Biological Molecules and Reactions

This video tutorial covers the four main types of biological molecules: carbohydrates, lipids, proteins, and nucleic acids. It explains the concepts of monomers and polymers, detailing how monomers like monosaccharides, amino acids, and nucleotides form polymers such as polysaccharides, polypeptides, and polynucleotides. The video also describes the processes of condensation and hydrolysis reactions, highlighting how these reactions synthesize and break down polymers, respectively. Finally, it provides information on additional learning resources available on the Cognito website.

Which of the following is NOT one of the four main types of biological molecules?

• Carbohydrates

• Lipids

• Proteins

• Vitamins

What element is common to all organic molecules?

• Nitrogen

• Hydrogen

• Oxygen

• Carbon

What are the monomers of proteins called?

• Fatty acids

• Nucleotides

• Amino acids

• Monosaccharides

Which of the following is a polymer of glucose?

• Glycogen

• Amino acid

• Nucleotide

• Glycerol

Why are lipids not considered polymers?

• They do not form bonds

• They are inorganic

• They are not made of repeating units

• They do not contain carbon

What is removed during a condensation reaction to form a bond?

• Nitrogen

• Water

• Carbon

• Oxygen

Which molecule provides energy for condensation reactions?

• ATP

• Glucose

• DNA

• RNA

What is the main purpose of hydrolysis reactions?

• To form new molecules

• To break down polymers

• To create energy

• To synthesize proteins

In a hydrolysis reaction, what is used to break a chemical bond?

• Oxygen

• Carbon

• Water

• Nitrogen

What is released as a result of hydrolysis reactions?

• Carbon dioxide

• Oxygen

• Water

• Energy