Question

Biomolecule Abundance in Different Cell Types


A. Biomolecule
B. Muscle Cell (%)
C. Liver Cell (%)
D. Plant LeafCell (%)


A. Carbohydrates
B. 1
C. 5
D. 15


A. Lipids
B. 8
C. 5
D. 3


A. Proteins
B. 20
C. 18
D. 8

A. Nucleic Acids
B. 1
C. 2
D. 1

A. Water & Other
B. 70
C. 70
D. 73


Prompt
Anolyze the data table above and respond to the following prompt:
Muscle cells contain significantly more protein than plant leaf cells, while plant leaf cells contain much more carbohydrate than muscle cells. Using the data provided, construct a claim about why these differences exist.
Support your claim with evidence from the table and reasoning that connects the structure and function of each cell type to its biomolecule composition.

Write in a CER format In. 4th graders response

Answer 1

Claim:
Muscle cells have more proteins, and plant leaf cells have more carbohydrates, because muscles need proteins to move and grow while leaves make and store sugars and build strong cell walls.

Evidence:
- Muscle cell: 20% proteins and only 1% carbohydrates.
- Plant leaf cell: 8% proteins and 15% carbohydrates.

Reasoning:
Muscle cells do a lot of work. They need protein fibers that pull and let your body move. Proteins also help fix and build muscle when you exercise. That is why muscle cells have a lot more protein (20%) than leaf cells (8%).

Leaf cells make food from sunlight (photosynthesis). They make sugars and starches and store them, so they have more carbohydrates (15%) than muscle cells (1%). Also, plant cell walls are mostly made of a carbohydrate called cellulose, which helps leaves stay strong. Because leaves make and keep sugars and have strong walls, they need more carbohydrates than muscles.