Food and Nutrition Quiz

Study Notes

Food + Nutrition

Test for Starch:
- Iodine test reveals starch presence; changes from brown to blue-black.
- Water used as a control substance to compare results.
Structural Role of Carbohydrates:
- Cellulose is a vital carbohydrate that forms plant cell walls, providing structure and rigidity.
Metabolic Role of Carbohydrates:
- Carbohydrates serve as a primary energy source for ATP production.
- They play a crucial role in energy storage within organisms.
Lipids:
- Composed of Carbon (C), Hydrogen (H), and Oxygen (O) without a fixed ratio; contains minimal oxygen.
- At room temperature, fats are typically solid while oils are liquid.
- Triglycerides consist of one glycerol molecule bonded to three fatty acids.
- Phospholipids have a phosphate group that replaces one fatty acid, essential for forming cell membranes.
Structural Role of Lipids:
- Integral components of cell membranes, providing structural integrity.
- Serve to insulate heat, protect internal organs, and act as energy reserves.
- Involved in storing fat-soluble vitamins and hormones.
Test for Lipids:
- Brown paper test detects lipids; a translucent stain indicates the presence of fats.
Proteins:
- Consist of Carbon (C), Hydrogen (H), Oxygen (O), and Nitrogen (N); some proteins also include Sulfur (S) and Phosphorus (P).
- Proteins are large, complex molecules with no fixed atomic ratio.
- Made from 20 common amino acids, characterized by distinct functional groups: the carboxyl group (COOH) and the amine group (-NH2).

Description

Test your knowledge on the roles and structures of carbohydrates and lipids. This quiz covers key concepts such as the iodine test for starch, the metabolic functions of carbohydrates, and the composition of lipids including triglycerides and phospholipids. Challenge yourself and deepen your understanding of food and nutrition.