BIOL 189 UNLV TEST BANK 2026
QUESTIONS ANSWERS GRADED A+
⩥cotransport?
Answer: The coupling of the "downhill" diffusion of one substance to
the "uphill" transport of another against its own concentration gradient.
⩥What pump creates the electrochemical gradient?
Answer: electrogenic pump
⩥Tonicity?
Answer: the ability of a solution to cause a cell to gain or lose water
⩥Three types of tonicity?
Answer: isotonic, hypertonic, hypotonic
⩥What do you call the water transport protein?
Answer: Aquaporins
⩥Why does diffusion occur?
Answer: entropy; the second law of thermodynamics
, ⩥active vs passive transport
Answer: active transport requires energy and work, passive transport
does not.
⩥How would you get an H+ back into the matrix?
Answer: ATP Synthase allows the H+ to come back in.
⩥cell-cell recognition
Answer: the function of glyco-proteins attaching to the cell
⩥What helps to stabilize the membrane?
Answer: cholesterol
⩥membrane proteins?
Answer: integral, peripheral, transmembrane
⩥Where are enzymes embedded?
Answer: mitochondria (in the inner membrane)
⩥Selective Permeability: who can pass easily and who cannot?
Answer: nonpolar and small (ie. CO2, O2, hydrocarbons) atoms can pass
easily while polar, large, and charged atoms cannot.
QUESTIONS ANSWERS GRADED A+
⩥cotransport?
Answer: The coupling of the "downhill" diffusion of one substance to
the "uphill" transport of another against its own concentration gradient.
⩥What pump creates the electrochemical gradient?
Answer: electrogenic pump
⩥Tonicity?
Answer: the ability of a solution to cause a cell to gain or lose water
⩥Three types of tonicity?
Answer: isotonic, hypertonic, hypotonic
⩥What do you call the water transport protein?
Answer: Aquaporins
⩥Why does diffusion occur?
Answer: entropy; the second law of thermodynamics
, ⩥active vs passive transport
Answer: active transport requires energy and work, passive transport
does not.
⩥How would you get an H+ back into the matrix?
Answer: ATP Synthase allows the H+ to come back in.
⩥cell-cell recognition
Answer: the function of glyco-proteins attaching to the cell
⩥What helps to stabilize the membrane?
Answer: cholesterol
⩥membrane proteins?
Answer: integral, peripheral, transmembrane
⩥Where are enzymes embedded?
Answer: mitochondria (in the inner membrane)
⩥Selective Permeability: who can pass easily and who cannot?
Answer: nonpolar and small (ie. CO2, O2, hydrocarbons) atoms can pass
easily while polar, large, and charged atoms cannot.
