AP BIOLOGY UNIT 2 EXAM QUESTIONS AND CORRECT
ANSWERS (LATEST 2026)
Phospholipid - ANSWER-a lipid that contains phosphorus and that is a structural
component in cell membranes
Ribosome - ANSWER-Made of rRNA, synthesizes proteins
Plasma membrane - ANSWER-A selectively-permeable phospholipid bilayer forming
the boundary of the cells
Smooth ER - ANSWER-Functions in detoxification and lipid synthesis
Hydrophobic - ANSWER-Water fearing
Rough ER - ANSWER-Associated with ribosomes, compartmentalizes the cell
Hydrophilic - ANSWER-water loving
Golgi complex - ANSWER-Corrects the folding and chemical modification of newly
synthesized proteins, packaging for protein trafficking
Fluid mosaic model - ANSWER-model that describes that cell membranes consist of a
structural framework of phospholipid molecules that is embedded with steroids and
proteins
Lysosome - ANSWER-Membrane-enclosed sac that contain hydrolytic enzymes
Vacuole - ANSWER-Storage and release of macromolecules and cellular waste
products.
Correct arrangement of phospholipids in bilayer - ANSWER-hydrophobic tails pointing
toward inside the membrane, hydrophilic heads pointing out to the extracellular or
intracellular space
Bilayer - ANSWER-a layer that is two molecules thick
Mitochondria - ANSWER-Provides compartments for different metabolic reactions.
Phosphate group - ANSWER-A functional group consisting of a phosphorus atom
covalently bonded to four oxygen atoms
ANSWERS (LATEST 2026)
Phospholipid - ANSWER-a lipid that contains phosphorus and that is a structural
component in cell membranes
Ribosome - ANSWER-Made of rRNA, synthesizes proteins
Plasma membrane - ANSWER-A selectively-permeable phospholipid bilayer forming
the boundary of the cells
Smooth ER - ANSWER-Functions in detoxification and lipid synthesis
Hydrophobic - ANSWER-Water fearing
Rough ER - ANSWER-Associated with ribosomes, compartmentalizes the cell
Hydrophilic - ANSWER-water loving
Golgi complex - ANSWER-Corrects the folding and chemical modification of newly
synthesized proteins, packaging for protein trafficking
Fluid mosaic model - ANSWER-model that describes that cell membranes consist of a
structural framework of phospholipid molecules that is embedded with steroids and
proteins
Lysosome - ANSWER-Membrane-enclosed sac that contain hydrolytic enzymes
Vacuole - ANSWER-Storage and release of macromolecules and cellular waste
products.
Correct arrangement of phospholipids in bilayer - ANSWER-hydrophobic tails pointing
toward inside the membrane, hydrophilic heads pointing out to the extracellular or
intracellular space
Bilayer - ANSWER-a layer that is two molecules thick
Mitochondria - ANSWER-Provides compartments for different metabolic reactions.
Phosphate group - ANSWER-A functional group consisting of a phosphorus atom
covalently bonded to four oxygen atoms
