GCU BIO-201 MIDTERM EXAM STUDY GUIDE QUESTIONS WITH 100%
CORRECT ANSWERS/NEWEST UPDATE!!
Question 1
Which field of study focuses on the abnormalities or disturbances in physiological processes that
lead to disease?
A) Gross Anatomy
B) Systemic Physiology
C) Pathophysiology
D) Histology
E) Cytology
Correct Answer: C) Pathophysiology
Rationale: While anatomy is the study of structure and physiology is the study of function,
pathophysiology specifically examines how those functions are altered during a state of
disease or injury.
Question 2
Place the following levels of structural organization in the correct order from simplest to most
complex:
A) Cellular, Chemical, Tissue, Organ, Organism, System
B) Chemical, Cellular, Tissue, Organ, Organ System, Organism
C) Organism, Organ System, Organ, Tissue, Cellular, Chemical
D) Chemical, Tissue, Cellular, Organ, Organ System, Organism
E) Tissue, Chemical, Cellular, Organ System, Organ, Organism
Correct Answer: B) Chemical, Cellular, Tissue, Organ, Organ System, Organism
Rationale: The hierarchy of life begins at the atomic/molecular (chemical) level, which
forms cells, which aggregate into tissues, then organs, then systems, and finally the
complete organism.
Question 3
In a negative feedback loop, which component is responsible for processing information and
determining the appropriate response?
A) Receptor
B) Effector
C) Integrator (Control Center)
D) Stimulus
E) Variable
Correct Answer: C) Integrator (Control Center)
Rationale: The receptor senses the change; the integrator (usually the brain or an endocrine
gland) processes that data and signals the effector to take action to reverse the deviation.
Question 4
Which of the following is the best example of positive feedback in the human body?
, 2
A) Regulation of blood glucose levels via insulin
B) Control of body temperature through shivering
C) Release of oxytocin to increase uterine contractions during childbirth
D) Maintenance of blood pressure through heart rate adjustments
E) Regulation of blood pH through breathing
Correct Answer: C) Release of oxytocin to increase uterine contractions during childbirth
Rationale: Positive feedback amplifies a stimulus rather than reversing it. During labor,
contractions trigger oxytocin, which causes stronger contractions, continuing until the
"event" (birth) is completed.
Question 5
Water is described as a polar molecule because:
A) It contains ionic bonds between hydrogen and oxygen
B) The oxygen atom has a slight positive charge and the hydrogens have slight negative charges
C) The electrons are shared unequally, giving oxygen a partial negative charge and hydrogens
partial positive charges
D) It has a linear molecular shape
E) It is only found in the polar regions of the Earth
Correct Answer: C) The electrons are shared unequally, giving oxygen a partial negative
charge and hydrogens partial positive charges
Rationale: Oxygen is more electronegative than hydrogen, pulling the shared electrons
closer to itself. This creates a dipole moment and a "bent" shape, making water an
excellent solvent for other polar substances.
Question 6
A subatomic particle that carries a negative charge and orbits the nucleus is called a(n):
A) Proton
B) Neutron
C) Electron
D) Positron
E) Isotope
Correct Answer: C) Electron
Rationale: Protons (positive) and neutrons (neutral) are found in the nucleus, while
electrons (negative) occupy the shells or orbitals surrounding the nucleus.
Question 7
Which type of chemical bond involves the complete transfer of electrons from one atom to
another?
A) Nonpolar covalent bond
B) Polar covalent bond
C) Hydrogen bond
, 3
D) Ionic bond
E) Van der Waals force
Correct Answer: D) Ionic bond
Rationale: Ionic bonds form when one atom "steals" an electron from another (e.g., NaCl),
resulting in oppositely charged ions that are attracted to one another.
Question 8
What is the primary function of an enzyme in a biological system?
A) To provide structural support to the cell membrane
B) To store genetic information
C) To act as a biological catalyst that speeds up reactions by lowering activation energy
D) To serve as a primary source of energy for ATP production
E) To transport oxygen in the blood
Correct Answer: C) To act as a biological catalyst that speeds up reactions by lowering
activation energy
Rationale: Enzymes facilitate chemical reactions that would otherwise happen too slowly to
sustain life, without being consumed in the process.
Question 9
How are carbohydrates primarily stored in the human body for later use?
A) As starch in the liver
B) As triglycerides in adipose tissue
C) As glycogen in the liver and skeletal muscles
D) As cellulose in the large intestine
E) As glucose in the interstitial fluid
Correct Answer: C) As glycogen in the liver and skeletal muscles
Rationale: Glycogen is a highly branched polysaccharide used by animals to store glucose.
When blood sugar drops, the liver breaks down glycogen to maintain homeostasis.
Question 10
A molecule consisting of two monosaccharides joined together (such as sucrose) is classified as
a:
A) Polysaccharide
B) Disaccharide
C) Triglyceride
D) Oligopeptide
E) Nucleotide
Correct Answer: B) Disaccharide
Rationale: "Di-" means two. Monosaccharides are single sugars, and polysaccharides are
long chains of many sugars.
