DAT Exam
Question 1. Which organelle is primarily responsible for producing ATP via cellular respiration in
eukaryotic cells?
A) Lysosome
B) Mitochondrion
C) Golgi apparatus
D) Ribosome
Answer: B
Explanation: The mitochondrion is known as the “powerhouse” of the cell and is the site of ATP
production through cellular respiration.
Question 2. Which process results in the formation of gametes with half the chromosome number of
the parent cell?
A) Mitosis
B) Binary fission
C) Meiosis
D) Budding
Answer: C
Explanation: Meiosis produces gametes (sperm and eggs) with half the chromosome number,
ensuring genetic diversity and stability across generations.
Question 3. Which macromolecule is encoded directly by DNA sequences?
A) Proteins
B) Lipids
C) Polysaccharides
D) Steroids
Answer: A
Explanation: DNA sequences code for proteins through the processes of transcription and
translation.
Question 4. Which structure is found in prokaryotic cells but not in eukaryotic animal cells?
A) Nucleus
B) Mitochondria
C) Cell wall
D) Endoplasmic reticulum
Answer: C
Explanation: Prokaryotes, such as bacteria, have a cell wall, which animal cells lack.
Question 5. What is the function of the rough endoplasmic reticulum?
A) Lipid synthesis
B) Protein synthesis and modification
C) DNA replication
D) Detoxification
Answer: B
Explanation: The rough ER is studded with ribosomes and is involved in the synthesis and
modification of proteins.
Question 6. Which molecule serves as the primary genetic material in most living organisms?
A) RNA
B) DNA
C) Protein
, DAT Exam
D) Lipid
Answer: B
Explanation: DNA (deoxyribonucleic acid) is the primary genetic material in nearly all living
organisms.
Question 7. Which enzyme is responsible for unzipping the DNA double helix during replication?
A) Ligase
B) Helicase
C) Polymerase
D) Primase
Answer: B
Explanation: Helicase unwinds and separates the two DNA strands during replication.
Question 8. What is the starting codon for translation in most organisms?
A) UAA
B) AUG
C) UGA
D) UAG
Answer: B
Explanation: AUG codes for methionine and is the universal start codon in translation.
Question 9. Which technique amplifies specific DNA sequences for analysis?
A) Gel electrophoresis
B) Polymerase chain reaction (PCR)
C) Western blot
D) Northern blot
Answer: B
Explanation: PCR is used to amplify small segments of DNA for various analyses.
Question 10. Which of the following best describes the function of restriction enzymes?
A) Synthesizing DNA
B) Cutting DNA at specific sequences
C) Ligating DNA fragments
D) Transcribing RNA
Answer: B
Explanation: Restriction enzymes recognize specific DNA sequences and cut the DNA at those sites,
which is essential in recombinant DNA technology.
Question 11. Which taxonomic rank is directly above genus?
A) Species
B) Order
C) Family
D) Class
Answer: C
Explanation: In taxonomy, family is the rank just above genus.
Question 12. What type of genetic material do most viruses contain?
A) Only DNA
B) Only RNA
C) Either DNA or RNA
, DAT Exam
D) Both DNA and RNA
Answer: C
Explanation: Viruses can have genomes composed of either DNA or RNA, but not both.
Question 13. Which kingdom contains organisms that are typically multicellular, photosynthetic, and
have cell walls composed of cellulose?
A) Fungi
B) Plantae
C) Protista
D) Animalia
Answer: B
Explanation: The kingdom Plantae consists of multicellular, photosynthetic organisms with cellulose
cell walls.
Question 14. Which bacterial structure is responsible for motility?
A) Capsule
B) Pili
C) Flagellum
D) Ribosome
Answer: C
Explanation: Flagella are whip-like structures that enable bacteria to move.
Question 15. Which fungal structure produces spores for reproduction?
A) Hypha
B) Mycelium
C) Sporangium
D) Rhizoid
Answer: C
Explanation: Sporangia are spore-producing structures in fungi.
Question 16. Which group of animals is characterized by having a notochord, dorsal nerve cord, and
pharyngeal slits at some stage of development?
