Biological Macromolecules and Their Functions

The video reviews basic organic chemistry principles related to biological systems, focusing on molecular polarity, functional groups, isomers, and macromolecules. It explains how polarity affects molecular interactions, describes common functional groups in biomolecules, and discusses the significance of isomers and chiral molecules. The video also covers the four main types of macromolecules—carbohydrates, proteins, lipids, and nucleic acids—their structures, functions, and roles in living systems.

What property of a molecule primarily determines its behavior in a biological system?

• Size

• Polarity

• Weight

• Color

Which of the following is a characteristic of the hydroxyl group?

• Contains phosphorus

• Contains sulfur

• Contains nitrogen

• Contains oxygen and hydrogen

What is the role of the carboxyl group in proteins?

• Provides acidity

• Acts as a base

• Acts as a catalyst

• Provides energy

What is the main difference between structural isomers and enantiomers?

• Enantiomers have different structures

• Structural isomers have different structures

• Enantiomers have different chemical formulas

• Structural isomers have different chemical formulas

How do chiral molecules differ from each other?

• By their weight

• By their mirror image orientation

• By their color

• By their size

Which macromolecule is primarily responsible for energy storage in plants?

• Proteins

• Lipids

• Nucleic acids

• Carbohydrates

What is the monomer of nucleic acids?

• Fatty acids

• Nucleotides

• Amino acids

• Monosaccharides

Which of the following is a function of proteins?

• Energy storage

• Insulation

• Catalysis

• Genetic information storage

What process is used to form large polymers from monomers?

• Reduction

• Oxidation

• Dehydration synthesis

• Hydrolysis

How are large molecules broken down into monomers?

• By dehydration synthesis

• By hydrolysis

• By reduction

• By oxidation