BLD 313 Study Comprehensive Resource To Help You Ace
2026-2027 Exams Includes Frequently Tested Questions
With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. How will you prepare 120 g of 35.0 %w/w sodium hydroxide (NaOH)
aqueous solution - Correct Answer: Mix 42 g of NaOH and 78 g of
deionized water and stir until all dissolve
2. You need to make 70.0 %v/v isopropanol aqueous solution. How many mL
of isopropanol (70.0 %v/v) aqueous solution can you make maximum if you
only have 250 mL of pure isopropanol - Correct Answer: 357 mL
3. How will you prepare 4.0 L of 0.85 %w/v sodium chloride (NaCl) aqueous
solution. - Correct Answer: Dissolve 34 g of NaCl in deionized water and
make the final volume to be 4.0 L
4. You have to make 1.00 L of 500 mM MgCl2 with deionized water and
magnesium chloride anhydrous (MgCl2). How do you prepare this solution -
Correct Answer: Dissolved 47.6 g of MgCl2 into deionized water, and
make the final volume 1.00 L
5. What is the osmolarity of 350 mM MgCl2 aqueous solution? - Correct
Answer: 1.05 Osm/L
,6. What are the normality of these two base aqueous solutions and two acid
aqueous solutions listed on the right? Match the correct normality.
3.3 M HCl
2.8 M NaOH
2.5M H3PO4
1.5 M Ba(OH)2
2.8 N
3.0 N
3.3 N
7.5 N - Correct Answer: (3) 3.3 M HCl
a. 2.8 M NaOH
(4) 2.5M H3PO4
b. 1.5 M Ba(OH)2
7. You diluted your patient's serum 100 μL with 400 μL isotonic saline solution.
What is the final dilution of this? Choose all the correct answer. -
Correct Answer: 1:5 dilution
1/5 dilution
8. You need to find out the titer of analyte-X for patient-Y. You performed a
serial dilution of patient-Y serum and run a reaction with each dilution level
as in the table. You recorded the reaction result as (+) if there was a
reaction: as (-) if there was no reaction with the dilution level. What is the
titer? ( Tube 5 is positive and Tube 6 is negative) - Correct Answer: 32
9. Calculate the pH of each strong acid and strong base aqueous solutions.
Assume anion(s) and cation(s) will dissociate 100 %. The temperature of
, these solution is 25 ºC. The list of acid/base solution is on the right. Match
the pH from the list on the left.
0.50 M NaOH
0.20 M HCl
20 mM HCl
pH 0.70
pH 13.7
pH 0.30
pH 1.70
pH -1.30 - Correct Answer: (2) 0.50 M NaOH
a. 0.20 M HCl
b. 20 mM HCl
10.2-acetoxybenzoic acid (aspirin) is a weak acid (pKa = 3.48). What would be
the pH of 10 mM aspirin aqueous solution? - Correct Answer: pH 2.74
11.Sodium acetate CH3COONa (0.001 moles) and acetic acid CH3COOH (0.030
moles) were used to make 1 L aqueous buffer solution. What is the final pH
of this buffer solution?
Acetic acid pKa = 4.76 - Correct Answer: pH 3.52
12.Which of the following statements best describes a quality assurance
program of clinical laboratories? - Correct Answer: Check every aspect
of the entire testing process including pre-analytical, analytical and post-
analytical phases
, 13.Which of the following is an example of preanalytical error? - Correct
Answer: A specimen that is mislabeled
14.Which of the following is NOT a part of the quality assurance program of a
clinical laboratory? - Correct Answer: Refer patients to specialists based
on appropriate test results
15.Which of the following best describes quality control in clinical
laboratories? - Correct Answer: It ensures a particular test method is
working properly.
16.A patient had a new screening test for HIV. The test indicated that the
patient is not infected. But actually he is infected. Which of the following
properly describes the test result? - Correct Answer: False negative
attributable risk
odd ratio
relative risk
Cohort study
Case-control study
17.Choose two groups (with or without incident) A researcher goes back their
history to check if they expose to the factor or not.
