BIO 353 LATEST 2026 TEST PAPER QUESTIONS AND
ANSWERS GRADED A+
✔✔Transmembrane Proteins: - ✔✔can move laterally and cannot flip 180˚ in the
membrane.
✔✔Submembrane cytoskeletons can provide shape to a cell. - ✔✔True
✔✔Integrin receptor binding results in the recruitment of: - ✔✔Actin Filaments
✔✔The presence of 2 disulfide bonds near each other is a good thing when a stretch of
protein is to be immobilized. - ✔✔True
✔✔Beta pleated sheets can provide a unique environment on one side of the sheet
relative to the other side of the sheet because of the types of side groups that can
accumulate there - ✔✔True
✔✔When a lipid goes from a gel state to a liquid-crystal state, the reaction is
___________. - ✔✔endothermic
✔✔How many amino acids are required to span a typical membrane? - ✔✔22-24
✔✔The thickness of the membrane is - ✔✔5 nm
✔✔In a phospholipid, the fatty acid chains are linked to the ___ by ___ bonds. -
✔✔glycerol, ester
✔✔The hydrophilic head group is hydrophilic because it can ___ bond. - ✔✔hydrogen
✔✔An unsaturated site in a phospholipid will cause what is referred to in the fatty acid
chain as a ___. - ✔✔kink
✔✔Transmembrane proteins of alpha helices most frequently span the membrane ___
or ___ times. - ✔✔1, 7
✔✔Peroxisomes likely originated from endosymbiosis. - ✔✔False
✔✔Peroxisomes increased the fitness of the primitive protoprokaryote by removing toxic
oxygen in the ancient earth. - ✔✔True
✔✔From the following, where would a proline residue be least likely to be? - ✔✔in the
membrane
, ✔✔The number of amino acids in an actin monomer is - ✔✔375
✔✔Hydrolysis of ATP to ADP - ✔✔helps identify the assembly vs the disassembly end
✔✔Preassembled nucleaton sites in a living cell are equivalent to the intracellular
preference for actin filaments - ✔✔True
✔✔Intracellular preference for actin filaments - ✔✔is a way to look at the geography of
the cell and show where the role of actin filaments is important.
✔✔The ability of actin filaments to disassemble into small monomers - ✔✔two of the
above
✔✔What causes a myosin II molecule to be able to form a bipolar fiber? - ✔✔Calcium
binding to calmodulin.
✔✔The diameter of the actin filament is ___ nm - ✔✔7
✔✔ Single-celled organisms have a limited number of biomolecular machines within
them. - ✔✔True
✔✔Filopodia contain receptors that sense the environment and ___________. -
✔✔None of the above
✔✔An evolutionary advancement occurred when organisms became multicellular and
acquired a division of labor. - ✔✔True
✔✔Lipids can move freely in the plane of the membrane because they are covalently
linked. - ✔✔False
✔✔"Flip flopping" between the inner leaflet and outer leaflet of the membrane is a
frequent event. - ✔✔False
✔✔The lipid bilayer functions to keep charged particles and fats outside of the cell. -
✔✔False
✔✔Which of the following would not typically be the quantity of carbons in a
phospholipid tail? (Select all that apply.)
a. 10
b. 14
c. 15
d. 26
e. 22
ANSWERS GRADED A+
✔✔Transmembrane Proteins: - ✔✔can move laterally and cannot flip 180˚ in the
membrane.
✔✔Submembrane cytoskeletons can provide shape to a cell. - ✔✔True
✔✔Integrin receptor binding results in the recruitment of: - ✔✔Actin Filaments
✔✔The presence of 2 disulfide bonds near each other is a good thing when a stretch of
protein is to be immobilized. - ✔✔True
✔✔Beta pleated sheets can provide a unique environment on one side of the sheet
relative to the other side of the sheet because of the types of side groups that can
accumulate there - ✔✔True
✔✔When a lipid goes from a gel state to a liquid-crystal state, the reaction is
___________. - ✔✔endothermic
✔✔How many amino acids are required to span a typical membrane? - ✔✔22-24
✔✔The thickness of the membrane is - ✔✔5 nm
✔✔In a phospholipid, the fatty acid chains are linked to the ___ by ___ bonds. -
✔✔glycerol, ester
✔✔The hydrophilic head group is hydrophilic because it can ___ bond. - ✔✔hydrogen
✔✔An unsaturated site in a phospholipid will cause what is referred to in the fatty acid
chain as a ___. - ✔✔kink
✔✔Transmembrane proteins of alpha helices most frequently span the membrane ___
or ___ times. - ✔✔1, 7
✔✔Peroxisomes likely originated from endosymbiosis. - ✔✔False
✔✔Peroxisomes increased the fitness of the primitive protoprokaryote by removing toxic
oxygen in the ancient earth. - ✔✔True
✔✔From the following, where would a proline residue be least likely to be? - ✔✔in the
membrane
, ✔✔The number of amino acids in an actin monomer is - ✔✔375
✔✔Hydrolysis of ATP to ADP - ✔✔helps identify the assembly vs the disassembly end
✔✔Preassembled nucleaton sites in a living cell are equivalent to the intracellular
preference for actin filaments - ✔✔True
✔✔Intracellular preference for actin filaments - ✔✔is a way to look at the geography of
the cell and show where the role of actin filaments is important.
✔✔The ability of actin filaments to disassemble into small monomers - ✔✔two of the
above
✔✔What causes a myosin II molecule to be able to form a bipolar fiber? - ✔✔Calcium
binding to calmodulin.
✔✔The diameter of the actin filament is ___ nm - ✔✔7
✔✔ Single-celled organisms have a limited number of biomolecular machines within
them. - ✔✔True
✔✔Filopodia contain receptors that sense the environment and ___________. -
✔✔None of the above
✔✔An evolutionary advancement occurred when organisms became multicellular and
acquired a division of labor. - ✔✔True
✔✔Lipids can move freely in the plane of the membrane because they are covalently
linked. - ✔✔False
✔✔"Flip flopping" between the inner leaflet and outer leaflet of the membrane is a
frequent event. - ✔✔False
✔✔The lipid bilayer functions to keep charged particles and fats outside of the cell. -
✔✔False
✔✔Which of the following would not typically be the quantity of carbons in a
phospholipid tail? (Select all that apply.)
a. 10
b. 14
c. 15
d. 26
e. 22
