Bio 1201 exam 2 gregg EXAM STUDY
GUIDE 2026/2027 COMPLETE QUESTIONS
WITH VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS <NEWEST
VERSION>
transport proteins - ANSWER are responsible for controlling passage across the
membrane
fluid mosaic model - ANSWER The membrane is a mosaic of protein molecules
bobbing in a fluid bilayer of phospholipids
fatty acid tails - ANSWER nonpolar, hydrophobic
fatty acid heads - ANSWER hydrophilic, polar
periphial proteins - ANSWER bound to the surface of the membrane
integral proteins - ANSWER penetrate the hydrophobic core (ones that span the
membrane are transmembrane protiens
How do cells recognize each other? - ANSWER by binding to molecules, often
containing carbohydrates, on the extracellular surface of the plasma membrane
Glycolipids - ANSWER Membrane carbohydrates that are covalently bonded to
lipids.
, Hypdrophobic - ANSWER molecules such as hydrocarbons that can dissolve in
the lipid bilayer and pass through the membrane rapidly
Hydrophilic - ANSWER molecules that don't cross the membrane easily (ions and
polar molecules)
transport proteins - ANSWER allow passage of hydrophilic substances across the
membrane
carrier proteins - ANSWER bind to molecules and change shape to shuttle them
across the membrane
Plasma membrane - ANSWER A selectively-permeable phospholipid bilayer
forming the boundary of the cells. Hydrophilic heads and hydrophobic tails
peripheral proteins - ANSWER Bound to the surface of the membrane
Integral proteins - ANSWER penetrate the hydrophobic core
Transport proteins - ANSWER Span membrane. Allow passage of hydrophilic
substances
functions of plasma membrane - ANSWER transport, enzymatic activity, signal
transduction, cell-cell recognition, intercellular joining, attachment to cytoskeleton
and ECM. Remember that carbs in cell= cell recognition
Permeability - ANSWER The easiest= small, non polar. Hardest= large ions
,Hydrophobic (non polar) - ANSWER Dissolve in lipid bilayer and pass through
membrane
Hydrophilic (ions/ polar) - ANSWER Do not cross easily
passive transport - ANSWER Diffusion of a substance with no energy used. Uses
carrier protein. For polar and hydrophobic
Diffusion - ANSWER Tendency for molecules to spread out into available space
Osmosis - ANSWER diffusion of water across a selectively permeable membrane
How does water diffuse - ANSWER Area of low to high until equal
Hypotonic (we always refer to environment) - ANSWER Water rushes inside (cell
bursts) normal in plant cells
hypertonic - ANSWER Solution leaves cell (cell shrivels)
Isotonic - ANSWER Solution is equal!
facilitated diffusion - ANSWER Passive transport with help by proteins
Ion channels- facilitate transport ions
Gated channels- open/ close
active transport - ANSWER Moves against gradient. Needs ATP (energy). Uses
integral and transport proteins. For ionic and large
, cotransport - ANSWER Transport with a membrane protein
Cytoplasm has a HIGH concentration of K+ ions, how can they keep entering? -
ANSWER Energy and active transport. Bulk transport occurs by extocytosis and
endocytosis
How do small vs large molecules enter bilayer? - ANSWER Small/ water- enter
and leave through bilayer or by transport proteins
Large- cross by vesticles
Phagocytosis - ANSWER Cell uses its plasma membrane to engulf a large
particle. (Think a= ate)
Pinocytosis - ANSWER Cell drinking
receptor-mediated endocytosis - ANSWER Imports macromolecules
*ch 7 quiz: between 2 solutions: which one will decrease in volume? - ANSWER
One with lower amount
*ch 7 quiz: function of cholesterol? - ANSWER Stabilize phoslipids (orange
molecules on tails)
*ch 7 quiz: where is glycoprotein? - ANSWER On top of structure, made of carbs
and a protein
*ch 7 quiz: is osmosis a type of diffusion? - ANSWER Yes! Just for water
GUIDE 2026/2027 COMPLETE QUESTIONS
WITH VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS <NEWEST
VERSION>
transport proteins - ANSWER are responsible for controlling passage across the
membrane
fluid mosaic model - ANSWER The membrane is a mosaic of protein molecules
bobbing in a fluid bilayer of phospholipids
fatty acid tails - ANSWER nonpolar, hydrophobic
fatty acid heads - ANSWER hydrophilic, polar
periphial proteins - ANSWER bound to the surface of the membrane
integral proteins - ANSWER penetrate the hydrophobic core (ones that span the
membrane are transmembrane protiens
How do cells recognize each other? - ANSWER by binding to molecules, often
containing carbohydrates, on the extracellular surface of the plasma membrane
Glycolipids - ANSWER Membrane carbohydrates that are covalently bonded to
lipids.
