ACT SSC Biology — Unit 1
Cell Structure — Flashcards & Quiz
ACT SSC Biology Year 12 Unit 1 covers cell structure at the molecular and organellar level, including the comparison between prokaryotic and eukaryotic cells and the functions of the major organelles. You need to link each organelle's structure to its role and explain how they cooperate in the endomembrane system.
Sample Flashcards
Q1: What is the key structural difference between prokaryotic and eukaryotic cells?
Prokaryotic cells lack a membrane-bound nucleus and organelles; eukaryotic cells have a true nucleus enclosed by a nuclear envelope and membrane-bound organelles.
Q2: What is the function of the cell wall in plant cells?
The cell wall (made of cellulose) provides structural support, maintains cell shape, and prevents the cell from bursting when water enters by osmosis.
Sample Quiz Questions
Q1: Prokaryotic cells have a membrane-bound nucleus.
Answer: FALSE
Prokaryotic cells lack a membrane-bound nucleus. Their DNA is in a nucleoid region.
Q2: Both prokaryotic and eukaryotic cells contain ribosomes.
Answer: TRUE
Ribosomes are found in all cells — prokaryotic (70S) and eukaryotic (80S) — for protein synthesis.
Q3: The cell wall in plant cells prevents lysis in hypotonic solutions.
Answer: TRUE
The cellulose cell wall resists expansion, preventing lysis. The cell becomes turgid instead.
Last updated: March 2026 · 2 flashcards · 3 quiz questions