Practice Test Geeks(STP) Scientist Training Programme Practice Test
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Clinical Sciences Flashcards

7 cards from real STP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. A 60-year-old male has serum protein electrophoresis showing a monoclonal band in the gamma region. Serum free light chain ratio is 8.2 (normal 0.26-1.65). What additional investigation is most critical to differentiate MGUS from multiple myeloma?

    Answer: Bone marrow trephine biopsy

    Bone marrow trephine biopsy is essential to quantify plasma cell percentage; multiple myeloma requires ≥10% clonal plasma cells plus myeloma-defining events, differentiating it from MGUS.

  2. In platelet function testing, a patient shows normal platelet aggregation with collagen but absent aggregation with ADP and absent second wave with epinephrine. Which disorder does this pattern suggest?

    Answer: ADP receptor (P2Y12) defect

    Absent ADP-induced aggregation and absence of the epinephrine second wave (which requires ADP amplification) with normal collagen aggregation is the hallmark pattern of P2Y12 receptor deficiency.

  3. A reference interval study is performed on 200 healthy adults. Using a non-parametric method, what percentile range defines the standard reference interval?

    Answer: 2.5th to 97.5th percentile

    The standard clinical reference interval encompasses the central 95% of the reference population, defined by the 2.5th to 97.5th percentiles using non-parametric or parametric methods per CLSI EP28-A3c.

  4. Which cytogenetic abnormality is the most common translocation found in acute promyelocytic leukemia (APL) and determines eligibility for ATRA therapy?

    Answer: t(15;17)(q24;q21)

    The t(15;17) translocation creates the PML-RARA fusion gene in APL; this fusion protein drives the disease and is specifically targeted by all-trans retinoic acid (ATRA), which induces differentiation.

  5. A urine culture grows 10^5 CFU/mL of E. coli. The patient is asymptomatic. Which action is most appropriate according to UK clinical guidelines?

    Answer: Treat only if the patient is pregnant or pre-operative

    Asymptomatic bacteriuria should not be treated in most populations; UK guidelines recommend treatment only in pregnant women and patients undergoing urological procedures to prevent complications.

  6. In the liver function test panel, which enzyme elevation most specifically indicates cholestatic liver disease rather than hepatocellular damage?

    Answer: ALP (alkaline phosphatase)

    ALP (alkaline phosphatase) is localized to the bile canalicular membrane and is specifically elevated in cholestatic conditions; elevated ALP with raised GGT confirms biliary rather than bone origin.

  7. A researcher reports a new biomarker with an AUC (area under the ROC curve) of 0.95 for diagnosing sepsis. Which statement best describes this result?

    Answer: The biomarker has excellent discriminatory ability between sepsis and non-sepsis patients

    An AUC of 0.95 indicates excellent overall discriminatory ability of the biomarker; AUC represents the probability that the biomarker ranks a random positive case higher than a random negative case.