Periodic Acid-Schiff (PAS) Staining MCQs Mock Test (30 MCQs)

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PAS Staining Guide: Master carbohydrate staining for fungi, renal disease & mucins with step-by-step protocol and diagnostic interpretation. PAS Staining Quiz: 30+ MCQs on fungal staining, glycogen detection & renal pathology applications. Ideal for histotech and pathology exams.

Learn PAS staining, a fundamental histochemical technique for detecting glycogen, mucins, and fungal organisms in tissue samples. This comprehensive guide covers:

✓ Chemical Principle:

  • Periodic acid oxidation of carbohydrates
  • Schiff reagent reaction to produce magenta color

✓ Key Diagnostic Uses:

  • Fungal identification (Candida, Aspergillus)
  • Renal pathology (basement membrane thickening)
  • Glycogen storage diseases
  • Adenocarcinomas (mucin detection)

✓ Protocol Variations:

  • PAS with diastase digestion (glycogen confirmation)
  • Combined PAS-Alcian blue for mucin typing

✓ Interpretation Guide:

  • Intensity scoring (0 to 4+)
  • Common artifacts and troubleshooting

Essential for histotechnologists, pathologists, and microbiology labs working in anatomic pathology and fungal diagnostics.

Challenge your knowledge with 40+ PAS staining MCQs covering:
◼️ Fungal element identification (hyphae vs. yeast forms)
◼️ Renal biopsy interpretation (diabetic nephropathy)
◼️ Glycogen vs. mucin differentiation
◼️ PAS-D technique applications

Perfect for:

  • Pathology board exams (USMLE, FRCPath)
  • Histotechnology certification (HT/HTL)
  • Medical mycology training
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Periodic Acid-Schiff (PAS) Staining MCQs Mock Test

Periodic Acid-Schiff (PAS) Staining of Viruses MCQs Mock Test

Challenge your knowledge with 30+ PAS staining MCQs covering:
◼️ Fungal element identification (hyphae vs. yeast forms)
◼️ Renal biopsy interpretation (diabetic nephropathy)
◼️ Glycogen vs. mucin differentiation
◼️ PAS-D technique applications

Perfect for:

  • Pathology board exams (USMLE, FRCPath)

  • Histotechnology certification (HT/HTL)

  • Medical mycology training

Read Full Article: Periodic Acid-Schiff (PAS) Staining 50 FAQ and 30 MCQs

1 / 30

Category: Clinical Laboratory

Schiff’s reagent should be stored:

2 / 30

Category: Clinical Laboratory

What color do PAS-positive structures typically stain?

3 / 30

Category: Clinical Laboratory

How long should tissue sections be treated with periodic acid?

4 / 30

Category: Clinical Laboratory

What is the purpose of diastase digestion in PAS staining?

5 / 30

Category: Clinical Laboratory

PAS staining is contraindicated for:

6 / 30

Category: Clinical Laboratory

If nuclei stain pink instead of blue, what was likely skipped?

7 / 30

Category: Clinical Laboratory

In renal pathology, PAS helps visualize:

8 / 30

Category: Clinical Laboratory

Which fixative is BEST for preserving glycogen for PAS staining?

9 / 30

Category: Clinical Laboratory

Periodic acid is hazardous because it is:

10 / 30

Category: Clinical Laboratory

Which stain is MORE sensitive for fungi than PAS?

11 / 30

Category: Clinical Laboratory

Faint PAS staining may result from:

12 / 30

Category: Clinical Laboratory

High background staining in PAS can be reduced by:

13 / 30

Category: Clinical Laboratory

What is the primary purpose of PAS staining?

14 / 30

Category: Clinical Laboratory

Why might glycogen be absent in PAS-stained liver tissue?

15 / 30

Category: Clinical Laboratory

Which fixative interferes with diastase digestion?

16 / 30

Category: Clinical Laboratory

PAS staining is most useful for diagnosing:

17 / 30

Category: Clinical Laboratory

What is the role of Schiff’s reagent in PAS staining?

18 / 30

Category: Clinical Laboratory

Which chemical group is oxidized by periodic acid in PAS staining?

19 / 30

Category: Clinical Laboratory

Which condition would show PAS-positive diastase-resistant material?

20 / 30

Category: Clinical Laboratory

Which of the following is NOT PAS-positive?

21 / 30

Category: Clinical Laboratory

PAS staining correlates strongly with which diagnostic technique for autoimmune diseases?

22 / 30

Category: Clinical Laboratory

Which structure would NOT stain with PAS?

23 / 30

Category: Clinical Laboratory

PAS is inferior to mucicarmine for detecting:

24 / 30

Category: Clinical Laboratory

Expired Schiff’s reagent may cause:

25 / 30

Category: Clinical Laboratory

Which oxidant is preferred for fungal staining to reduce background?

26 / 30

Category: Clinical Laboratory

PAS-negative fungi may indicate:

27 / 30

Category: Clinical Laboratory

How do you test the quality of Schiff’s reagent?

28 / 30

Category: Clinical Laboratory

What is used to counterstain nuclei in PAS staining?

29 / 30

Category: Clinical Laboratory

Microwave PAS staining is used for:

30 / 30

Category: Clinical Laboratory

PAS-D (diastase) staining helps differentiate:

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Read Full Article: Periodic Acid-Schiff (PAS) Staining 50 FAQ and 30 MCQs

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