ASCP
Histotechnology Practice Test 2026 | HT(ASCP) Exam
Questions, Answers & Detailed Rationales | Study Guide
This Resource Includes
➢ ASCP HT Histotechnology practice test
➢ HT(ASCP) exam-style practice questions
➢ Questions and answers with detailed
rationales
, ASCP Histotechnology Practice Test 2026 |
HT(ASCP) Exam Questions, Answers & Detailed
Rationales | Study Guide
1. Potassium permanganate: The oxidizing agent used in the Gomori
chrome alum hematoxylin phloxine procedure for demonstrating
alpha and beta cells of the pancreas is:
A. Potassium permanganate
B. Formaldehyde
C. Osmium tetroxide
D. Potassium dichromate
Correct Answer: A
Rationale: In the Gomori chrome alum hematoxylin phloxine
procedure, potassium permanganate is used as the oxidizing agent. It
oxidizes the beta cell granules, allowing them to be stained by the
chrome alum hematoxylin. Alpha cells are stained by phloxine. This
differentiation is critical for identifying pancreatic islet cell types.
2. Enzyme histochemistry: Simultaneous coupling is a technique used
in:
,A. Immunohistochemistry
B. Enzyme histochemistry
C. In situ hybridization
D. Autoradiography
Correct Answer: B
Rationale: Simultaneous coupling is a technique used in enzyme
histochemistry where the capture reagent (e.g., a diazonium salt) is
present in the incubation medium at the same time as the substrate.
This allows the reaction product to be captured immediately as it is
formed, preventing diffusion and improving localization.
3. Light and heavy chains: Antibody diversity is due to different amino
acid sequences of the variable regions of the:
A. Light chains only
B. Heavy chains only
C. Both light and heavy chains
D. Constant regions
Correct Answer: C
Rationale: Antibody diversity is generated by variations in the amino
acid sequences of the variable regions of both light and heavy chains.
, The variable regions form the antigen-binding site, and their
combinatorial diversity allows the immune system to recognize a vast
array of antigens.
4. Alizarin red S: A birefringent reaction product is produced following
staining of calcium deposits with which stain?
A. Alizarin red S
B. Von Kossa
C. Prussian blue
D. Oil red O
Correct Answer: A
Rationale: Alizarin red S binds to calcium deposits and produces a
birefringent reaction product under polarized light. This property is
useful for confirming the presence of calcium in tissue sections. Von
Kossa also demonstrates calcium but does not produce a birefringent
product.
5. Periodic acid - Schiff: One of the most useful yet simple techniques
for identifying cell types in the pituitary gland is the:
A. Periodic acid-Schiff (PAS)
B. Hematoxylin and eosin
Histotechnology Practice Test 2026 | HT(ASCP) Exam
Questions, Answers & Detailed Rationales | Study Guide
This Resource Includes
➢ ASCP HT Histotechnology practice test
➢ HT(ASCP) exam-style practice questions
➢ Questions and answers with detailed
rationales
, ASCP Histotechnology Practice Test 2026 |
HT(ASCP) Exam Questions, Answers & Detailed
Rationales | Study Guide
1. Potassium permanganate: The oxidizing agent used in the Gomori
chrome alum hematoxylin phloxine procedure for demonstrating
alpha and beta cells of the pancreas is:
A. Potassium permanganate
B. Formaldehyde
C. Osmium tetroxide
D. Potassium dichromate
Correct Answer: A
Rationale: In the Gomori chrome alum hematoxylin phloxine
procedure, potassium permanganate is used as the oxidizing agent. It
oxidizes the beta cell granules, allowing them to be stained by the
chrome alum hematoxylin. Alpha cells are stained by phloxine. This
differentiation is critical for identifying pancreatic islet cell types.
2. Enzyme histochemistry: Simultaneous coupling is a technique used
in:
,A. Immunohistochemistry
B. Enzyme histochemistry
C. In situ hybridization
D. Autoradiography
Correct Answer: B
Rationale: Simultaneous coupling is a technique used in enzyme
histochemistry where the capture reagent (e.g., a diazonium salt) is
present in the incubation medium at the same time as the substrate.
This allows the reaction product to be captured immediately as it is
formed, preventing diffusion and improving localization.
3. Light and heavy chains: Antibody diversity is due to different amino
acid sequences of the variable regions of the:
A. Light chains only
B. Heavy chains only
C. Both light and heavy chains
D. Constant regions
Correct Answer: C
Rationale: Antibody diversity is generated by variations in the amino
acid sequences of the variable regions of both light and heavy chains.
, The variable regions form the antigen-binding site, and their
combinatorial diversity allows the immune system to recognize a vast
array of antigens.
4. Alizarin red S: A birefringent reaction product is produced following
staining of calcium deposits with which stain?
A. Alizarin red S
B. Von Kossa
C. Prussian blue
D. Oil red O
Correct Answer: A
Rationale: Alizarin red S binds to calcium deposits and produces a
birefringent reaction product under polarized light. This property is
useful for confirming the presence of calcium in tissue sections. Von
Kossa also demonstrates calcium but does not produce a birefringent
product.
5. Periodic acid - Schiff: One of the most useful yet simple techniques
for identifying cell types in the pituitary gland is the:
A. Periodic acid-Schiff (PAS)
B. Hematoxylin and eosin
