Dental Admission Test (DAT) Exam New 2026 Version
with All Questions from Actual Past Exam with and
100% Correct Answers and Rationale
DAT – MOST DIFFICULT & MOST TESTED QUESTIONS
(Biology, Gen Chem, Organic Chem, QR mixed)
1. Which cellular process is most directly affected by a mutation in the promoter region of a gene?
A. Translation
B. Transcription initiation
C. RNA splicing
D. Protein folding
✅ Correct Answer: B
Explanation:
The promoter is where RNA polymerase binds to start transcription. A mutation here affects initiation,
not translation or post-transcriptional processes.
DAT Tip: Promoter = ON/OFF switch for transcription
2. A cell exposed to cyanide will experience failure primarily in which process?
A. Glycolysis
B. Krebs cycle
C. Oxidative phosphorylation
D. Fermentation
✅ Correct Answer: C
Explanation:
Cyanide inhibits cytochrome c oxidase in the electron transport chain → no ATP from oxidative
phosphorylation.
DAT Favorite Concept: ETC inhibitors
, 3. Which immune cell is responsible for antibody production?
A. T-helper cell
B. Cytotoxic T cell
C. Plasma cell
D. Macrophage
✅ Correct Answer: C
Explanation:
Plasma cells are differentiated B cells that secrete antibodies.
4. During which phase of mitosis do sister chromatids separate?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
✅ Correct Answer: C
Explanation:
Anaphase = chromatids pulled apart.
5. Which hormone lowers blood calcium levels?
A. Parathyroid hormone
B. Aldosterone
C. Calcitonin
D. Cortisol
✅ Correct Answer: C
Explanation:
Calcitonin promotes bone deposition of calcium, lowering blood Ca²⁺.
6. Which process generates the most ATP per glucose molecule?
A. Glycolysis
B. Krebs cycle
C. Fermentation
D. Oxidative phosphorylation
✅ Correct Answer: D
with All Questions from Actual Past Exam with and
100% Correct Answers and Rationale
DAT – MOST DIFFICULT & MOST TESTED QUESTIONS
(Biology, Gen Chem, Organic Chem, QR mixed)
1. Which cellular process is most directly affected by a mutation in the promoter region of a gene?
A. Translation
B. Transcription initiation
C. RNA splicing
D. Protein folding
✅ Correct Answer: B
Explanation:
The promoter is where RNA polymerase binds to start transcription. A mutation here affects initiation,
not translation or post-transcriptional processes.
DAT Tip: Promoter = ON/OFF switch for transcription
2. A cell exposed to cyanide will experience failure primarily in which process?
A. Glycolysis
B. Krebs cycle
C. Oxidative phosphorylation
D. Fermentation
✅ Correct Answer: C
Explanation:
Cyanide inhibits cytochrome c oxidase in the electron transport chain → no ATP from oxidative
phosphorylation.
DAT Favorite Concept: ETC inhibitors
, 3. Which immune cell is responsible for antibody production?
A. T-helper cell
B. Cytotoxic T cell
C. Plasma cell
D. Macrophage
✅ Correct Answer: C
Explanation:
Plasma cells are differentiated B cells that secrete antibodies.
4. During which phase of mitosis do sister chromatids separate?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
✅ Correct Answer: C
Explanation:
Anaphase = chromatids pulled apart.
5. Which hormone lowers blood calcium levels?
A. Parathyroid hormone
B. Aldosterone
C. Calcitonin
D. Cortisol
✅ Correct Answer: C
Explanation:
Calcitonin promotes bone deposition of calcium, lowering blood Ca²⁺.
6. Which process generates the most ATP per glucose molecule?
A. Glycolysis
B. Krebs cycle
C. Fermentation
D. Oxidative phosphorylation
✅ Correct Answer: D
