Free Printable Macromolecules Worksheets - Free Printable

Let's solve this Macromolecules Worksheet step by step, with explanations for each answer.

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Part A: Which specific molecule (saturated fat, unsaturated fat, protein, glucose, starch, cellulose) is each food mostly made of?

We need to identify the primary macromolecule in each food item based on its biological composition.

1. Almond – *Unsaturated fat*
→ Almonds are rich in healthy fats, especially monounsaturated and polyunsaturated fats.

2. Celery – *Cellulose*
→ Celery is a plant; its cell walls are made of cellulose, a structural polysaccharide.

3. Spinach – *Cellulose*
→ Like all plants, spinach contains cellulose in its cell walls.

4. Soy beans – *Protein*
→ Soybeans are a major source of plant-based protein.

5. Beef jerky – *Protein*
→ Made from dried meat, so it’s primarily protein.

6. Cranberries – *Glucose*
→ Fruits like cranberries contain natural sugars, mainly glucose and fructose.

7. Bacon – *Saturated fat*
→ Bacon is animal fat, high in saturated fatty acids.

8. Egg white – *Protein*
→ Egg whites are mostly water and proteins (like albumin).

9. Noodles – *Starch*
→ Noodles are made from wheat flour, which is rich in starch.

10. Table sugar – *Glucose*
→ Table sugar is sucrose, which breaks down into glucose and fructose. But since glucose is listed as an option and is a primary component, we can say glucose (though technically it's a disaccharide, but the question asks for the main molecule — glucose is correct in context).

11. Orange juice – *Glucose*
→ Fruit juices contain natural sugars, primarily glucose and fructose.

12. Popcorn – *Starch*
→ Popcorn comes from corn kernels, which are rich in starch.

13. Cheese – *Saturated fat*
→ Cheese is high in animal fat, mostly saturated.

14. Lobster – *Protein*
→ Lobster meat is a lean source of protein.

15. Wheat – *Starch*
→ Wheat grains are rich in starch (a storage polysaccharide).

16. Sesame oil – *Unsaturated fat*
→ Sesame oil is extracted from seeds and is rich in unsaturated fatty acids.

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✔ Part A Answers:

| # | Food | Main Molecule |
|---|---------------|------------------------|
| 1 | Almond | Unsaturated fat |
| 2 | Celery | Cellulose |
| 3 | Spinach | Cellulose |
| 4 | Soy beans | Protein |
| 5 | Beef jerky | Protein |
| 6 | Cranberries | Glucose |
| 7 | Bacon | Saturated fat |
| 8 | Egg white | Protein |
| 9 | Noodles | Starch |
|10 | Table sugar | Glucose |
|11 | Orange juice | Glucose |
|12 | Popcorn | Starch |
|13 | Cheese | Saturated fat |
|14 | Lobster | Protein |
|15 | Wheat | Starch |
|16 | Sesame oil | Unsaturated fat |

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Part B: State whether each is found in animals, plants, or both.

We fill in the monomer and polymer for each macromolecule and then indicate where they are found.

| Macromolecules | Monomer | Polymer | Found in: |
|--------------------|---------------------|------------------------|----------------------|
| Carbohydrates | Monosaccharide (e.g., glucose) | Polysaccharide (e.g., starch, cellulose) | Both (starch in plants, glycogen in animals) |
| Lipids | Glycerol + Fatty acid | Triglyceride (fat), phospholipid | Both (animals and plants have fats and oils) |
| Proteins | Amino acid | Polypeptide/Protein | Both (all living things make proteins) |
| Nucleic Acids | Nucleotide | DNA, RNA | Both (all cells have DNA/RNA) |

> Note: While some lipids (like cholesterol) are only in animals, basic triglycerides and phospholipids exist in both.

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Part C: Short Answer Questions

(a) Which type of macromolecule provides long-term energy storage?
→ Lipids
> Explanation: Fats (lipids) store more energy per gram than carbohydrates and are used for long-term energy storage in both animals (adipose tissue) and plants (seeds).

(b) Which macromolecule includes steroids and fatty acids?
→ Lipids
> Explanation: Lipids include fats, oils, phospholipids, and steroids (like cholesterol). Fatty acids are building blocks of triglycerides and other lipids.

(c) Which macromolecule includes DNA and RNA?
→ Nucleic Acids
> Explanation: DNA and RNA are nucleic acids that store and transmit genetic information.

(d) Which macromolecule includes glucose and starch?
→ Carbohydrates
> Explanation: Glucose is a monosaccharide (monomer), and starch is a polysaccharide (polymer) made of many glucose units.

(e) Which macromolecule includes hair and muscles?
→ Proteins
> Explanation: Hair is made of keratin (a protein), and muscle fibers are made of actin and myosin (proteins).

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✔ Final Answers Summary:

#### Part A:
1. Unsaturated fat
2. Cellulose
3. Cellulose
4. Protein
5. Protein
6. Glucose
7. Saturated fat
8. Protein
9. Starch
10. Glucose
11. Glucose
12. Starch
13. Saturated fat
14. Protein
15. Starch
16. Unsaturated fat

#### Part B:
| Macromolecules | Monomer | Polymer | Found in: |
|--------------------|------------------------|------------------------------|----------------|
| Carbohydrates | Monosaccharide | Polysaccharide | Both |
| Lipids | Glycerol + Fatty acid | Triglyceride / Phospholipid | Both |
| Proteins | Amino acid | Polypeptide / Protein | Both |
| Nucleic Acids | Nucleotide | DNA / RNA | Both |

#### Part C:
(a) Lipids
(b) Lipids
(c) Nucleic Acids
(d) Carbohydrates
(e) Proteins

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