ATI TEAS 7 ENTRANCE EXAM– QUESTIONS AND ANSWERS |
VERIFIED AND WELL DETAILED ANSWERS PLUS RATIONALES |
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1. Which of the following anatomical terms describes the position of the sternum relative to
the heart?
A. Posterior
B. Anterior
C. Lateral
D. Superior
The sternum is located in front of the heart, making its correct anatomical position anterior.
Posterior means toward the back, lateral means toward the side, and superior means above.
2. Which of the following blood cells are primarily responsible for transporting oxygen
throughout the human body?
A. Leukocytes
B. Thrombocytes
C. Erythrocytes
D. Plasma cells
Erythrocytes, or red blood cells, contain hemoglobin, which binds to oxygen in the lungs and
delivers it to body tissues. Leukocytes fight infection, thrombocytes handle clotting, and
plasma serves as the liquid matrix of blood.
3. What is the primary function of the ribosome within a living cell?
A. Lipid synthesis
B. Protein synthesis
C. ATP production via cellular respiration
D. Intracellular waste degradation
, Ribosomes are cellular structures responsible for translating messenger RNA into polypeptide
chains, effectively building proteins. Lipids are synthesized in the endoplasmic reticulum, and
ATP is produced in mitochondria.
4. Which type of chemical bond involves the complete transfer of valence electrons from
one atom to another, resulting in oppositely charged ions?
A. Covalent bond
B. Hydrogen bond
C. Ionic bond
D. Peptide bond
An ionic bond is formed when electrons are transferred between atoms, creating positive and
negative ions that attract each other. Covalent bonds involve shared electrons, and hydrogen
bonds are weak intermolecular attractions.
5. During which phase of mitosis do duplicated chromosomes condense, the nuclear
envelope break down, and the mitotic spindle begin to form?
A. Anaphase
B. Metaphase
C. Telophase
D. Prophase
Prophase is the initial stage of mitosis where chromatin condenses into visible chromosomes,
the nuclear membrane dissolves, and spindle fibers start forming. Metaphase involves
chromosome alignment, anaphase involves chromatid separation, and telophase marks
nuclear envelope reformation.
6. Which valve of the human heart prevents backflow of blood from the right ventricle into
the right atrium?
A. Aortic valve
B. Mitral valve
C. Tricuspid valve
D. Pulmonary valve
, The tricuspid valve separates the right atrium from the right ventricle, preventing backflow
during ventricular contraction. The mitral valve guards the left AV junction, while the aortic
and pulmonary valves regulate arterial outflow.
7. Which macromolecule class includes enzymes, antibodies, and structural components
such as collagen?
A. Carbohydrates
B. Lipids
C. Nucleic acids
D. Proteins
Proteins are complex polymers made of amino acids that serve structural, enzymatic, and
immunological roles. Carbohydrates provide energy, lipids store energy and form membranes,
and nucleic acids store genetic information.
8. What is the primary site of nutrient absorption in the human gastrointestinal tract?
A. Stomach
B. Small intestine
C. Large intestine
D. Esophagus
The small intestine, specifically the jejunum and ileum, features villi and microvilli that
maximize surface area for the absorption of digested nutrients into the bloodstream. The large
intestine primarily absorbs water and electrolytes.
9. Which of the following structures in the human respiratory system is commonly known
as the windpipe?
A. Larynx
B. Pharynx
C. Trachea
D. Bronchus
The trachea is a cartilaginous tube that connects the larynx to the primary bronchi, serving as
the main passageway for air entering and leaving the lungs. The pharynx is the throat, and
the larynx houses the vocal cords.
VERIFIED AND WELL DETAILED ANSWERS PLUS RATIONALES |
GUARANTEED PASS | LATEST EXAM UPDATE | EXAM PREP |
STUDY GUIDE | PRACTICE TEST| DOWNLOAD INSTANT PDF
1. Which of the following anatomical terms describes the position of the sternum relative to
the heart?
A. Posterior
B. Anterior
C. Lateral
D. Superior
The sternum is located in front of the heart, making its correct anatomical position anterior.
Posterior means toward the back, lateral means toward the side, and superior means above.
2. Which of the following blood cells are primarily responsible for transporting oxygen
throughout the human body?
A. Leukocytes
B. Thrombocytes
C. Erythrocytes
D. Plasma cells
Erythrocytes, or red blood cells, contain hemoglobin, which binds to oxygen in the lungs and
delivers it to body tissues. Leukocytes fight infection, thrombocytes handle clotting, and
plasma serves as the liquid matrix of blood.
3. What is the primary function of the ribosome within a living cell?
A. Lipid synthesis
B. Protein synthesis
C. ATP production via cellular respiration
D. Intracellular waste degradation
, Ribosomes are cellular structures responsible for translating messenger RNA into polypeptide
chains, effectively building proteins. Lipids are synthesized in the endoplasmic reticulum, and
ATP is produced in mitochondria.
4. Which type of chemical bond involves the complete transfer of valence electrons from
one atom to another, resulting in oppositely charged ions?
A. Covalent bond
B. Hydrogen bond
C. Ionic bond
D. Peptide bond
An ionic bond is formed when electrons are transferred between atoms, creating positive and
negative ions that attract each other. Covalent bonds involve shared electrons, and hydrogen
bonds are weak intermolecular attractions.
5. During which phase of mitosis do duplicated chromosomes condense, the nuclear
envelope break down, and the mitotic spindle begin to form?
A. Anaphase
B. Metaphase
C. Telophase
D. Prophase
Prophase is the initial stage of mitosis where chromatin condenses into visible chromosomes,
the nuclear membrane dissolves, and spindle fibers start forming. Metaphase involves
chromosome alignment, anaphase involves chromatid separation, and telophase marks
nuclear envelope reformation.
6. Which valve of the human heart prevents backflow of blood from the right ventricle into
the right atrium?
A. Aortic valve
B. Mitral valve
C. Tricuspid valve
D. Pulmonary valve
, The tricuspid valve separates the right atrium from the right ventricle, preventing backflow
during ventricular contraction. The mitral valve guards the left AV junction, while the aortic
and pulmonary valves regulate arterial outflow.
7. Which macromolecule class includes enzymes, antibodies, and structural components
such as collagen?
A. Carbohydrates
B. Lipids
C. Nucleic acids
D. Proteins
Proteins are complex polymers made of amino acids that serve structural, enzymatic, and
immunological roles. Carbohydrates provide energy, lipids store energy and form membranes,
and nucleic acids store genetic information.
8. What is the primary site of nutrient absorption in the human gastrointestinal tract?
A. Stomach
B. Small intestine
C. Large intestine
D. Esophagus
The small intestine, specifically the jejunum and ileum, features villi and microvilli that
maximize surface area for the absorption of digested nutrients into the bloodstream. The large
intestine primarily absorbs water and electrolytes.
9. Which of the following structures in the human respiratory system is commonly known
as the windpipe?
A. Larynx
B. Pharynx
C. Trachea
D. Bronchus
The trachea is a cartilaginous tube that connects the larynx to the primary bronchi, serving as
the main passageway for air entering and leaving the lungs. The pharynx is the throat, and
the larynx houses the vocal cords.
