Biological Molecules and Their Functions

This video introduces organic chemistry basics for grade 10 students, focusing on proteins, carbohydrates, and fats. It explains how these macromolecules are broken down into monomers for absorption in the body. The video covers the chemical structure of organic compounds, the role of carbohydrates in plants and animals, the functions of proteins and their sensitivity to environmental changes, and the roles of lipids in energy storage and cell structure. The video concludes with a call to explore additional resources for further learning.

What are the basic units of proteins that are absorbed by the body?

• Glycerol

• Fatty acids

• Amino acids

• Monosaccharides

Which element is added to proteins that is not found in carbohydrates and fats?

• Oxygen

• Hydrogen

• Nitrogen

• Carbon

What is the simplified ratio of carbon to hydrogen to oxygen in glucose?

• 1:2:1

• 1:1:1

• 2:1:2

• 6:12:6

What is the storage form of glucose in plants?

• Sucrose

• Glycogen

• Starch

• Cellulose

What is the role of cellulose in plants?

• Photosynthesis

• Structural support

• Nutrient absorption

• Energy storage

How many different amino acids have been identified?

• 24

• 18

• 20

• 22

What happens to proteins when they are exposed to extreme temperatures or pH levels?

• They dissolve

• They denature

• They replicate

• They become more active

What is the base monomer of a triglyceride?

• Fatty acid

• Glycerol

• Amino acid

• Glucose

Which type of fat is considered healthier due to its hydrogen bonding?

• Saturated fat

• Trans fat

• Polyunsaturated fat

• Unsaturated fat

What is one of the main functions of lipids in the body?

• Oxygen transport

• Protein synthesis

• Energy storage

• DNA replication