download the pdf at https://learnexams.com/search/study?query=aqa
..MLT (MEDICAL LABORATORY TECHNICIANS) ASCP CHEMISTRY PRACTICE
MLT (Medical Laboratory Technicians) ASCP
Chemistry practical questions 2024-2025 with
Complete solutions /Guide rated A+
An automated method of measuring chloride that generates silver ions in the reaction is called:
Select the correct answer.
A. Coulometry
B. Potentiometry
C. Chromatography
D. Polarography
E. Densitometry (Precise answer: – A;
Rationale: Coulometry works on the principle of Faraday's law according to which a silver anode releases
silver ions (titration) at a constant rate when a constant potential is applied. The silver ions react
with chloride in a fixed volume of solution to form silver chloride. The time it takes for chloride to penetrate
the unknown solution to react with silver ions is proportional to the chloride activity in the
sample.
When evaluating a patient for a suspected diagnosis of Wilson's disease, low plasma values
ceruloplasmin would be expected with:
Choose the best answers: multiple answers apply
A. Decreased copper in urine
B. Increased copper in urine
C. Normal urinary copper
D. Decreased serum copper
E. Increased serum copper (Specific answer: – B&D;
Rationale: Ceruloplasmin is the main protein transporting copper in the blood. Though there is
other conditions (not listed) that may cause low ceruloplasmin levels (i.e. Menkes disease,
overdose of vitamin C, etc.), the best answer among those given to this question is an increase in the amount of urine
copper and decreased serum copper. Ceruloplasmin is mainly ordered with serum and/or
Urine copper tests to help diagnose Wilson's disease, an inherited condition associated with decreased

MLT (MEDICAL LABORATORY TECHNICIANS) ASCP CHEMISTRY PRACTICE
ceruloplasmin levels and excess copper storage in the liver, brain and other organs. However
there is an increase in the level of copper deposited throughout the body, serum copper levels are
paradoxically low with a characteristic increase in urinary copper levels which facilitates this diagnosis.
A serum sample is received at the laboratory's clinical chemistry department. The first time the
The sample is analyzed, the result is 600 mg/dL. To verify this result (in accordance with this hospital's policy), the
tech prepares 2 ml of a 1:2 dilution of the original sample. If only 1 ml of this sample is analyzed, what
would be the result? Let's assume that the original value of 600 mg/dL was correct and that the
The instrument did not automatically perform a dilution calculation.
Select the correct answer.
A. 100 mg/dL
B. 300 mg/dL
C. 600 mg/dL
D. 1,100 mg/dL
E. Not enough information provided (Precise answer: – B;
Rationale: The correct answer is option B: 300 mg/dL. A 1:2 dilution of a sample initially
contained 600 mg for each deciliter, would now contain only 300 mg for each deciliter. In other
In other words, it is 1/2 as concentrated as the original sample. The volume of this sample which is then
analyzed has no impact on the concentration read by the instrument. We could dose 10
microliters or the full 2 ml of the problem and the concentration would remain at 300 mg/dl.
The concentration is independent of the volume tested.
A;
There is a generalized increase in the gamma band, corresponding to polyclonal
hypergammaglobulinemia, as seen in chronic inflammation as well as increased alpha-1 and
alpha-2 regions.
(Precise answer: – This serum protein electrophoresis analysis most likely represents which condition?
Select the correct answer.
A. Chronic inflammation
B. Myocardial infarction
C. Liver disease

MLT (MEDICAL LABORATORY TECHNICIANS) ASCP CHEMISTRY PRACTICE
D. Monoclonal gammopathy
A 56-year-old woman was taken to the emergency room in a coma by her employer's nurse. She had
lost 35 pounds in 3 months; she was always thirsty; drink lots of water and run towards the
bathroom. Here are his lab results:
Results: (indicates reference range)
pH: 7.11 (7.35-7.45)
pCO2: 21 mm Hg (35-45 mm Hg)
Glucose: 950 mg/dL (60-110 mg/dL)
Serum osmolality: 365 mOsm/Kg (275-295 mOsm/Kg)
Urinary ketone: strongly positive (negative)
Urinary blood glucose: strongly positive (negative)

..
..
..

Please take the opportunity to connect and share this video with your friends and family if you find it useful.