BIO 172 EXAM 2 WITH 100%
CORRECT ANSWERS 2026
Definition, types of passive transport correct answer transport
with no outside energy source; simple and facilitated diffusion
Simple Diffusion correct answer type of passive transport in
which small, nonpolar molecules move through the plasma
membrane down a concentration gradient
facilitated diffusion correct answer type of passive transport in
which molecules move down a concentration gradient via a
protein
Definition, types of active transport correct answer transport
using an outside energy source; primary and secondary active
transport
primary active transport correct answer active transport in
which ATP is used to move molecules against their concentration
gradient
secondary active transport correct answer active transport in
which an electrochemical gradient is used to move molecules
against their concentration gradient
,aquaporins correct answer integral membrane proteins which
facilitate the diffusion of water
definition, types of transport proteins correct answer transport
proteins form pores that allow for facilitated diffusion; uniport,
symport, antiport
uniport correct answer type of transport protein that moves
one molecule in one direction across a membrane
symport correct answer transport protein that moves two
molecules in one direction across a membrane simultaneously
antiport correct answer transport protein that moves two
molecules in opposite directions across a membrane
simultaneously
structures in prokaryotes correct answer cell membrane, cell
wall, nucleoid, plasmid, flagellum, cytoskeleton, pilus, FtsZ
cell wall correct answer prokaryotes: made of peptidoglycan
(beta 1-4 glycosidic linkages), chains of peptidoglycan are linked
by peptide bonds
nucleoid correct answer prokaryotes; protein bound mass of
supercoiled DNA
plasmid correct answer prokaryotes; small circular DNA
molecules
, flagellum correct answer prokaryotes; propellor
cytoskeleton correct answer prokaryotes: MreB (actin-like
filament_ helps maintain cell shape
eukaryotes: composed of microtubules, microfilaments, and
intermediate filaments
pilus correct answer prokaryotes; genetic transfer connection
between cells
FtsZ correct answer prokaryotes; protein that forms ring in
center of cell and constricts to cause binary fission
endomembrane system correct answer eukaryotes; composed
of nucleus, rough ER, smooth ER, lysosomes, and golgi apparatus
nucleus correct answer eukaryotes; part of endomembrane
system; large and organized, surrounded by nuclear envelope
with nuclear pores, nucleolus, info storage/processing
nucleolus correct answer eukaryotes; in nucleus, part of
endomembrane system, region for ribosome assembly
Rough ER correct answer eukaryotes; part of endomembrane
system; maze of outfoldings of nuclear membranes; contains
ribosomes: modifies proteins and transports them
CORRECT ANSWERS 2026
Definition, types of passive transport correct answer transport
with no outside energy source; simple and facilitated diffusion
Simple Diffusion correct answer type of passive transport in
which small, nonpolar molecules move through the plasma
membrane down a concentration gradient
facilitated diffusion correct answer type of passive transport in
which molecules move down a concentration gradient via a
protein
Definition, types of active transport correct answer transport
using an outside energy source; primary and secondary active
transport
primary active transport correct answer active transport in
which ATP is used to move molecules against their concentration
gradient
secondary active transport correct answer active transport in
which an electrochemical gradient is used to move molecules
against their concentration gradient
,aquaporins correct answer integral membrane proteins which
facilitate the diffusion of water
definition, types of transport proteins correct answer transport
proteins form pores that allow for facilitated diffusion; uniport,
symport, antiport
uniport correct answer type of transport protein that moves
one molecule in one direction across a membrane
symport correct answer transport protein that moves two
molecules in one direction across a membrane simultaneously
antiport correct answer transport protein that moves two
molecules in opposite directions across a membrane
simultaneously
structures in prokaryotes correct answer cell membrane, cell
wall, nucleoid, plasmid, flagellum, cytoskeleton, pilus, FtsZ
cell wall correct answer prokaryotes: made of peptidoglycan
(beta 1-4 glycosidic linkages), chains of peptidoglycan are linked
by peptide bonds
nucleoid correct answer prokaryotes; protein bound mass of
supercoiled DNA
plasmid correct answer prokaryotes; small circular DNA
molecules
, flagellum correct answer prokaryotes; propellor
cytoskeleton correct answer prokaryotes: MreB (actin-like
filament_ helps maintain cell shape
eukaryotes: composed of microtubules, microfilaments, and
intermediate filaments
pilus correct answer prokaryotes; genetic transfer connection
between cells
FtsZ correct answer prokaryotes; protein that forms ring in
center of cell and constricts to cause binary fission
endomembrane system correct answer eukaryotes; composed
of nucleus, rough ER, smooth ER, lysosomes, and golgi apparatus
nucleus correct answer eukaryotes; part of endomembrane
system; large and organized, surrounded by nuclear envelope
with nuclear pores, nucleolus, info storage/processing
nucleolus correct answer eukaryotes; in nucleus, part of
endomembrane system, region for ribosome assembly
Rough ER correct answer eukaryotes; part of endomembrane
system; maze of outfoldings of nuclear membranes; contains
ribosomes: modifies proteins and transports them
