AP Biology Unit 2 practice questions: Cell Structure and Function
8 original multiple-choice questions on AP Bio Unit 2, cell structure and function. Answer each one in your browser and read the explanation, then review the key ideas below.
Question 1 of 8
Which structure is found in both prokaryotic and eukaryotic cells?
Question 2 of 8
An animal cell is placed in a hypertonic solution. What happens?
Question 3 of 8
The sodium-potassium pump is an example of
Question 4 of 8
Which organelle modifies, sorts and packages proteins for secretion?
Question 5 of 8
As a cell grows larger, its surface-area-to-volume ratio
Question 6 of 8
Small nonpolar molecules such as O₂ cross the plasma membrane mainly by
Question 7 of 8
Which evidence supports the endosymbiotic theory of mitochondria?
Question 8 of 8
In osmosis, water moves across a membrane toward the side with
Key ideas in Unit 2
- Prokaryotes lack a nucleus and membrane-bound organelles, but all cells have a plasma membrane, cytoplasm, ribosomes and DNA.
- Organelles divide the work: the rough ER and Golgi make and ship proteins, mitochondria and chloroplasts transform energy.
- Surface-area-to-volume ratio limits cell size.
- The fluid mosaic membrane controls transport: diffusion and osmosis are passive, while pumps like the sodium-potassium pump use ATP.
- Tonicity predicts water movement: cells shrink in hypertonic solutions and swell in hypotonic ones. Endosymbiosis explains the origin of mitochondria and chloroplasts.
More AP Bio practice
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