Introduction to Biochemistry
Biochemistry is the study of the chemical processes and substances that
occur within living organisms. It is a multidisciplinary field that combines
elements of chemistry, physics, and biology to understand the complex
molecular systems that drive life.
As Dr. David Lynn, a professor of biochemistry at Emory University, explains
in the lecture videos, "Biochemistry is the study of how cells work at the
molecular level."
Macromolecules: the building blocks of life
The central focus of biochemistry is the study of macromolecules, which are
large, complex molecules that are essential to the structure and function of
living organisms. There are four main classes of macromolecules:
Carbohydrates: These are molecules that contain carbon, hydrogen, and
oxygen atoms and are often used as energy storage and structural
components in cells. Examples include glucose, starch, and cellulose.
Lipids: These are molecules that are insoluble in water and are often used as
energy storage and as components of cell membranes. Examples include
triglycerides, phospholipids, and steroids.
Proteins: These are complex molecules that are made up of long chains of
amino acids and are involved in a wide range of cellular functions, including
catalyzing chemical reactions, providing structural support, and regulating
cellular processes. Examples include enzymes, hormones, and antibodies.
Nucleic acids: These are molecules that contain genetic information and are
responsible for the replication and expression of genes. Examples include
DNA and RNA.
Step-by-step calculation: calculating the molecular weight of a protein
To calculate the molecular weight of a protein, you need to know the
molecular weights of the individual amino acids that make up the protein.
Here is an example of how to calculate the molecular weight of a simple
protein with the following sequence:
Biochemistry is the study of the chemical processes and substances that
occur within living organisms. It is a multidisciplinary field that combines
elements of chemistry, physics, and biology to understand the complex
molecular systems that drive life.
As Dr. David Lynn, a professor of biochemistry at Emory University, explains
in the lecture videos, "Biochemistry is the study of how cells work at the
molecular level."
Macromolecules: the building blocks of life
The central focus of biochemistry is the study of macromolecules, which are
large, complex molecules that are essential to the structure and function of
living organisms. There are four main classes of macromolecules:
Carbohydrates: These are molecules that contain carbon, hydrogen, and
oxygen atoms and are often used as energy storage and structural
components in cells. Examples include glucose, starch, and cellulose.
Lipids: These are molecules that are insoluble in water and are often used as
energy storage and as components of cell membranes. Examples include
triglycerides, phospholipids, and steroids.
Proteins: These are complex molecules that are made up of long chains of
amino acids and are involved in a wide range of cellular functions, including
catalyzing chemical reactions, providing structural support, and regulating
cellular processes. Examples include enzymes, hormones, and antibodies.
Nucleic acids: These are molecules that contain genetic information and are
responsible for the replication and expression of genes. Examples include
DNA and RNA.
Step-by-step calculation: calculating the molecular weight of a protein
To calculate the molecular weight of a protein, you need to know the
molecular weights of the individual amino acids that make up the protein.
Here is an example of how to calculate the molecular weight of a simple
protein with the following sequence:
