BIOL 133 CHAPTER 5 | COMPREHENSIVE BIOLOGY STUDY GUIDE, PRACTICE
QUESTIONS & ANSWERS 2026/2027
What components are or can be present in cellular passive transport?
A. phospholipids
B. ATP
C. concentration gradient
D. carrier proteins
E. amphiphilic molecules - correct answer ✔✔A. phospholipids
C. concentration gradient
D. carrier proteins
E. amphiphilic molecules
What substance would have the slowest speed of passage across a selectively permeable membrane?
A. nonpolar large molecules
B. nonpolar small molecules
C. large polar molecules
D. small polar molecules - correct answer ✔✔C. large polar molecules
The fluid mosaic model describes membranes as fluid due to
A. phospholipids sporadically placed throughout the membrane
B. the membrane is mostly composed of water
C. the proteins and the phospholipids can move laterally throughout the membrane
D. higher amounts of cholesterol
E. higher amounts of cholesterol - correct answer ✔✔C. the proteins and the phospholipids can move
laterally throughout the membrane
Molecules move from a high to low concentration in:
A. isotonic solutions
B. hypotonic solutions
C. hypertonic solutions
D. diffusion
E. osmosis - correct answer ✔✔D. diffusion
What molecule(s) could diffuse across the plasma membrane?
A. disaccharides
B. Fe^2+
C. trptophan amino acid
D. CH(4) - correct answer ✔✔D. CH(4)
What is the first step of the Na+-K+ pump?
A. The carrier protein has a reduced affinity for Na+
B. ATP is hydrolyzed by a protein carrier
C. Carrier protein binds to 3 Na+
D. Phosphate group is removed and K+ is attached
QUESTIONS & ANSWERS 2026/2027
What components are or can be present in cellular passive transport?
A. phospholipids
B. ATP
C. concentration gradient
D. carrier proteins
E. amphiphilic molecules - correct answer ✔✔A. phospholipids
C. concentration gradient
D. carrier proteins
E. amphiphilic molecules
What substance would have the slowest speed of passage across a selectively permeable membrane?
A. nonpolar large molecules
B. nonpolar small molecules
C. large polar molecules
D. small polar molecules - correct answer ✔✔C. large polar molecules
The fluid mosaic model describes membranes as fluid due to
A. phospholipids sporadically placed throughout the membrane
B. the membrane is mostly composed of water
C. the proteins and the phospholipids can move laterally throughout the membrane
D. higher amounts of cholesterol
E. higher amounts of cholesterol - correct answer ✔✔C. the proteins and the phospholipids can move
laterally throughout the membrane
Molecules move from a high to low concentration in:
A. isotonic solutions
B. hypotonic solutions
C. hypertonic solutions
D. diffusion
E. osmosis - correct answer ✔✔D. diffusion
What molecule(s) could diffuse across the plasma membrane?
A. disaccharides
B. Fe^2+
C. trptophan amino acid
D. CH(4) - correct answer ✔✔D. CH(4)
What is the first step of the Na+-K+ pump?
A. The carrier protein has a reduced affinity for Na+
B. ATP is hydrolyzed by a protein carrier
C. Carrier protein binds to 3 Na+
D. Phosphate group is removed and K+ is attached
