Understanding Nutrients and Their Examples

This question asks us to match different types of nutrients with their specific examples. Understanding the role and common forms of each nutrient is key to solving this.

Analyzing Each Nutrient and Its Example

Let's look at each nutrient listed and identify which example best fits its category:

• Protein: Proteins are large biomolecules essential for building and repairing tissues, making enzymes, hormones, and antibodies. Examples include enzymes, structural components like keratin and collagen, and muscle proteins like myosin. From the given options, Myosin is a well-known example of a protein.
• Carbohydrates: Carbohydrates are the body's main source of energy. They range from simple sugars like glucose and fructose to complex starches and fibers. Glucose is a fundamental simple sugar used directly by cells for energy. From the options, Glucose fits this description perfectly.
• Fat: Fats, also known as lipids, are important for energy storage, insulation, protecting organs, and absorbing fat-soluble vitamins. Examples include triglycerides, phospholipids, and steroids like cholesterol. Cholesterol is a type of fat or lipid found in animal cells and is important for cell membranes and hormone production. Cholesterol is listed as an example.
• Minerals: Minerals are inorganic substances that the body needs in small amounts for various functions, such as building bones, making hormones, and regulating body fluids. Examples include calcium, phosphorus, iron, zinc, sodium, potassium, etc. Calcium and Phosphorous are listed together and are essential minerals, particularly for bone health.

Matching Nutrients to Examples

Based on the analysis above, we can make the following matches:

• Protein (a) matches Myosin (4).
• Carbohydrates (b) matches Glucose (3).
• Fat (c) matches Cholesterol (2).
• Minerals (d) matches Calcium, Phosphorous (1).

This gives us the matching pattern: a - 4, b - 3, c - 2, d - 1.

Summarizing the Nutrient Matching

Here is the summary in a table format:

The correct matching is a - iv, b - iii, c - ii, d - i.

Revision Table: Key Nutrients and Functions

Additional Information on Nutrient Examples

Let's delve a little deeper into the specific examples mentioned:

• Myosin: This is a motor protein found in muscle and other types of eukaryotic cells. It is essential for muscle contraction.
• Glucose: A simple sugar (monosaccharide) that is the primary source of energy for the body's cells. It is transported through the bloodstream and used for cellular respiration.
• Cholesterol: A type of lipid (specifically a steroid) that is vital for building cell membranes and synthesizing hormones like estrogen and testosterone, and Vitamin D. While essential, high levels in the blood can be a health risk.
• Calcium and Phosphorous: These are macronutrients (minerals needed in larger amounts). They are crucial components of bones and teeth, and also involved in nerve function, muscle contraction, and energy metabolism (\(\text{ATP}\) production uses phosphorous).