Biochemistry and Molecules of Life Review

This video tutorial is designed to prepare students for the biology Keystone exam by covering key topics in biochemistry. It discusses the differences between organic and inorganic compounds, focusing on water's unique properties and its role in hydrogen bonding. The tutorial explains cohesion and adhesion in water, polymerization, and the structure and function of macromolecules like carbohydrates, lipids, nucleic acids, and proteins. It also highlights the importance of enzymes in biological reactions, emphasizing their role in reducing activation energy and facilitating essential processes.

Which of the following is NOT an organic compound?

• Water

• Lipids

• Proteins

• Carbohydrates

What is the atomic number of oxygen?

• 1

• 6

• 8

• 12

Why is water considered a polar molecule?

• It contains only hydrogen atoms.

• It has an even distribution of electrons.

• It is nonpolar.

• It has a slight positive charge on one side and a slight negative charge on the other.

What type of bond is responsible for the cohesion property of water?

• Covalent bond

• Metallic bond

• Hydrogen bond

• Ionic bond

What process involves removing a molecule of water to create a chemical bond?

• Reduction

• Oxidation

• Dehydration synthesis

• Hydrolysis

Which macromolecule is primarily used for long-term energy storage?

• Carbohydrates

• Lipids

• Proteins

• Nucleic acids

What is the monomer of carbohydrates?

• Amino acids

• Fatty acids

• Monosaccharides

• Nucleotides

Which of the following is a component of nucleic acids?

• Nucleotides

• Fatty acids

• Glycerol

• Monosaccharides

What is the primary function of DNA?

• Structural support

• Genetic information storage

• Catalyzing reactions

• Energy storage

What model describes the way enzymes work?

• Bohr model

• Induced fit model

• Lock-and-key model

• Fluid mosaic model