Exploring Biological Molecules and Their Functions

This video explores the essential biological molecules: carbohydrates, proteins, and lipids. It begins with an introduction to the importance of these molecules in biology, followed by a discussion on the role of water in living organisms. The video then delves into the types and functions of carbohydrates, proteins, and lipids, explaining their structures and roles in life processes. The conclusion summarizes the key points covered.

What percentage of an adult human's body weight is made up of water?

• 55-60%

• 40-45%

• 30-35%

• 70-75%

Which element is NOT found in carbohydrates?

• Carbon

• Hydrogen

• Oxygen

• Nitrogen

What type of carbohydrate is sucrose?

• Monosaccharide

• Trisaccharide

• Polysaccharide

• Disaccharide

Which polysaccharide is used by animals to store surplus glucose?

• Starch

• Cellulose

• Glycogen

• Fructose

What is the monomer unit of proteins?

• Nucleotides

• Fatty acids

• Amino acids

• Glucose

How many different amino acids are there that make up proteins?

• 30

• 10

• 20

• 40

Which of the following is NOT a function of proteins?

• Enzymes

• Storage of genetic information

• Antibodies

• Hormones

What is the structure of a triglyceride?

• One glycerol molecule with two fatty acid tails

• One glycerol molecule with three fatty acid tails

• Two glycerol molecules with three fatty acid tails

• Two glycerol molecules with two fatty acid tails

Which of the following is NOT an example of a lipid?

• Cholesterol

• Steroid hormones

• Vitamin A

• Insulin

Which of the following is NOT one of the three key biological molecules?

• Proteins

• Nucleic acids

• Carbohydrates

• Lipids