ATI TEAS 7 SCIENCE ACTUAL QUESTIONS
AND CORRECT ANSWERS
1. The largest chamber of the heart is the:
a) right ventricle
b) left ventricle (Correct)
c) right atrium
d) left atrium
Explanation: The left ventricle has the thickest muscular wall and pumps
blood throughout the entire body, making it the largest chamber.
2. A tendency of the body to maintain a balanced internal state is
called:
a) metabolism
b) homeostasis (Correct)
c) osmosis
d) differentiation
Explanation: Homeostasis is the process by which the body maintains
stable internal conditions.
3. The three types of proteins are:
a) globular, fibrous, membrane
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, b) globular, fibrous, membrane (Correct)
c) structural, transport, enzymatic
d) amino acid-based, carbohydrate-based, lipid-based
Explanation: Proteins are classified into globular (functional), fibrous
(structural), and membrane proteins based on their structure and function
4. Adipocytes are seen in adipose and fat tissue. They store
a) fat and lipids (Correct)
b) glycogen
c) protein
d) water
They store energy in the form of fat and lipids, and mobilize energy in
response to stress.
5. Ribosomes synthesize:
a) lipids
b) carbohydrates
c) proteins (Correct)
d) nucleic acids
Explanation: Ribosomes are the sites of protein synthesis.
6. In a chemical change, a substance is produced. Examples
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,include:
a) melting ice
b) crushing a can
c) boiling water
d) burning wood (Correct)
Explanation: Burning wood is a chemical change because new substance
are formed.
7. In a physical change, the material involved is structurally the:
a) different
b) same (Correct)
c) dissolved
d) altered chemically
Explanation: Physical changes do not alter the chemical composition of
the material.
8. In an ionic bond, valence electrons are:
a) shared
b) transferred (Correct)
c) shared equally
d) lost and gained without transfer
Explanation: Ionic bonds form through the transfer of electrons from one
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,atom to another.
9. The uterus has how many layers of tissue?
a) 1
b) 2
c) 3 (Correct)
d) 4
Explanation: The uterus has three layers: endometrium, myometrium, an
perimetrium.
10. Which parts of the body produce melanin?
a) hair and iris only
b) skin, hair, and iris (Correct)
c) skin only
d) nails and skin
Explanation: Melanin is produced in melanocytes located in the skin, hair
follicles, and iris.
11. Purine bases include:
a) T, C
b) A, G (Correct)
c) U, C
d) T, U
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AND CORRECT ANSWERS
1. The largest chamber of the heart is the:
a) right ventricle
b) left ventricle (Correct)
c) right atrium
d) left atrium
Explanation: The left ventricle has the thickest muscular wall and pumps
blood throughout the entire body, making it the largest chamber.
2. A tendency of the body to maintain a balanced internal state is
called:
a) metabolism
b) homeostasis (Correct)
c) osmosis
d) differentiation
Explanation: Homeostasis is the process by which the body maintains
stable internal conditions.
3. The three types of proteins are:
a) globular, fibrous, membrane
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49
, b) globular, fibrous, membrane (Correct)
c) structural, transport, enzymatic
d) amino acid-based, carbohydrate-based, lipid-based
Explanation: Proteins are classified into globular (functional), fibrous
(structural), and membrane proteins based on their structure and function
4. Adipocytes are seen in adipose and fat tissue. They store
a) fat and lipids (Correct)
b) glycogen
c) protein
d) water
They store energy in the form of fat and lipids, and mobilize energy in
response to stress.
5. Ribosomes synthesize:
a) lipids
b) carbohydrates
c) proteins (Correct)
d) nucleic acids
Explanation: Ribosomes are the sites of protein synthesis.
6. In a chemical change, a substance is produced. Examples
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49
,include:
a) melting ice
b) crushing a can
c) boiling water
d) burning wood (Correct)
Explanation: Burning wood is a chemical change because new substance
are formed.
7. In a physical change, the material involved is structurally the:
a) different
b) same (Correct)
c) dissolved
d) altered chemically
Explanation: Physical changes do not alter the chemical composition of
the material.
8. In an ionic bond, valence electrons are:
a) shared
b) transferred (Correct)
c) shared equally
d) lost and gained without transfer
Explanation: Ionic bonds form through the transfer of electrons from one
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49
,atom to another.
9. The uterus has how many layers of tissue?
a) 1
b) 2
c) 3 (Correct)
d) 4
Explanation: The uterus has three layers: endometrium, myometrium, an
perimetrium.
10. Which parts of the body produce melanin?
a) hair and iris only
b) skin, hair, and iris (Correct)
c) skin only
d) nails and skin
Explanation: Melanin is produced in melanocytes located in the skin, hair
follicles, and iris.
11. Purine bases include:
a) T, C
b) A, G (Correct)
c) U, C
d) T, U
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