MLT Chemistry Test

102 Questions | By Williamwan | Last updated: Jan 9, 2013 | Total Attempts: 6630

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Questions and Answers

1.

The biuret reaction for the analysis of serum protein depends on the number of?
- A.
  
  Free amino acids
- B.
  
  Free carboxyl groups
- C.
  
  Peptide bonds
- D.
  
  Tyrosine residues
2.

Calcium concentration in the serum is regulated by?
- A.
  
  Insulin
- B.
  
  Parathyroid hormone
- C.
  
  Thyroxin
- D.
  
  Vitamin C
3.

In the liver, bilirubin is converted to:
- A.
  
  Urobilinogen
- B.
  
  Urobilin
- C.
  
  Bilirubin-albumin complex
- D.
  
  Bilirubin diglucuronide
4.

The osmolality of a urine or serum specimen is measured by a change in the?
- A.
  
  Freezing point
- B.
  
  Sediment point
- C.
  
  Midpoint
- D.
  
  Osmotic pressure
5.

Which of the following steroids is an adrenal cortical hormone?
- A.
  
  Angiotensinogen
- B.
  
  Corticosterone
- C.
  
  Progesterone
- D.
  
  Pregnanetriol
6.

Which two conditions can “physiologically” elevate serum alkaline phosphatase?
- A.
  
  Rickets, hyperparathyroidism
- B.
  
  Obstructive jaundice
- C.
  
  Growth, third trimester of pregnancy
- D.
  
  Viral hepatitis, infectious mononucleosis
7.

During an elevation of adrenal function, a patient had plasma cortisol determination is 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?
- A.
  
  A normal finding
- B.
  
  Cushing’s syndrome
- C.
  
  Addison’s disease
- D.
  
  Hypopituitarism
8.

In electrophoretic analysis, buffers?
- A.
  
  Stabilize electrolytes
- B.
  
  Maintain basic PH
- C.
  
  Act as a carrier for ions
- D.
  
  Produce an effect on protein configuration
9.

The T3 resin uptake test is a measure of?
- A.
  
  Circulating T3
- B.
  
  Bound T3
- C.
  
  Binding capacity of thyroxine-binding globulin
- D.
  
  Total thyroxine-binding globulin
10.

Blood PCO2 may be measured by?

Discuss
- A.
  
  Direct colorimetric measurement of dissolved CO2
- B.
  
  Calculations of blood PH and total CO2 concentration
- C.
  
  Measurement of CO2-saturated hemoglobin
- D.
  
  Measurement of CO2 consumed at the cathode
11.

Which of the following serum constituents is unstable if a blood specimen is left standing at room temperature for 8 hours before processing?
- A.
  
  Cholesterol
- B.
  
  Triglyceride
- C.
  
  Creatinine
- D.
  
  Glucose
12.

Total iron-binding capacity measures the serum iron transporting capacity of?
- A.
  
  Hemoglobin
- B.
  
  Ceruloplasmin
- C.
  
  Transferrin
- D.
  
  Ferritin
13.

In a spectrophotometer, light of a specific wavelength can be isolated from white light with a(n)?
- A.
  
  Double beam
- B.
  
  Diffraction grating
- C.
  
  Aperture
- D.
  
  Slit
14.

Absorbance (A) of a solution may be converted to percent transmittance (%T) using the formula?
- A.
  
  1 + Log %T
- B.
  
  2 + Log %T
- C.
  
  1 - Log %T
- D.
  
  2 - Log %T
15.

A condition in which erythrocyte protoporphyrin is increased is?
- A.
  
  Acute intermittent porphyria
- B.
  
  Iron Deficiency anemia
- C.
  
  Porphyria cutanea tarda
- D.
  
  Acute porphyric attack
16.

The formula for calculating serum osmolaliity that incorporates a correction for the water content of plasma is?
- A.
  
  2 Na x (Glucose/20) x (BUN/3)
- B.
  
  Na + (2 x Glucose/20) x (BUN/3)
- C.
  
  2 Na + Glucose/20 + (BUN/3)
- D.
  
  2 Na + Glucose/3 + (BUN/20)
17.

The first step to be taken when attempting to repair a piece of electronic equipment is?
- A.
  
  Check all the electronic connections
- B.
  
  Reset all the printed circuit boards
- C.
  
  Turn the instrument off
- D.
  
  Replace all the fuses
18.

Most of the carbon dioxide present in the blood is in the form of?
- A.
  
  Dissolve CO2
- B.
  
  Carbonate
- C.
  
  Bicarbonate ion
- D.
  
  Carbonic acid
19.

The statistical term for the average value is the?
- A.
  
  Mode
- B.
  
  Median
- C.
  
  Mean
- D.
  
  Coefficient of variation
20.

An index of precision is statistically known as the?
- A.
  
  Median
- B.
  
  Mean
- C.
  
  Standard deviation
- D.
  
  Coefficient of variation
21.

The most frequent value in a collection of data is statistically known as the?
- A.
  
  Mode
- B.
  
  Median
- C.
  
  Mean
- D.
  
  Standard deviation
22.

The middle value of a data set is statistically known as the?
- A.
  
  Mean
- B.
  
  Median
- C.
  
  Mode
- D.
  
  Standard deviation
23.

In a specimen collected for plasma glucose analysis, sodium floride?
- A.
  
  Serves as a coenzyme of hexokinase
- B.
  
  Prevents reactivity of non-glucose reducing substances
- C.
  
  Precipitates proteins
- D.
  
  Inhibits glycolysis
24.

The serum that contributes to most serum osmolality is?
- A.
  
  Glucose
- B.
  
  Sodium
- C.
  
  Chloride
- D.
  
  Urea
25.

Which family of steroid hormones is characterized by an unsaturated A ring?
- A.
  
  Progestins
- B.
  
  Estrogens
- C.
  
  Androgens
- D.
  
  Glucocorticoids

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