A) Arthropods
B) Nematodes
C) Chordates
D) Mollusks
Answer: C
Explanation: Chordates possess these features, which are defining characteristics of the phylum.
Question 17. Which circulatory pathway carries blood from the heart to the lungs and back?
A) Systemic
B) Pulmonary
C) Coronary
D) Portal
Answer: B
Explanation: The pulmonary circuit carries deoxygenated blood from the heart to the lungs and back.
Question 18. Which blood cells are primarily responsible for immune defense?
A) Erythrocytes
B) Thrombocytes
, DAT Exam
C) Leukocytes
D) Platelets
Answer: C
Explanation: Leukocytes (white blood cells) defend the body against pathogens.
Question 19. Where does gas exchange occur in the human lungs?
A) Bronchi
B) Alveoli
C) Trachea
D) Diaphragm
Answer: B
Explanation: Alveoli are the tiny sacs where oxygen and carbon dioxide are exchanged between air
and blood.
Question 20. Which enzyme, present in saliva, begins the digestion of starch?
A) Lactase
B) Pepsin
C) Amylase
D) Sucrase
Answer: C
Explanation: Salivary amylase initiates the breakdown of starch into sugars in the mouth.
Question 21. What is the primary function of the large intestine?
A) Protein digestion
B) Water reabsorption
C) Fat absorption
D) Production of bile
Answer: B
Explanation: The large intestine primarily reabsorbs water and forms feces.
Question 22. Which part of the neuron receives incoming signals?
A) Axon
B) Dendrite
C) Synaptic terminal
D) Myelin sheath
Answer: B
Explanation: Dendrites receive chemical and electrical signals from other neurons.
Question 23. What is the functional unit of the kidney responsible for urine formation?
A) Alveolus
B) Nephron
C) Glomerulus
D) Collecting duct
Answer: B
Explanation: The nephron is the fundamental unit that filters blood and forms urine.
Question 24. Which hormone regulates blood glucose by promoting cellular uptake of glucose?
A) Glucagon
B) Thyroxine
C) Insulin
Question 1. Which organelle is primarily responsible for producing ATP via cellular respiration in
eukaryotic cells?
A) Lysosome
B) Mitochondrion
C) Golgi apparatus
D) Ribosome
Answer: B
Explanation: The mitochondrion is known as the “powerhouse” of the cell and is the site of ATP
production through cellular respiration.
Question 2. Which process results in the formation of gametes with half the chromosome number of
the parent cell?
A) Mitosis
B) Binary fission
C) Meiosis
D) Budding
Answer: C
Explanation: Meiosis produces gametes (sperm and eggs) with half the chromosome number,
ensuring genetic diversity and stability across generations.
Question 3. Which macromolecule is encoded directly by DNA sequences?
A) Proteins
B) Lipids
C) Polysaccharides
D) Steroids
Answer: A
Explanation: DNA sequences code for proteins through the processes of transcription and
translation.
Question 4. Which structure is found in prokaryotic cells but not in eukaryotic animal cells?
A) Nucleus
B) Mitochondria
C) Cell wall
D) Endoplasmic reticulum
Answer: C
Explanation: Prokaryotes, such as bacteria, have a cell wall, which animal cells lack.
Question 5. What is the function of the rough endoplasmic reticulum?
A) Lipid synthesis
B) Protein synthesis and modification
C) DNA replication
D) Detoxification
Answer: B
Explanation: The rough ER is studded with ribosomes and is involved in the synthesis and
modification of proteins.
Question 6. Which molecule serves as the primary genetic material in most living organisms?
A) RNA
B) DNA
C) Protein
, DAT Exam
D) Lipid
Answer: B
Explanation: DNA (deoxyribonucleic acid) is the primary genetic material in nearly all living
organisms.
Question 7. Which enzyme is responsible for unzipping the DNA double helix during replication?
A) Ligase
B) Helicase
C) Polymerase
D) Primase
Answer: B
Explanation: Helicase unwinds and separates the two DNA strands during replication.
Question 8. What is the starting codon for translation in most organisms?
