in 1 hour - it can be located near a centrifuge - it should be filled to exactly the zero mark - it should be performed on fresh blood - it must be set up vertically What is the purpose of a white blood cell differential? - to determine proportion of red cells to white cells in whole blood - to determine white cell count in whole blood - to determine proportion of different white cells in whole blood - to diagnose anemia A dark yellow or amber colored serum is called: - created - lipemic - icteric - jaundiced - hemolyzed 100 mL of 20% hydrochloric acid will make what volume of 4% hydrochloric acid? - 500 ml - 50 ml - 1000 mL - 100 mL - 80 mL Anticoagulant therapy is monitored by performing a(n): - ESR (Erythrocyte sedimentation rate) - CBC (Complete blood count) - PT (prothrombin time) - FBS (fasting blood sugar) - Hgb (Hemoglobin) The layer above a sediment in a solution is the: - supernatant - solution - suspension - buffy coat A buffer is: - a pair of weak base with its conjugate(weaker) acid - a pair of weak acid with its conjugate(weaker) base - resist changes in pH when add acid or base - an aqueous solution - all of the above Beta hemolysis causes: - a green discoloration around colonies on blood agar(alpha) - a completely clear zone around colonies on blood agar - the death of bacteria - normal autolysis of blood cells - none of the above (gamma = no changes in agar) Stool concentration method concentrates which of the following: - parasites - ova - white blood cell - red blood cells - all of the above - a and be are correct To properly autoclave a small load of waster or equipment, the autoclave should be set at: - 121°C for 50 minutes at 15 p.s.i. - 130°C for 30 minutes at 30 p.s.i. - 121°C for 15 minutes at 15 p.s.i. - 121°C for 30 minutes at 15 p.s.i - 121°C for 20 minutes at 20 p.s.i. Which of the following acids is not to be used for decalcifiation? - formic acid - nitric acid - hydrobromic acid - all of the above can be used - none of the above can be used Tissues are fixed to: - prevent changes in cellular morphology - facilitate staining - allow tissues to be examined in a life-like condition - all of the above A solution that has a solute concentration equal to that in a cell is described as: - hypertonic - hypotonic - hydrostatic - osmotic - isotonic Which of the following in urinalysis may indicate a urinary tract infection? - presence of WBC - presence of pH - presence of Nitrite - both a and c - all of the above WHMIS stands for: - Workplace Harmful Materials and Industrial Safety - Workplace Hazardous Materials Information System - Workplace Hazardous Material and Information System - Workplace Hazardous Management of Industrial Systems Glycosolated Hemoglobin (HGB A1C): - is the type of hemoglobin causing sickle cell anemia - is expressed in mol/L - is taken in a green top tube - can indicate glucose levels over the last 120 days - none of the above Media refers to: - away from the center of the body - toward the center of the body - toward the head - toward the feet - none of the above In blood culture collection, these procedures are followed except: - the specimen is kept at room temperature, not refrigerated - an arterial sample is drawn - an anaerobic and aerobic bottle are drawn if possible - the blood culture is always drawn first - tincture of iodine or proviodine are used an antiseptic What is the correct sequence for a gram stain? - safranin, iodine, acetone-alcohol, crystal-violet - crystal-violet, acetone-alcohol, iodine, safranin - crystal-violet, iodine, acetone-alcohol, safranin - safranin, acetone-alcohol, iodine, crystal-violet If the name of a bacterium ends in coccus, then its shape is: - rod-shaped - spiral - spherical - short and slender - short rod, slightly rounded Rouleaux is: - a thrombus formation - clotting of blood - lysis of red blood cells - stacked coin appearance of red blood cells in a smear Which of the following is the active ingredient in Drabkin's reagent? - cyanide - ferrous oxide - cresyl blue - cyanmethemoglobin - none of the above Which of the following will interfering in routine analysis? - Riboflavin (B2) - ascorbic acid (vitamin C) - porphyrins - vitamin b12 - all of the above The most abundant immunoglobulin in the body is: - IgA - IgD - IgE - IgG - IgM
The anticoagulant used for a CBC is: - EDTA - oxalate - citrate - heparin Which of the following would normally be found in plasma? - cholesterol - calcium - glucose - fibrinogen - all of the above If a urine specimen is allowed to sit at room temperature for more than one hour, what changes may take place? - it will become cloudy - any glucose levels will fall - any red or white blood cells will lyse - all of the above Which of the following tubes would be used for a cholesterol level determination? - heparin - EDTA - SST - citrate - oxalate The term for the presence of bacteria in the blood is: - meningitis - septicemia - anemia - bacteremia A candle jar is used to produce: - anaerobic atmosphere - aerobic atmosphere - increased nitrogen atmosphere - vacuum
In urinalysis, a confirmatory test for urine protein would be: - acetest (ketones) - clinitest (glucose-sugar) - hematest (fecal occult blood) - SSA test - Ictotest (bilirubin) - unneccessary NaCl is added to distilled water in a container. What term would you use to identify the distilled water? - solvent - solute - reagent - solution - mixture When performing venipuncture, the tourniquet should be released: - before needle insertion - after blood begins to enter the tube - one minute after blood begins to enter the tube - just before needle is withdrawn - after the needle is withdrawn - after needle insertion before blood begins to enter the tube The shape of a normal erythrocyte is called: - a biconcave disk - spherical - columnar - muffin shaped - none of the above If blood is collected in a green top tube, when centrifuged it will separate into: - serum and clot - plasma and clot - serum, buffy coat, and clot - plasma, buffy coat, and red blood cells - plasma, buffy coat and clot The purpose of heat fixing a bacterial smear is to: - cause the cells to absorb stain more readily - prevent cells from washing off the slide - provide a warm temperature for cells to grow - make cells visible under the microscope [Show Less]