Exploring Biological Macromolecules

This video tutorial introduces biological macromolecules, focusing on dehydration and hydrolysis reactions. It covers the four classes of macromolecules: carbohydrates, proteins, nucleic acids, and lipids, explaining the role of carbon in molecular diversity. The video defines polymers and monomers, illustrating how dehydration reactions form polymers and hydrolysis reactions break them down. Practice problems and concept questions are included to reinforce understanding, with a discussion on carbon's essential role in life and a comparison to silicon.

Which element is central to the molecular diversity of biological macromolecules?

• Carbon

• Oxygen

• Nitrogen

• Phosphorus

Which of the following is NOT a true polymer?

• Carbohydrates

• Lipids

• Proteins

• Nucleic acids

What are the smaller units that make up polymers called?

• Ions

• Monomers

• Atoms

• Molecules

What type of reaction bonds two or more monomers with the loss of water?

• Reduction

• Oxidation

• Dehydration

• Hydrolysis

In a hydrolysis reaction, what is added to break bonds in a polymer?

• Oxygen

• Carbon dioxide

• Hydrogen

• Water

What is the product when glucose and fructose undergo a dehydration reaction?

• Cellulose

• Sucrose

• Lactose

• Maltose

How many water molecules are needed to completely hydrolyze a polymer made of 300 glucose monomers?

• 298

• 301

• 299

• 300

What property of carbon makes it essential for life?

• It is highly reactive

• It is abundant in water

• It has four valence electrons

• It is a metal

Which element is directly below carbon in the periodic table and has similar properties?

• Nitrogen

• Oxygen

• Phosphorus

• Silicon

Why is carbon more likely than silicon to be the basis for life?

• Silicon is a gas

• Carbon is more abundant in the universe

• Silicon cannot form bonds

• Carbon is more reactive