BIO 168 TESTS 2026 PRACTICE TEST
QUESTIONS AND DETAILED A AND P
BREAKDOWN FULL REVIEW
◉ These molecules form the framework of the plasma membrane;
they associate to form two sheets. Answer: phospholipids
◉ To which of the four macromolecules does this molecule belong?
Answer: lipid
◉ What term is used to communicate that the structure is two
sheets? Answer: phospholipid bilayer
◉ What is the name of the portion of the molecule that forms the
inner structure of the plasma membrane? Answer: fatty acid tails
◉ Is the portion of the molecule facing the interstitial fluid or the
cytosol polar or nonpolar? Answer: polar
◉ This molecule is responsible for providing strength to the
membrane and stabilizing it against temperature changes Answer:
cholesterol
,◉ To which of the four macromolecules does this molecule belong?
Answer: lipid
◉ is cholesterol a polar or nonpolar molecule? Answer: nonpolar
◉ Would it be found among the heads of the phospholipid or the
fatty acid tails of the phospholipid? Answer: fatty acid tails
◉ What is the term used to refer to the coating of sugar that is
important for cell-to-cell recognition? Answer: glycocalyx
◉ what 2 molecules make up glycocalyx Answer: glycoproteins
glycolipids
◉ What does the prefix "glyco-" refer to? Answer: sugar
◉ which part of the molecule would be integral in the membrane?
Answer: protein
◉ What is the general term for proteins that are embedded within
and extend all the way across the plasma membrane? Answer:
integral
,◉ What is the general term for proteins that are not embedded, but
are found on the external or internal surface of the plasma
membrane? Answer: peripheral
◉ These proteins catalyze reactions at the external or internal
membrane surface: Answer: enzymes
◉ These proteins are used by the cells in the immune system to
distinguish between self and non-self: Answer: identity markers
◉ These proteins provide a passage for polar and charged molecules
to enter or leave the cell: Answer: channel proteins
◉ These proteins provide a site on the internal surface of the
membrane where microtubules, microfilaments, and intermediate
filaments can attach Answer: anchoring sites
◉ These proteins allow cells to stick together Answer: cell-adhesion
protein
◉ These proteins move molecules into or out of the cell with their
concentration gradients Answer: carrier proteins
, ◉ A general term for the substance that dissolves other substances.
Answer: solvent
◉ Movement of solute out of a cell using a vesicle Answer:
exocytosis
◉ The movement of water across a membrane in order to equalize
solute concentration. Answer: osmosis
◉ A general term for the substance that is dissolved. Answer: solute
◉ Movement of a solute across a membrane in the direction of its
concentration gradient Answer: passive transport
◉ A state in which there is an area of high solute concentration in
one location and low solute concentration in another location.
Answer: concentration gradient
◉ The amount of solute per amount of solvent. Answer:
concentration
◉ When solute concentration is equal on both sides of a
semipermeable membrane Answer: isotonic
QUESTIONS AND DETAILED A AND P
BREAKDOWN FULL REVIEW
◉ These molecules form the framework of the plasma membrane;
they associate to form two sheets. Answer: phospholipids
◉ To which of the four macromolecules does this molecule belong?
Answer: lipid
◉ What term is used to communicate that the structure is two
sheets? Answer: phospholipid bilayer
◉ What is the name of the portion of the molecule that forms the
inner structure of the plasma membrane? Answer: fatty acid tails
◉ Is the portion of the molecule facing the interstitial fluid or the
cytosol polar or nonpolar? Answer: polar
◉ This molecule is responsible for providing strength to the
membrane and stabilizing it against temperature changes Answer:
cholesterol
,◉ To which of the four macromolecules does this molecule belong?
Answer: lipid
◉ is cholesterol a polar or nonpolar molecule? Answer: nonpolar
◉ Would it be found among the heads of the phospholipid or the
fatty acid tails of the phospholipid? Answer: fatty acid tails
◉ What is the term used to refer to the coating of sugar that is
important for cell-to-cell recognition? Answer: glycocalyx
◉ what 2 molecules make up glycocalyx Answer: glycoproteins
glycolipids
◉ What does the prefix "glyco-" refer to? Answer: sugar
◉ which part of the molecule would be integral in the membrane?
Answer: protein
◉ What is the general term for proteins that are embedded within
and extend all the way across the plasma membrane? Answer:
integral
,◉ What is the general term for proteins that are not embedded, but
are found on the external or internal surface of the plasma
membrane? Answer: peripheral
◉ These proteins catalyze reactions at the external or internal
membrane surface: Answer: enzymes
◉ These proteins are used by the cells in the immune system to
distinguish between self and non-self: Answer: identity markers
◉ These proteins provide a passage for polar and charged molecules
to enter or leave the cell: Answer: channel proteins
◉ These proteins provide a site on the internal surface of the
membrane where microtubules, microfilaments, and intermediate
filaments can attach Answer: anchoring sites
◉ These proteins allow cells to stick together Answer: cell-adhesion
protein
◉ These proteins move molecules into or out of the cell with their
concentration gradients Answer: carrier proteins
, ◉ A general term for the substance that dissolves other substances.
Answer: solvent
◉ Movement of solute out of a cell using a vesicle Answer:
exocytosis
◉ The movement of water across a membrane in order to equalize
solute concentration. Answer: osmosis
◉ A general term for the substance that is dissolved. Answer: solute
◉ Movement of a solute across a membrane in the direction of its
concentration gradient Answer: passive transport
◉ A state in which there is an area of high solute concentration in
one location and low solute concentration in another location.
Answer: concentration gradient
◉ The amount of solute per amount of solvent. Answer:
concentration
◉ When solute concentration is equal on both sides of a
semipermeable membrane Answer: isotonic
