FREE LABORATORY SCIENCE AND STUDY GAMES ABOUT

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FREE LABORATORY SCIENCE AND STUDY GAMES ABOUT

CHEMISTRY EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -367 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: The most sensitive enzymatic indicator for liver damage from ethanol intake

is:

Answer:

gamma-glutamyl transferase (GGT)

Question 2: What is the formula for calculating a percent (w/v) solution?

Answer:

grams of solute/volume of solvent x 100 Question 3: The following results were obtained from a set of automated white blood cell counts performed on 40 samples: Standard deviation 153.2/uL, Mean value 12,450/uL. Calculate the

coefficient of variation:

Answer:

1.2% Question 4: The results on page 186 are from a 21-year-old patient with a back injury who

appears otherwise healthy. The best interpretation of these results is that:

Answer:

all values are consistent with a normal healthy individual

Question 5: The parent substance in the biosynthesis of androgens and estrogens is:

Answer:

cholesterol Question 6: The biuret reaction for the analysis of serum protein depends on the number of:

Answer:

peptide bonds Question 7: In a centrifugal analyzer, centrifugal force is used to:

Answer:

transfer liquids from the inner disc to the outer cuvette

Question 8: How many grams of H2SO4 (MW=98) are in 750 mL of 3 N H2SO4?

Answer:

110 Question 9: The function of the major lipid components of the very low density lipoproteins

(VLDL) is to transport:

Answer:

endogenous riglycerides Question 10: At blood pH 7.40 what is the ratio between bicarbonate and carbonic acid?

Answer:

20:1

Question 11: How many grams of sulfosalicylic acid (MW = 254) are required to prepare 1 L of a 3% (w/v) solution?

Answer:

30 Question 12: The ability of a procedure to measure only the component(s) it claims to measure

is called:

Answer:

specificity

Question 13: During an evaluation of renal function, a patient had plasma cortisol determiniations in the morning after awakening and in the evening. Laboratory results indicated that the morning value was higher than the evening concentration. This is indicative of

Answer:

a normal finding Question 14: Respiratory acidosis is described as a(n):

Answer:

increase in CO2 content and PCO2 with a decreased pH Question 15: Pregnant women with symptoms os thirst, frequent urination, or unexplained weight loss should have what test preformed?

Answer:

glucose tolerance test Question 16: The most frequent value in a collection of data is statistically known as the:

Answer:

mode

Question 17: Pellagra is associated with deficiency of what vitamin?

Answer:

niacin Question 18: Increased total serum lactic dehydrogenase (LD) activity, confined to fractions 4

and 5, is most likely to be associated with:

Answer:

acute viral hepatitis Question 19: Serum "anion gap" is increased in patients with:

Answer:

lactic acidosis Question 20: If the LDL-cholesterol is to be calculated by the Friedenwald formula, what are the two measurements that need to be carried out by the same chemical procedure?

Answer:

total cholesterol and HDL-cholesterol

Question 21: Fasting serum phosphate concentration is controlled primarily by the:

Answer:

parathyroid glands Question 22: In the liver, bilirubin is converted to:

Answer:

bilirubin diglucuronide Question 23: The Porter-Silber method (phemylhydrazine in alcohol and sulfuric acid) involves which part of the steroid molecule?

Answer:

dihydroxyacetone side chain Question 24: 4 mL of water is added to 1 mL of serum. This represents what serum dilition?

Answer:

1:5

Question 25: Refer to the illustration on page 163. The above sybol posted in an area would indicate what hazard?

Answer:

flammable Question 26: The substance that is measured to estimate the serum concentration of

triglycerides by MOST methods is:

Answer:

glycerol Question 27: A benifit of microassays includes:

Answer:

reduced reagent requirements Question 28: Which of the following applies to cryoscopic osmometry? See page 124 for choices.

Answer:

• The temperature at euilibriun is a function of thenumber of particles in solution.