Choose a population and separate them into two groups (with or without
exposure) A researcher follow their life from now to check if they will have
an incident or not.
a likelihood to have the incident in an exposed group compared to non-
exposed group
2026-2027 Exams Includes Frequently Tested Questions
With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. How will you prepare 120 g of 35.0 %w/w sodium hydroxide (NaOH)
aqueous solution - Correct Answer: Mix 42 g of NaOH and 78 g of
deionized water and stir until all dissolve
2. You need to make 70.0 %v/v isopropanol aqueous solution. How many mL
of isopropanol (70.0 %v/v) aqueous solution can you make maximum if you
only have 250 mL of pure isopropanol - Correct Answer: 357 mL
3. How will you prepare 4.0 L of 0.85 %w/v sodium chloride (NaCl) aqueous
solution. - Correct Answer: Dissolve 34 g of NaCl in deionized water and
make the final volume to be 4.0 L
4. You have to make 1.00 L of 500 mM MgCl2 with deionized water and
magnesium chloride anhydrous (MgCl2). How do you prepare this solution -
Correct Answer: Dissolved 47.6 g of MgCl2 into deionized water, and
make the final volume 1.00 L
5. What is the osmolarity of 350 mM MgCl2 aqueous solution? - Correct
Answer: 1.05 Osm/L
,6. What are the normality of these two base aqueous solutions and two acid
aqueous solutions listed on the right? Match the correct normality.
3.3 M HCl
2.8 M NaOH
2.5M H3PO4
1.5 M Ba(OH)2
2.8 N
3.0 N
3.3 N
7.5 N - Correct Answer: (3) 3.3 M HCl
a. 2.8 M NaOH
(4) 2.5M H3PO4
b. 1.5 M Ba(OH)2
7. You diluted your patient's serum 100 μL with 400 μL isotonic saline solution.
What is the final dilution of this? Choose all the correct answer. -
Correct Answer: 1:5 dilution
1/5 dilution
8. You need to find out the titer of analyte-X for patient-Y. You performed a
serial dilution of patient-Y serum and run a reaction with each dilution level
as in the table. You recorded the reaction result as (+) if there was a
reaction: as (-) if there was no reaction with the dilution level. What is the
titer? ( Tube 5 is positive and Tube 6 is negative) - Correct Answer: 32
9. Calculate the pH of each strong acid and strong base aqueous solutions.
Assume anion(s) and cation(s) will dissociate 100 %. The temperature of
, these solution is 25 ºC. The list of acid/base solution is on the right. Match
the pH from the list on the left.
0.50 M NaOH
0.20 M HCl
20 mM HCl
pH 0.70
pH 13.7
pH 0.30
pH 1.70
pH -1.30 - Correct Answer: (2) 0.50 M NaOH
a. 0.20 M HCl
b. 20 mM HCl
10.2-acetoxybenzoic acid (aspirin) is a weak acid (pKa = 3.48). What would be
the pH of 10 mM aspirin aqueous solution? - Correct Answer: pH 2.74
11.Sodium acetate CH3COONa (0.001 moles) and acetic acid CH3COOH (0.030
moles) were used to make 1 L aqueous buffer solution. What is the final pH
of this buffer solution?
Acetic acid pKa = 4.76 - Correct Answer: pH 3.52
12.Which of the following statements best describes a quality assurance
program of clinical laboratories? - Correct Answer: Check every aspect
of the entire testing process including pre-analytical, analytical and post-
analytical phases
, 13.Which of the following is an example of preanalytical error? - Correct
Answer: A specimen that is mislabeled
14.Which of the following is NOT a part of the quality assurance program of a
clinical laboratory? - Correct Answer: Refer patients to specialists based
on appropriate test results
15.Which of the following best describes quality control in clinical
laboratories? - Correct Answer: It ensures a particular test method is
working properly.
16.A patient had a new screening test for HIV. The test indicated that the
patient is not infected. But actually he is infected. Which of the following
properly describes the test result? - Correct Answer: False negative
attributable risk
odd ratio
relative risk
Cohort study
Case-control study
17.Choose two groups (with or without incident) A researcher goes back their
history to check if they expose to the factor or not.
Choose a population and separate them into two groups (with or without
exposure) A researcher follow their life from now to check if they will have
an incident or not.
a likelihood to have the incident in an exposed group compared to non-
exposed group
