What is the primary purpose of irradiating blood products?
Anonymous Quiz
7%
A) Inactivate pathogens
75%
B) Prevent graft-versus-host disease
3%
C) Extend shelf life
15%
D) Improve oxygen carrying capacity
In thrombocytopenia, which statement about MPV helps differentiate production vs destruction?
Anonymous Quiz
6%
A) Platelet count alone is sufficient
80%
B) MPV is elevated with increased peripheral destruction
11%
C) MPV is elevated only in production defects
3%
D) MPV has no diagnostic value
Which measurements are required to calculate LDL cholesterol using the Friedewald equation?
Anonymous Quiz
3%
A) Total cholesterol only
13%
B) HDL cholesterol only
10%
C) Triglycerides only
75%
D) Total cholesterol, HDL cholesterol, and triglycerides
Which step follows fixation in routine histology?
Anonymous Quiz
68%
A) Dehydration with graded alcohols
30%
B) Embedding in paraffin
3%
C) Sectioning
0%
D) Staining
Which action is essential to maintain aseptic technique during specimen culture?
Anonymous Quiz
41%
A) Open cap away from sterile field
48%
B) Touch agar surface with bare hands
4%
C) Reuse pipette tip
7%
D) Place plates open on bench
Which complement pathway is initiated by antigen-antibody complexes?
Anonymous Quiz
41%
A) Classical pathway
28%
B) Lectin pathway
28%
C) Alternative pathway
4%
D) None
Which CBC parameter represents the average hemoglobin content per red blood cell?
Anonymous Quiz
26%
A) MCV
51%
B) MCH
16%
C) MCHC
8%
D) RDW
Which CBC pattern most often suggests iron deficiency anemia?
Anonymous Quiz
12%
A) Macrocytosis with high MCV
79%
B) Microcytosis with low MCV and low MCHC
8%
C) Normocytic normochromic
1%
D) Hypersegmented neutrophils on smear
Direct Antiglobulin Test (DAT) is used to detect what?
Anonymous Quiz
9%
A) Antiplatelet antibodies
86%
B) Antibodies or complement bound to red cells in vivo
2%
C) Soluble immune complexes
2%
D) Hemoglobins that indicate hemolysis
Which sequence correctly describes the Gram staining procedure steps?
Anonymous Quiz
69%
A) Crystal violet, iodine, decolorization, counterstain
21%
B) Crystal violet, counterstain, iodine, decolorization
10%
C) Iodine, crystal violet, decolorization, counterstain
0%
D) Decolorization, crystal violet, iodine, counterstain
❤1
Which medium is selective for Gram-negative bacteria and differential for lactose fermentation?
Anonymous Quiz
15%
A) Mannitol salt agar
76%
B) MacConkey agar
3%
C) Blood agar
6%
D) Sabouraud dextrose agar
❤1
Which statement about enzyme activity units is correct?
Anonymous Quiz
74%
A) U is the unit name; IU is the international unit
21%
B) U and IU are identical units
5%
C) U stands for micro units
0%
D) IU is always larger than U
What effect does hemolysis have on serum potassium measurement?
Anonymous Quiz
25%
A) Decreases
57%
B) Increases
4%
C) No effect
13%
D) Depends on instrument
In an indirect ELISA, what is measured as the readout?
Anonymous Quiz
5%
A) Bound antigen
13%
B) Bound enzyme activity
80%
C) Bound antibody detected via enzyme-labeled secondary antibody
1%
D) Labeled peptide
Which statement best describes agglutination inhibition?
Anonymous Quiz
53%
A) Presence of soluble antigen prevents lattice formation
24%
B) Antibody excess prevents agglutination
6%
C) Bacteria cause agglutination
18%
D) Cross-linking reagent inhibits agglutination
Which fixative is most commonly used for routine histology?
Anonymous Quiz
88%
A) Formalin (formaldehyde)
7%
B) Acetone
3%
C) Bouin's solution
2%
D) Methanol
FNAC sample adequacy depends on presence of what?
Anonymous Quiz
61%
A) Adequate cellular material
30%
B) Tissue architecture
2%
C) Color
7%
D) Inflammation
Which phase of the lab workflow is most associated with pre-analytical errors?
Anonymous Quiz
14%
A) Analysis
78%
B) Pre-analytical
7%
C) Post-analytical
1%
D) Post-processing
A positive urine nitrite test most strongly indicates the presence of which organism type?
Anonymous Quiz
23%
A) Gram-positive cocci
39%
B) Gram-negative rods
15%
C) Yeasts
23%
D) All bacteria equally
In forward ABO typing, a patient with type A blood will show agglutination with which reagent?
Anonymous Quiz
47%
A) Anti-A only
24%
B) Anti-B only
26%
C) Both anti-A and anti-B
2%
D) Neither