BIO-322 Test 1 MC Questions With Complete Solutions
______________________ tissue serves to cover and protect,
compartmentalize, and regulate exchange between the external
environment and the body. Correct Answers epithelial
"Down-regulation" refers to increased
______________________________ Correct Answers
programmed removal of proteins
A gland that secretes into the lumen of the digestive system is
considered an exocrine gland rather than an endocrine gland
because
____________________________________________________
_________________________________ Correct Answers the
lumen of the digestive gland is essentially an extension of the
external environment
A glucose molecule entering the body in ingested orange juice
will go through what order of fluid compartments as it gets
absorbed through the intestinal epithelium? Correct Answers
intracellular --> interstitial --> plasma
A large Kd for a binding protein and its ligand means that the
protein has _________________________________ Correct
Answers low affinity for the ligand
A ligand binding a receptor can often generate a large number of
second messenger molecules inside the cell. This is called
_____________________ Correct Answers signal
amplification
,A ligand is a chemical signal that: Correct Answers obeys
general rules of specificity, affinity, competition, and saturation,
may elicit different responses in different target cells or after
binding with different receptor types
A polypeptide chain is placed in an aqueous solution and
spontaneously undergoes a conformational change to a 3D
shape. Which of the following bond(s) is/are most likely NOT
playing a role in the process? Correct Answers covalent bonds
A protein placed in a solution becomes unraveled, loses its
native conformation, and is rendered biologically inactive.
Which of the following is/are true? Correct Answers protein
has been denatured, excess hydrogen ions in the solution
disrupted hydrogen bonding
A solution with pH 8 has a H+ concentration that is
_______________ a solution with pH 9. Correct Answers 10
times higher than
A tissue placed in a NaCl solution gained water at equilibrium.
This indicates that the solution was ____________________ to
the tissue Correct Answers hypotonic
An element has an atomic number of 8. This tells us: the number
of protons in the nucleus is ______, the number of total
electrons outside the nucleus is _______, and the number of
electrons in the outermost (valence) shell is ________. Correct
Answers 8,8,6
, An enzyme that catalyzes the breakdown of glycogen into
glucose monomers might be named __________________
Correct Answers glycogenase
An increase in receptor number on the surface of a cell
membrane ____________________________________ Correct
Answers makes the cell more sensitive to the signal molecules
Carbon has an atomic mass of 12 g/mol and an atomic number
of 6. This indicates that carbon forms _____ covalent bonds.
Correct Answers 4
Cell membranes are composed primarily of which two
biomolecules? Correct Answers lipids and proteins
Cells that die due to physical trauma will swell, their organelles
will deteriorate, and they will ultimately rupture in a process
called _________________ Correct Answers necrosis
Cells use glucose metabolism to obtain energy for cellular
processes. Glucose enters cells by
______________________________ Correct Answers active
transport when extracellular glucose concentration is lower than
intracellular concentration
Cofactors: Correct Answers are ions or small functional
groups, are required for an active binding site
During the absorptive state in a person at rest,
______________________________ Correct Answers the
liver forms glycogen
______________________ tissue serves to cover and protect,
compartmentalize, and regulate exchange between the external
environment and the body. Correct Answers epithelial
"Down-regulation" refers to increased
______________________________ Correct Answers
programmed removal of proteins
A gland that secretes into the lumen of the digestive system is
considered an exocrine gland rather than an endocrine gland
because
____________________________________________________
_________________________________ Correct Answers the
lumen of the digestive gland is essentially an extension of the
external environment
A glucose molecule entering the body in ingested orange juice
will go through what order of fluid compartments as it gets
absorbed through the intestinal epithelium? Correct Answers
intracellular --> interstitial --> plasma
A large Kd for a binding protein and its ligand means that the
protein has _________________________________ Correct
Answers low affinity for the ligand
A ligand binding a receptor can often generate a large number of
second messenger molecules inside the cell. This is called
_____________________ Correct Answers signal
amplification
,A ligand is a chemical signal that: Correct Answers obeys
general rules of specificity, affinity, competition, and saturation,
may elicit different responses in different target cells or after
binding with different receptor types
A polypeptide chain is placed in an aqueous solution and
spontaneously undergoes a conformational change to a 3D
shape. Which of the following bond(s) is/are most likely NOT
playing a role in the process? Correct Answers covalent bonds
A protein placed in a solution becomes unraveled, loses its
native conformation, and is rendered biologically inactive.
Which of the following is/are true? Correct Answers protein
has been denatured, excess hydrogen ions in the solution
disrupted hydrogen bonding
A solution with pH 8 has a H+ concentration that is
_______________ a solution with pH 9. Correct Answers 10
times higher than
A tissue placed in a NaCl solution gained water at equilibrium.
This indicates that the solution was ____________________ to
the tissue Correct Answers hypotonic
An element has an atomic number of 8. This tells us: the number
of protons in the nucleus is ______, the number of total
electrons outside the nucleus is _______, and the number of
electrons in the outermost (valence) shell is ________. Correct
Answers 8,8,6
, An enzyme that catalyzes the breakdown of glycogen into
glucose monomers might be named __________________
Correct Answers glycogenase
An increase in receptor number on the surface of a cell
membrane ____________________________________ Correct
Answers makes the cell more sensitive to the signal molecules
Carbon has an atomic mass of 12 g/mol and an atomic number
of 6. This indicates that carbon forms _____ covalent bonds.
Correct Answers 4
Cell membranes are composed primarily of which two
biomolecules? Correct Answers lipids and proteins
Cells that die due to physical trauma will swell, their organelles
will deteriorate, and they will ultimately rupture in a process
called _________________ Correct Answers necrosis
Cells use glucose metabolism to obtain energy for cellular
processes. Glucose enters cells by
______________________________ Correct Answers active
transport when extracellular glucose concentration is lower than
intracellular concentration
Cofactors: Correct Answers are ions or small functional
groups, are required for an active binding site
During the absorptive state in a person at rest,
______________________________ Correct Answers the
liver forms glycogen