A) UAA
B) AUG
C) UGA
D) UAG
Answer: B
Explanation: AUG codes for methionine and is the universal start codon in translation.
Question 9. Which technique amplifies specific DNA sequences for analysis?
A) Gel electrophoresis
B) Polymerase chain reaction (PCR)
C) Western blot
D) Northern blot
Answer: B
Explanation: PCR is used to amplify small segments of DNA for various analyses.
Question 10. Which of the following best describes the function of restriction enzymes?
A) Synthesizing DNA
B) Cutting DNA at specific sequences
C) Ligating DNA fragments
D) Transcribing RNA
Answer: B
Explanation: Restriction enzymes recognize specific DNA sequences and cut the DNA at those sites,
which is essential in recombinant DNA technology.
Question 11. Which taxonomic rank is directly above genus?
A) Species
B) Order
C) Family
D) Class
Answer: C
Explanation: In taxonomy, family is the rank just above genus.
Question 12. What type of genetic material do most viruses contain?
A) Only DNA
B) Only RNA
C) Either DNA or RNA
, DAT Exam
D) Both DNA and RNA
Answer: C
Explanation: Viruses can have genomes composed of either DNA or RNA, but not both.
Question 13. Which kingdom contains organisms that are typically multicellular, photosynthetic, and
have cell walls composed of cellulose?
A) Fungi
B) Plantae
C) Protista
D) Animalia
Answer: B
Explanation: The kingdom Plantae consists of multicellular, photosynthetic organisms with cellulose
cell walls.
Question 14. Which bacterial structure is responsible for motility?
A) Capsule
B) Pili
C) Flagellum
D) Ribosome
Answer: C
Explanation: Flagella are whip-like structures that enable bacteria to move.
Question 15. Which fungal structure produces spores for reproduction?
A) Hypha
B) Mycelium
C) Sporangium
D) Rhizoid
Answer: C
Explanation: Sporangia are spore-producing structures in fungi.
Question 16. Which group of animals is characterized by having a notochord, dorsal nerve cord, and
pharyngeal slits at some stage of development?
A) Arthropods
B) Nematodes
C) Chordates
D) Mollusks
Answer: C
Explanation: Chordates possess these features, which are defining characteristics of the phylum.
Question 17. Which circulatory pathway carries blood from the heart to the lungs and back?
A) Systemic
B) Pulmonary
C) Coronary
D) Portal
Answer: B
Explanation: The pulmonary circuit carries deoxygenated blood from the heart to the lungs and back.
Question 18. Which blood cells are primarily responsible for immune defense?
A) Erythrocytes
B) Thrombocytes
, DAT Exam
C) Leukocytes
D) Platelets
Answer: C
Explanation: Leukocytes (white blood cells) defend the body against pathogens.
Question 19. Where does gas exchange occur in the human lungs?
A) Bronchi
B) Alveoli
C) Trachea
D) Diaphragm
Answer: B
Explanation: Alveoli are the tiny sacs where oxygen and carbon dioxide are exchanged between air
and blood.
Question 20. Which enzyme, present in saliva, begins the digestion of starch?
A) Lactase
B) Pepsin
C) Amylase
D) Sucrase
Answer: C
Explanation: Salivary amylase initiates the breakdown of starch into sugars in the mouth.
Question 21. What is the primary function of the large intestine?
A) Protein digestion
B) Water reabsorption
C) Fat absorption
D) Production of bile
Answer: B
Explanation: The large intestine primarily reabsorbs water and forms feces.
Question 22. Which part of the neuron receives incoming signals?
A) Axon
B) Dendrite
C) Synaptic terminal
D) Myelin sheath
Answer: B
Explanation: Dendrites receive chemical and electrical signals from other neurons.
Question 23. What is the functional unit of the kidney responsible for urine formation?
A) Alveolus
B) Nephron
C) Glomerulus
D) Collecting duct
Answer: B
Explanation: The nephron is the fundamental unit that filters blood and forms urine.
Question 24. Which hormone regulates blood glucose by promoting cellular uptake of glucose?
A) Glucagon
B) Thyroxine
C) Insulin
