Dental Admission Test (DAT) Exam New 2026
Version with All Questions from Actual Past
Exam with and 100% Correct Answers and
Rationale
Biology (Questions 1–40)
Question 1
What is the primary function of mitochondria?
A. Protein synthesis
B. ATP production
C. Lipid synthesis
D. DNA replication
Correct Answer: B
Rationale: Mitochondria produce ATP via oxidative phosphorylation.
Question 2
Which process produces gametes in animals?
A. Mitosis
B. Meiosis
C. Binary fission
D. Budding
Correct Answer: B
Rationale: Meiosis reduces chromosome number by half to produce haploid gametes.
Question 3
Which organelle contains chlorophyll in plant cells?
A. Nucleus
B. Chloroplast
C. Mitochondrion
D. Lysosome
Correct Answer: B
Rationale: Chloroplasts are the site of photosynthesis, containing chlorophyll.
Question 4
What is the role of tRNA in protein synthesis?
A. Carries genetic code
B. Transports amino acids
C. Catalyzes peptide bonds
D. Transcribes DNA
Correct Answer: B
Rationale: tRNA delivers amino acids to ribosomes during translation.
Question 5
Which hormone increases blood calcium levels?
A. Calcitonin
B. Parathyroid hormone
,C. Insulin
D. Glucagon
Correct Answer: B
Rationale: Parathyroid hormone stimulates osteoclasts to release calcium from bones.
Question 6
What is the primary source of energy for Earth’s ecosystems?
A. Geothermal heat
B. Solar energy
C. Chemical energy
D. Biomass
Correct Answer: B
Rationale: Solar energy drives photosynthesis, the foundation of ecosystems.
Question 7
Which cell junction allows direct communication between adjacent cells?
A. Tight junction
B. Gap junction
C. Desmosome
D. Adherens junction
Correct Answer: B
Rationale: Gap junctions permit the passage of small molecules between cells.
Question 8
What is the end product of glycolysis?
A. Glucose
B. Pyruvate
C. Acetyl-CoA
D. Lactate
Correct Answer: B
Rationale: Glycolysis converts glucose to two pyruvate molecules under aerobic conditions.
Question 9
Which system is responsible for oxygen transport in the body?
A. Nervous system
B. Circulatory system
C. Endocrine system
D. Lymphatic system
Correct Answer: B
Rationale: The circulatory system transports oxygen via hemoglobin in red blood cells.
Question 10
What is the primary function of the large intestine?
A. Nutrient absorption
B. Water absorption
C. Protein digestion
D. Fat emulsification
Correct Answer: B
Rationale: The large intestine absorbs water, forming feces.
Question 11
Where does gas exchange occur in the lungs?
,A. Bronchi
B. Alveoli
C. Trachea
D. Bronchioles
Correct Answer: B
Rationale: Alveoli are thin-walled structures for gas exchange.
Question 12
What is the primary source of genetic variation in meiosis?
A. Mutation
B. Crossing over
C. Transcription
D. Translation
Correct Answer: B
Rationale: Crossing over during prophase I shuffles genetic material.
Question 13
What is the final electron acceptor in the electron transport chain?
A. NAD⁺
B. Oxygen
C. FAD
D. Glucose
Correct Answer: B
Rationale: Oxygen accepts electrons, forming water.
Question 14
What is the function of the Golgi apparatus?
A. Protein synthesis
B. Protein modification and packaging
C. ATP production
D. DNA replication
Correct Answer: B
Rationale: The Golgi modifies, sorts, and packages proteins for secretion or use.
Question 15
Which symbiotic relationship benefits both organisms?
A. Parasitism
B. Commensalism
C. Mutualism
D. Predation
Correct Answer: C
Rationale: Mutualism benefits both species (e.g., bees and flowers).
Question 16
What is the primary function of the nephron?
A. Blood filtration and urine formation
B. Hormone secretion
C. Gas exchange
D. Nutrient absorption
Correct Answer: A
Rationale: Nephrons filter blood and produce urine in the kidneys.
, Question 17
Which enzyme begins starch digestion in the mouth?
A. Lipase
B. Amylase
C. Pepsin
D. Trypsin
Correct Answer: B
Rationale: Salivary amylase (ptyalin) breaks down starch into sugars.
Question 18
What does the autonomic nervous system regulate?
A. Voluntary movements
B. Involuntary functions like heart rate
C. Sensory processing
D. Memory formation
Correct Answer: B
Rationale: The autonomic nervous system controls involuntary functions.
Question 19
Which structure in sperm provides energy for motility?
A. Nucleus
B. Mitochondria
C. Acrosome
D. Flagellum
Correct Answer: B
Rationale: Mitochondria in the sperm’s midpiece produce ATP for motility.
Question 20
What is the primary function of red blood cells?
A. Immune response
B. Oxygen transport
C. Blood clotting
D. Hormone secretion
Correct Answer: B
Rationale: Red blood cells carry oxygen via hemoglobin.
Question 21
Which process is programmed cell death?
A. Necrosis
B. Apoptosis
C. Mitosis
D. Meiosis
Correct Answer: B
Rationale: Apoptosis is controlled cell death for development and homeostasis.
Question 22
Where are most nutrients absorbed in the digestive system?
