Cell Power Worksheet
Biology Reading Comprehension
Cell Power Worksheet
8 Questions
Article: Cellular Respiration
Name:
Date:
Score: / 25
Directions: Refer to the article "Cellular Respiration" to answer each question thoroughly. Provide complete sentences for written-response questions.
1
Vocabulary & Cellular Structures
-
According to the article, what does the word "cellular" mean, and how does cellular respiration differ from ordinary breathing?
-
In which tiny specialized part (organelle) of the cell does cellular respiration occur?
A Nucleus
B Mitochondria
C Cell Membrane
D Cytoplasm
2
The Respiration Reaction
- Based on the diagram and text, identify the two inputs that go into the reaction and the three outputs that come out.
Inputs (2 needed)
Chemical Reaction
Outputs (3 produced)
- What is the primary purpose of cellular respiration for your cells and your body as a whole?
A To eliminate extra water from cells
B To release energy needed to function
C To create new glucose molecules
D To trap carbon dioxide inside cells
Cellular Respiration • Student Worksheet Page 1 of 2
Cell Power Worksheet • Comprehension & Analysis
Student Name:
3
Output Pathways & Systems Connection
- The chemical reaction produces three distinct outputs. Explain what the cell or body does with each output:
Energy:
Water:
Carbon Dioxide:
- When you exhale (breathe out), you release carbon dioxide into the air. Where did this gas originally come from, and how are your lungs connected to the activity inside individual cells?
4
Application & Synthesis
-
The article emphasizes that cellular respiration occurs continuously, "whether you are exercising, sitting still, or sleeping." Why can cells never completely shut down this chemical reaction?
-
Write a concise summary (2–3 sentences) describing cellular respiration to a classmate. Be sure to mention the inputs, the organelle involved, and what is released.
Cellular Respiration • Student Worksheet Page 2 of 2
Cell Power Answer Key
Teacher Edition Answer Key & Scoring Guide
Cell Power Answer Key
Total: 25 Points
Target Grade: 6th–8th Science
Grading Protocol: Accept reasonable student variations for short responses that demonstrate core conceptual understanding.
Page 1: 13 pts
1
Vocabulary & Cellular Structures
6 Points
- Meaning of "cellular" and difference between cellular respiration and breathing:
4 pts
Model Answer: "Cellular" means "having to do with cells." While breathing (respiration) is the physical act of inhaling oxygen into the lungs and exhaling carbon dioxide through the mouth and nose, cellular respiration is a chemical reaction inside individual cells that combines glucose and oxygen to release usable energy.
• 2 pts: defines "cellular" (having to do with cells) • 2 pts: contrasts physical breathing with chemical energy release
- Organelle where cellular respiration takes place:
2 pts
A. Nucleus
B. Mitochondria
C. Cell Membrane
D. Cytoplasm
2
The Respiration Reaction
7 Points
- Identification of Inputs and Outputs:
5 pts (1 pt each)
Inputs (2 pts)
Oxygen (O₂)
Glucose (Sugar)
React in Mitochondria
Outputs (3 pts)
Carbon Dioxide (CO₂)
Water (H₂O)
Energy (ATP)
- Primary purpose of cellular respiration:
2 pts
A. To eliminate extra water
B. To release energy needed to function
C. To create new glucose
D. To trap carbon dioxide
Cell Power Teacher Guide • Cellular Respiration Answer Key Page 1 of 2
Cell Power Answer Key • Page 2 Guide Page 2: 12 pts
3
Output Pathways & Systems Connection
6 Points
- What the cell or body does with each output:
3 pts (1 pt each)
• Energy: Used directly by the cell to power cellular work and bodily functions (e.g., muscle movement, growth, repair, basic metabolism).
• Water: Stored in the cell or sent out to be utilized elsewhere in the body.
• Carbon Dioxide: Treated as a waste product; eliminated by the cell, transported through blood to the lungs, and expelled when breathing out.
