BIO 1201 GREGG EXAM 2 2026 ECOLOGY
AND EVOLUTION REVIEW QUESTIONS
ANSWERS VERIFIED GUIDE
◉ 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
AND EVOLUTION REVIEW QUESTIONS
ANSWERS VERIFIED GUIDE
◉ 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