A. Stomach
B. Small intestine
C. Large intestine
D. Esophagus
Version with All Questions from Actual Past
Exam with and 100% Correct Answers and
Rationale
Biology (Questions 1–40)
Question 1
What is the primary function of mitochondria?
A. Protein synthesis
B. ATP production
C. Lipid synthesis
D. DNA replication
Correct Answer: B
Rationale: Mitochondria produce ATP via oxidative phosphorylation.
Question 2
Which process produces gametes in animals?
A. Mitosis
B. Meiosis
C. Binary fission
D. Budding
Correct Answer: B
Rationale: Meiosis reduces chromosome number by half to produce haploid gametes.
Question 3
Which organelle contains chlorophyll in plant cells?
A. Nucleus
B. Chloroplast
C. Mitochondrion
D. Lysosome
Correct Answer: B
Rationale: Chloroplasts are the site of photosynthesis, containing chlorophyll.
Question 4
What is the role of tRNA in protein synthesis?
A. Carries genetic code
B. Transports amino acids
C. Catalyzes peptide bonds
D. Transcribes DNA
Correct Answer: B
Rationale: tRNA delivers amino acids to ribosomes during translation.
Question 5
Which hormone increases blood calcium levels?
A. Calcitonin
B. Parathyroid hormone
,C. Insulin
D. Glucagon
Correct Answer: B
Rationale: Parathyroid hormone stimulates osteoclasts to release calcium from bones.
Question 6
What is the primary source of energy for Earth’s ecosystems?
A. Geothermal heat
B. Solar energy
C. Chemical energy
D. Biomass
Correct Answer: B
Rationale: Solar energy drives photosynthesis, the foundation of ecosystems.
Question 7
Which cell junction allows direct communication between adjacent cells?
A. Tight junction
B. Gap junction
C. Desmosome
D. Adherens junction
Correct Answer: B
Rationale: Gap junctions permit the passage of small molecules between cells.
Question 8
What is the end product of glycolysis?
A. Glucose
B. Pyruvate
C. Acetyl-CoA
D. Lactate
Correct Answer: B
Rationale: Glycolysis converts glucose to two pyruvate molecules under aerobic conditions.
Question 9
Which system is responsible for oxygen transport in the body?
A. Nervous system
B. Circulatory system
C. Endocrine system
D. Lymphatic system
Correct Answer: B
Rationale: The circulatory system transports oxygen via hemoglobin in red blood cells.
Question 10
What is the primary function of the large intestine?
A. Nutrient absorption
B. Water absorption
C. Protein digestion
D. Fat emulsification
Correct Answer: B
Rationale: The large intestine absorbs water, forming feces.
Question 11
Where does gas exchange occur in the lungs?
,A. Bronchi
B. Alveoli
C. Trachea
D. Bronchioles
Correct Answer: B
Rationale: Alveoli are thin-walled structures for gas exchange.
Question 12
What is the primary source of genetic variation in meiosis?
A. Mutation
B. Crossing over
C. Transcription
D. Translation
Correct Answer: B
Rationale: Crossing over during prophase I shuffles genetic material.
Question 13
What is the final electron acceptor in the electron transport chain?
A. NAD⁺
B. Oxygen
C. FAD
D. Glucose
Correct Answer: B
Rationale: Oxygen accepts electrons, forming water.
Question 14
What is the function of the Golgi apparatus?
A. Protein synthesis
B. Protein modification and packaging
C. ATP production
D. DNA replication
Correct Answer: B
Rationale: The Golgi modifies, sorts, and packages proteins for secretion or use.
Question 15
Which symbiotic relationship benefits both organisms?
A. Parasitism
B. Commensalism
C. Mutualism
D. Predation
Correct Answer: C
Rationale: Mutualism benefits both species (e.g., bees and flowers).
Question 16
What is the primary function of the nephron?
A. Blood filtration and urine formation
B. Hormone secretion
C. Gas exchange
D. Nutrient absorption
Correct Answer: A
Rationale: Nephrons filter blood and produce urine in the kidneys.
, Question 17
Which enzyme begins starch digestion in the mouth?
A. Lipase
B. Amylase
C. Pepsin
D. Trypsin
Correct Answer: B
Rationale: Salivary amylase (ptyalin) breaks down starch into sugars.
Question 18
What does the autonomic nervous system regulate?
A. Voluntary movements
B. Involuntary functions like heart rate
C. Sensory processing
D. Memory formation
Correct Answer: B
Rationale: The autonomic nervous system controls involuntary functions.
Question 19
Which structure in sperm provides energy for motility?
A. Nucleus
B. Mitochondria
C. Acrosome
D. Flagellum
Correct Answer: B
Rationale: Mitochondria in the sperm’s midpiece produce ATP for motility.
Question 20
What is the primary function of red blood cells?
A. Immune response
B. Oxygen transport
C. Blood clotting
D. Hormone secretion
Correct Answer: B
Rationale: Red blood cells carry oxygen via hemoglobin.
Question 21
Which process is programmed cell death?
A. Necrosis
B. Apoptosis
C. Mitosis
D. Meiosis
Correct Answer: B
Rationale: Apoptosis is controlled cell death for development and homeostasis.
Question 22
Where are most nutrients absorbed in the digestive system?
A. Stomach
B. Small intestine
C. Large intestine
D. Esophagus
