Eukaryotic Cell Biology — Study Guide
A condensed review of organelles, ATP production, and photosynthesis
Description
A focused review companion to the main Eukaryotic Cell Biology lesson. Use this study guide to refresh on the essentials: every major organelle in one place, the three stages of cellular respiration, the two stages of photosynthesis, and how the two energy processes work as partners. Includes self-quiz items and links back to the main lesson for deep dives.
Learning Objectives
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Recall the structure and function of major organelles in eukaryotic cells.
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Recall the three stages, locations, and overall equation of cellular respiration.
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Recall the two stages, locations, and overall equation of photosynthesis.
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Compare and contrast cellular respiration and photosynthesis.
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# Eukaryotic Cell Biology — Study Guide
This is a condensed review of the main Eukaryotic Cell Biology lesson. Use it to refresh on the essentials before a quiz, test, or class discussion.
You'll get the most out of this study guide if you have already worked through the main lesson. This guide is for review — not for first-time learning.
For each section: read the summary, study the diagram, and try the quick checks at the end.
## Section 1: Reference Infographics
Spend 2-3 minutes studying each infographic below. Cover the labels with your hand and try to name each organelle. Then check yourself.
## Section 2: Organelle Cheat Sheet
Quick reference for every major organelle. Each one has a single sentence that tells you what it does.
Plasma membrane — controls what enters and exits the cell (in BOTH plant and animal cells) Cell wall — rigid outer layer made of cellulose; gives plants their shape (PLANT only)
Nucleus — control center; holds the DNA; directs the cell's activities Nucleolus — small dark spot inside the nucleus; the ribosome factory Ribosomes — tiny machines that build proteins by reading mRNA
Rough ER — covered with ribosomes; builds and folds proteins Smooth ER — no ribosomes; makes lipids and detoxifies substances Golgi apparatus — stack of flat sacs; modifies, sorts, and packages proteins Vesicles — tiny membrane bubbles; transport materials between organelles Lysosomes — sacs of digestive enzymes; break down waste (animal cells) Peroxisomes — break down fatty acids and detoxify (both cell types)
Mitochondria — the powerhouse; produce ATP through cellular respiration (BOTH cell types — yes, plants too!) Chloroplasts — capture sunlight to make glucose through photosynthesis (PLANT only)
Central vacuole — large fluid-filled sac; stores water and maintains turgor pressure (PLANT only) Cytoskeleton — protein fibers; the cell's "bones and highways" Centrioles — organize spindle fibers during cell division (mostly ANIMAL only) Cytoplasm — gel-like fluid that fills the cell
## Section 3: Cellular Respiration — The Essentials
Cellular respiration is how cells break down glucose to make ATP. Most of it happens inside the mitochondria.
Stage 1 — Glycolysis (in the cytoplasm) Glucose → 2 pyruvate; nets 2 ATP; no oxygen needed.
Stage 2 — Krebs Cycle (in the mitochondrial matrix) Pyruvate fully broken down; releases CO₂; nets 2 ATP; loads up electron carriers.
Stage 3 — Electron Transport Chain (on the cristae) Uses oxygen; produces ~26 ATP; releases water. This is where most ATP is made!
Total: ~30 ATP per glucose.
C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + ~30 ATP
Glucose + oxygen → carbon dioxide + water + ATP
## Section 4: Photosynthesis — The Essentials
Photosynthesis is how plant cells convert sunlight into chemical energy stored in glucose. It happens inside the chloroplasts.
Stage 1 — Light Reactions (in the thylakoid membranes) Chlorophyll absorbs sunlight; splits water; releases O₂; makes ATP and NADPH.
Stage 2 — Calvin Cycle (in the stroma — the fluid) Uses CO₂ from the air, plus ATP and NADPH from the light reactions, to build glucose.
Key fact: the oxygen released by photosynthesis comes from splitting WATER, not carbon dioxide!
6 CO₂ + 6 H₂O + light energy → C₆H₁₂O₆ + 6 O₂
Carbon dioxide + water + light → glucose + oxygen
## Section 5: Photosynthesis vs. Cellular Respiration
The two energy processes work as partners. The products of one are the reactants of the other.
| | Photosynthesis | Cellular Respiration | |---|---|---| | Where | Chloroplasts | Mostly mitochondria | | Who does it | Plants only | EVERY eukaryotic cell | | Inputs | CO₂ + H₂O + light | Glucose + O₂ | | Outputs | Glucose + O₂ | CO₂ + H₂O + ATP | | Energy | Stores it (builds glucose) | Releases it (makes ATP) | | When | Daytime only | All the time, day and night |
Plants do BOTH! They photosynthesize during the day AND respire 24/7.
Energy ENTERS the system from the sun, gets stored in glucose, and eventually leaves as heat (one-way). Matter (carbon, oxygen, water atoms) RECYCLES between photosynthesis and respiration over and over (cyclical).
## Section 6: Plant vs. Animal Cell
A side-by-side comparison of the two main eukaryotic cell types you need to know.
PLANT cells uniquely have: - Cell wall (rigid outer layer, made of cellulose) - Central vacuole (giant water-storage sac) - Chloroplasts (for photosynthesis)
ANIMAL cells uniquely have: - Centrioles (for cell division) - More prominent lysosomes
Both cell types share: plasma membrane, nucleus, ribosomes, rough ER, smooth ER, Golgi, mitochondria, vesicles, peroxisomes, cytoskeleton, cytoplasm
## Section 7: Self-Quiz
Twelve quick checks to test your readiness. Try to answer without looking back. If you miss one, the related section above is where to review.
Assessment Questions
12 questionsWhich organelle is found in plant cells but NOT in animal cells?
Match each organelle to its primary function:
Plant cells have BOTH chloroplasts AND mitochondria.
The rigid outer layer of a plant cell, made of cellulose, is called the ______ ______.
Which stage of cellular respiration produces the MOST ATP?
Standards Alignment
Resource Details
- Subject
- Science
- Language
- EN-US
- Author
- Kris Edwards
- License
- CC-BY-4.0
- PRISM ID
- eukaryotic-cell-biology-study-guide