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MDCAT Worksheet

🔬 Cell Biology

Chapter: Biology · Level ★★☆ · Time: 25 min
SCORE___ / 20
NameClassDate
After this worksheet you can
Describe mitochondria & ribosomesName lysosomal diseasesExplain the fluid mosaic modelPredict osmosis outcomes
📚 Quick Recap

🎯 What you'll practice: Organelle structure/function, lysosomal storage diseases, membrane structure, and osmosis.

🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4

1Eukaryotic ribosomes are:
2Tay-Sachs disease is caused by deficiency of:
3A cell in a hypotonic solution will:
4Mitochondrial inner folds are called:

🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11

5Prokaryotic ribosomes are S, made of 30S + 50S subunits.
6Plant cells in a hypertonic solution undergo .
7Name the three main components of the fluid mosaic model.
8Which organelle has its own DNA, and why is that significant?
9Which enzyme is deficient in Gaucher disease?

🚀 Section C · Challenge ● CHALLENGE 5

10A red blood cell placed in distilled water bursts, but a plant cell placed in the same water does not. Explain the difference using the fluid mosaic model and cell wall structure.
💭 Reflection — the most useful thing I learned:
A ___/4   B ___/11   C ___/5   Total ___/20 Teacher's Signature Parent's Signature
✂ answer key — fold or cut before handing out

1-B   2-B   3-B   4-B  |  5 = 70   6 = plasmolysis   7 = phospholipid bilayer, integral/peripheral proteins, glycoproteins   8 = mitochondria; significant because it suggests an endosymbiotic origin and allows mitochondria to replicate somewhat independently of the nucleus   9 = glucocerebrosidase  |  10 = In distilled (hypotonic) water, both cells' phospholipid bilayers let water rush in by osmosis; a red blood cell has only the fluid, elastic plasma membrane so it swells until it bursts (lysis), while a plant cell has a rigid cellulose cell wall outside the membrane that resists the incoming pressure, so the cell just becomes turgid instead of bursting.

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