CORRECT ANSWERS/NEWEST UPDATE!!
Question 1
Which field of study focuses on the abnormalities or disturbances in physiological processes that
lead to disease?
A) Gross Anatomy
B) Systemic Physiology
C) Pathophysiology
D) Histology
E) Cytology
Correct Answer: C) Pathophysiology
Rationale: While anatomy is the study of structure and physiology is the study of function,
pathophysiology specifically examines how those functions are altered during a state of
disease or injury.
Question 2
Place the following levels of structural organization in the correct order from simplest to most
complex:
A) Cellular, Chemical, Tissue, Organ, Organism, System
B) Chemical, Cellular, Tissue, Organ, Organ System, Organism
C) Organism, Organ System, Organ, Tissue, Cellular, Chemical
D) Chemical, Tissue, Cellular, Organ, Organ System, Organism
E) Tissue, Chemical, Cellular, Organ System, Organ, Organism
Correct Answer: B) Chemical, Cellular, Tissue, Organ, Organ System, Organism
Rationale: The hierarchy of life begins at the atomic/molecular (chemical) level, which
forms cells, which aggregate into tissues, then organs, then systems, and finally the
complete organism.
Question 3
In a negative feedback loop, which component is responsible for processing information and
determining the appropriate response?
A) Receptor
B) Effector
C) Integrator (Control Center)
D) Stimulus
E) Variable
Correct Answer: C) Integrator (Control Center)
Rationale: The receptor senses the change; the integrator (usually the brain or an endocrine
gland) processes that data and signals the effector to take action to reverse the deviation.
Question 4
Which of the following is the best example of positive feedback in the human body?
, 2
A) Regulation of blood glucose levels via insulin
B) Control of body temperature through shivering
C) Release of oxytocin to increase uterine contractions during childbirth
D) Maintenance of blood pressure through heart rate adjustments
E) Regulation of blood pH through breathing
Correct Answer: C) Release of oxytocin to increase uterine contractions during childbirth
Rationale: Positive feedback amplifies a stimulus rather than reversing it. During labor,
contractions trigger oxytocin, which causes stronger contractions, continuing until the
"event" (birth) is completed.
Question 5
Water is described as a polar molecule because:
A) It contains ionic bonds between hydrogen and oxygen
B) The oxygen atom has a slight positive charge and the hydrogens have slight negative charges
C) The electrons are shared unequally, giving oxygen a partial negative charge and hydrogens
partial positive charges
D) It has a linear molecular shape
E) It is only found in the polar regions of the Earth
Correct Answer: C) The electrons are shared unequally, giving oxygen a partial negative
charge and hydrogens partial positive charges
Rationale: Oxygen is more electronegative than hydrogen, pulling the shared electrons
closer to itself. This creates a dipole moment and a "bent" shape, making water an
excellent solvent for other polar substances.
Question 6
A subatomic particle that carries a negative charge and orbits the nucleus is called a(n):
A) Proton
B) Neutron
C) Electron
D) Positron
E) Isotope
Correct Answer: C) Electron
Rationale: Protons (positive) and neutrons (neutral) are found in the nucleus, while
electrons (negative) occupy the shells or orbitals surrounding the nucleus.
Question 7
Which type of chemical bond involves the complete transfer of electrons from one atom to
another?
A) Nonpolar covalent bond
B) Polar covalent bond
C) Hydrogen bond
, 3
D) Ionic bond
E) Van der Waals force
Correct Answer: D) Ionic bond
Rationale: Ionic bonds form when one atom "steals" an electron from another (e.g., NaCl),
resulting in oppositely charged ions that are attracted to one another.
Question 8
What is the primary function of an enzyme in a biological system?
A) To provide structural support to the cell membrane
B) To store genetic information
C) To act as a biological catalyst that speeds up reactions by lowering activation energy
D) To serve as a primary source of energy for ATP production
E) To transport oxygen in the blood
Correct Answer: C) To act as a biological catalyst that speeds up reactions by lowering
activation energy
Rationale: Enzymes facilitate chemical reactions that would otherwise happen too slowly to
sustain life, without being consumed in the process.
Question 9
How are carbohydrates primarily stored in the human body for later use?
A) As starch in the liver
B) As triglycerides in adipose tissue
C) As glycogen in the liver and skeletal muscles
D) As cellulose in the large intestine
E) As glucose in the interstitial fluid
Correct Answer: C) As glycogen in the liver and skeletal muscles
Rationale: Glycogen is a highly branched polysaccharide used by animals to store glucose.
When blood sugar drops, the liver breaks down glycogen to maintain homeostasis.
Question 10
A molecule consisting of two monosaccharides joined together (such as sucrose) is classified as
a:
A) Polysaccharide
B) Disaccharide
C) Triglyceride
D) Oligopeptide
E) Nucleotide
Correct Answer: B) Disaccharide
Rationale: "Di-" means two. Monosaccharides are single sugars, and polysaccharides are
long chains of many sugars.
