BitWithBite
Biology Worksheet
🧪 Animal Cell Organelles
SCORE___ / 20
NameClassDate
After this worksheet you can
Match organelle to functionCompare ribosome typesExplain endosymbiosisRecall the mnemonic📚 Quick Recap
🎯 What you'll practice: Organelle structure and function — nucleus, mitochondria, ribosomes, ER, Golgi, lysosomes.
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1ATP is produced by:
2Eukaryotic ribosomes are:
3The "post office of the cell" is the:
4Lysosomes digest waste using:
🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11
5The RER has on its surface, unlike the SER.
6Mitochondria have their own .
7What is the difference in function between RER and SER?
8Name the two subunits that make up a 70S prokaryotic ribosome.
9What structural feature does the nucleus share with mitochondria?
🚀 Section C · Challenge ● CHALLENGE 5
10Explain what the endosymbiosis theory proposes about the origin of mitochondria, and cite one piece of structural evidence that supports it.
💭 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 = ribosomes 6 = DNA 7 = RER processes/folds proteins made by its attached ribosomes; SER synthesises lipids and detoxifies substances 8 = 50S and 30S 9 = both have a double membrane | 10 = The endosymbiosis theory proposes that mitochondria were once free-living bacteria that were engulfed by a larger host cell and formed a mutually beneficial relationship, eventually becoming a permanent organelle; supporting evidence includes the fact that mitochondria have their own circular DNA and a double membrane, both hallmark features of a formerly independent bacterial cell.