, Hypdrophobic - ANSWER molecules such as hydrocarbons that can dissolve in
the lipid bilayer and pass through the membrane rapidly
Hydrophilic - ANSWER molecules that don't cross the membrane easily (ions and
polar molecules)
transport proteins - ANSWER allow passage of hydrophilic substances across the
membrane
carrier proteins - ANSWER bind to molecules and change shape to shuttle them
across the membrane
Plasma membrane - ANSWER A selectively-permeable phospholipid bilayer
forming the boundary of the cells. Hydrophilic heads and hydrophobic tails
peripheral proteins - ANSWER Bound to the surface of the membrane
Integral proteins - ANSWER penetrate the hydrophobic core
Transport proteins - ANSWER Span membrane. Allow passage of hydrophilic
substances
functions of plasma membrane - ANSWER transport, enzymatic activity, signal
transduction, cell-cell recognition, intercellular joining, attachment to cytoskeleton
and ECM. Remember that carbs in cell= cell recognition
Permeability - ANSWER The easiest= small, non polar. Hardest= large ions
,Hydrophobic (non polar) - ANSWER Dissolve in lipid bilayer and pass through
membrane
Hydrophilic (ions/ polar) - ANSWER Do not cross easily
passive transport - ANSWER Diffusion of a substance with no energy used. Uses
carrier protein. For polar and hydrophobic
Diffusion - ANSWER Tendency for molecules to spread out into available space
Osmosis - ANSWER diffusion of water across a selectively permeable membrane
How does water diffuse - ANSWER Area of low to high until equal
Hypotonic (we always refer to environment) - ANSWER Water rushes inside (cell
bursts) normal in plant cells
hypertonic - ANSWER Solution leaves cell (cell shrivels)
Isotonic - ANSWER Solution is equal!
facilitated diffusion - ANSWER Passive transport with help by proteins
Ion channels- facilitate transport ions
Gated channels- open/ close
active transport - ANSWER Moves against gradient. Needs ATP (energy). Uses
integral and transport proteins. For ionic and large
, cotransport - ANSWER Transport with a membrane protein
Cytoplasm has a HIGH concentration of K+ ions, how can they keep entering? -
ANSWER Energy and active transport. Bulk transport occurs by extocytosis and
endocytosis
How do small vs large molecules enter bilayer? - ANSWER Small/ water- enter
and leave through bilayer or by transport proteins
Large- cross by vesticles
Phagocytosis - ANSWER Cell uses its plasma membrane to engulf a large
particle. (Think a= ate)
Pinocytosis - ANSWER Cell drinking
receptor-mediated endocytosis - ANSWER Imports macromolecules
*ch 7 quiz: between 2 solutions: which one will decrease in volume? - ANSWER
One with lower amount
*ch 7 quiz: function of cholesterol? - ANSWER Stabilize phoslipids (orange
molecules on tails)
*ch 7 quiz: where is glycoprotein? - ANSWER On top of structure, made of carbs
and a protein
*ch 7 quiz: is osmosis a type of diffusion? - ANSWER Yes! Just for water
