Ch 4: Macromolecules

About This Chapter

View these video lessons to learn about macromolecules. Our instructors show you what you need to know about the structures and functions of these large molecules.

Macromolecules - Chapter Summary

In this chapter, our lessons offer detailed explanations of the classes of macromolecules, which are carbohydrates, lipids, proteins and nucleic acids. Instructors discuss key terms as well as the role of macromolecules in cellular functions. Specifically, this chapter can help you:

  • Identify the structures and functions of carbohydrates, lipids and proteins
  • Discuss characteristics of the 20 amino acids
  • Explain amino acids, polymerization and peptide bonds
  • Examine the primary, secondary, tertiary and quaternary structures of proteins
  • Describe the chemical structures of nucleic acids and phosphodiester bonds
  • Explain the double helix structure of DNA
  • Identify the differences between RNA and DNA

Our instructors, experts in their field, break down complex subject matter into smaller components to help you master the materials. Each lesson is less than 10 minutes long and can be viewed multiple times. If you need to review one or two main parts of the lesson, use tags to jump to that section of the video. Each lesson also offers a multiple choice quiz to help you assess how well you grasped the information.

10 Lessons in Chapter 4: Macromolecules
Test your knowledge with a 30-question chapter practice test
Structure and Function of Carbohydrates

1. Structure and Function of Carbohydrates

Carbohydrates are found in many foods that we eat and may be found as sugars, starches, or fiber. Learn more about these three distinct types of carbohydrates, and how they are distinguished through their chemical structures in this lesson.

Structure and Function of Lipids

2. Structure and Function of Lipids

Molecules called lipids have long hydrocarbon chains that determine the way they act. They can be fats, oils, or hormones, and even exist in our cell membranes. Learn more about the chemical structure and biological function of various lipids in this lesson.

Proteins I: Structure and Function

3. Proteins I: Structure and Function

We need our proteins, not just as a major food group but for the many useful roles that they play in our bodies. In our introductory lesson to proteins, you'll learn about the many functions we rely on them to perform.

Proteins III: Structure and Characteristics of the 20 Amino Acids

4. Proteins III: Structure and Characteristics of the 20 Amino Acids

How do amino acids form the intricate polypeptide chains found in proteins? It's a matter of chemistry. Join glycine, a special amino acid, as she sizes up the other amino acids.

Proteins II: Amino Acids, Polymerization and Peptide Bonds

5. Proteins II: Amino Acids, Polymerization and Peptide Bonds

In this lesson, we'll take a deeper look at amino acids. You'll learn what makes a peptide, and what separates a protein from other kinds of amino acid bonds.

Proteins IV: Primary, Secondary, Tertiary and Quaternary Structure

6. Proteins IV: Primary, Secondary, Tertiary and Quaternary Structure

How is progressing through higher order protein structures like crafting an essay? In this lesson, you'll explore everything from quaternary structures to denaturation as we show how the different structures are intertwined.

DNA: Chemical Structure of Nucleic Acids & Phosphodiester Bonds

7. DNA: Chemical Structure of Nucleic Acids & Phosphodiester Bonds

In this lesson, you'll discover what nucleotides look like and how they come together to form polynucleotides. We'll also explore nucleic acids and focus on DNA in particular.

DNA: Adenine, Guanine, Cytosine, Thymine & Complementary Base Pairing

8. DNA: Adenine, Guanine, Cytosine, Thymine & Complementary Base Pairing

Learn the language of nucleotides as we look at the nitrogenous bases adenine, guanine, cytosine and thymine. Armed with this knowledge, you'll also see why DNA strands must run in opposite directions.

DNA: Discovery, Facts, Structure & Function in Heredity

9. DNA: Discovery, Facts, Structure & Function in Heredity

This lesson will help you to navigate the twists and turns of DNA's structure. We'll also clue you in on the amazing discoveries that put this nucleic acid in the limelight as the molecule of heredity.

Differences Between RNA and DNA & Types of RNA (mRNA, tRNA & rRNA)

10. Differences Between RNA and DNA & Types of RNA (mRNA, tRNA & rRNA)

In this lesson, you'll explore RNA structure and learn the central dogma of molecular biology. Along the way, you'll meet the three types of RNA and see how the cell uses them most effectively.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

Earning College Credit

Did you know… We have over 160 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Support