CAMPBELL BIOLOGY IN FOCUS CHAPTER 43
FINAL PAPER SOLVED QUESTIONS WITH
COMPLETE ANSWERS
◉ Transmembrane proteins.
Answer: Proteins that span the membrane
◉ Peripheral proteins.
Answer: Proteins not embedded in the lipid bilayer; loosely bound to
the surface of the membrane
◉ What are functions of membrane proteins?.
Answer: Transport, enzymetic activity, signal transduction, cell-cell
recognition, intercellular joining, attachment to the cytoskeleton and
extracellular matrix (ECM)
◉ Glycolipids.
Answer: Membrane carbohydrates that are covalently bonded to
lipids
◉ Glycoproteins.
, Answer: Membrane carbohydrates that are covalently bonded to
proteins
◉ How permeable is the plasma membrane?.
Answer: Small nonpolar molecules cross easily; polar molecules
don't.
◉ Transport proteins.
Answer: Transmembrane protein that helps a certain substance or
class of closely related substances to cross the membrane
◉ Channel proteins.
Answer: Proteins that provide corridors that allow a specific
molecule or ion to cross the membrane
◉ Aquaporins.
Answer: Water channel proteins
◉ Carrier proteins.
Answer: Proteins that bind to molecules and change shape to shuttle
them across the membrane
◉ Diffusion.
FINAL PAPER SOLVED QUESTIONS WITH
COMPLETE ANSWERS
◉ Transmembrane proteins.
Answer: Proteins that span the membrane
◉ Peripheral proteins.
Answer: Proteins not embedded in the lipid bilayer; loosely bound to
the surface of the membrane
◉ What are functions of membrane proteins?.
Answer: Transport, enzymetic activity, signal transduction, cell-cell
recognition, intercellular joining, attachment to the cytoskeleton and
extracellular matrix (ECM)
◉ Glycolipids.
Answer: Membrane carbohydrates that are covalently bonded to
lipids
◉ Glycoproteins.
, Answer: Membrane carbohydrates that are covalently bonded to
proteins
◉ How permeable is the plasma membrane?.
Answer: Small nonpolar molecules cross easily; polar molecules
don't.
◉ Transport proteins.
Answer: Transmembrane protein that helps a certain substance or
class of closely related substances to cross the membrane
◉ Channel proteins.
Answer: Proteins that provide corridors that allow a specific
molecule or ion to cross the membrane
◉ Aquaporins.
Answer: Water channel proteins
◉ Carrier proteins.
Answer: Proteins that bind to molecules and change shape to shuttle
them across the membrane
◉ Diffusion.
