Question 1

What are the main types of biological molecules that serve as nutrients?

Accepted Answer

The main types of biological molecules that serve as nutrients include carbohydrates, proteins, lipids, vitamins, and minerals. Each of these plays a crucial role in maintaining the body's functions. Carbohydrates provide energy, proteins are essential for growth and repair, lipids store energy and insulate the body, while vitamins and minerals support various biochemical processes.

Question 2

How do carbohydrates function as nutrients in the human body?

Accepted Answer

Carbohydrates are a primary source of energy for the human body. They are broken down into glucose, which is used by cells to produce ATP, the energy currency of the cell. In the Singapore Curriculum, students learn that carbohydrates are classified into simple sugars, like glucose and fructose, and complex carbohydrates, such as starch and fiber, which are important for digestive health.

Question 3

Why are proteins considered essential nutrients in Biology?

Accepted Answer

Proteins are essential nutrients because they are the building blocks of the body. They are made up of amino acids, which are necessary for the synthesis of new proteins that form muscles, enzymes, hormones, and other vital components. In the Singapore Curriculum, students explore how proteins are involved in growth, repair, and the regulation of bodily functions.

Question 4

What role do lipids play in nutrition according to the Singapore Curriculum?

Accepted Answer

Lipids, commonly known as fats, play several important roles in nutrition. They are a dense source of energy, provide insulation to maintain body temperature, and are essential for the absorption of fat-soluble vitamins (A, D, E, and K). The Singapore Curriculum emphasizes the importance of lipids in cell membrane structure and hormone production.

Question 5

How do vitamins and minerals contribute to human health as nutrients?

Accepted Answer

Vitamins and minerals are micronutrients that support numerous physiological functions. Vitamins are organic compounds that aid in processes such as energy production, immune function, and blood clotting. Minerals, like calcium and iron, are inorganic elements that contribute to bone health and oxygen transport, respectively. The Singapore Curriculum highlights their role in maintaining overall health and preventing deficiencies.

Biological Molecules - Nutrients

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