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Ch 13: Praxis Biology & General Science: Biological Molecules and Processes

About This Chapter

Use our video lessons to learn about biological molecules and processes. Prepare for the Praxis II Biology and General Science exam with these lessons on organic molecules, proteins, enzymes and lipids.

Praxis Biology & General Science: Biological Molecules and Processes - Chapter Summary

The video lessons in this chapter can help you prepare for the Praxis II Biology and General Science test. You'll get an overview of the atoms that make up organic molecules and find out about the different types of functional groups. This chapter will introduce you to monomers and polymers, and it will explain the differences between man-made and natural polymers. You can also find out what enzymes do and why some enzymes need helpers to perform their functions. After watching all of the videos in this chapter you'll be familiar with:

  • Structure and function of carbohydrates and lipids
  • Protein function and structure
  • Amino acids and peptide bonds
  • Categories of amino acids
  • Cofactors, coenzymes and prosthetic groups
  • Enzymatic reactions
  • Cooperative binding

Subject matter experts teach these lessons on biological molecules and processes. Each lesson has a variety of features that can aid in your test preparation. You'll find video tags that take you back to major points in the lessons and self-assessment quizzes that you can use to test your knowledge of the materials.

Praxis Biology & General Science: Biological Molecules and Processes Objectives

This chapter on biological processes and molecules is part of the molecular and cellular biology content area of the Praxis II Biology and General Science. You'll see 18 questions covering the topics listed above and related concepts in this content area, which is about 15% of the entire test. An additional seven content areas make up the balance of the test, which assesses your knowledge of biology and general science and your readiness to teach these topics to secondary students. All 120 questions on the test are in multiple-choice format.

12 Lessons in Chapter 13: Praxis Biology & General Science: Biological Molecules and Processes
Test your knowledge with a 30-question chapter practice test
Introduction to Organic Molecules I: Functional Groups

1. Introduction to Organic Molecules I: Functional Groups

If you've ever wondered what gives vinegar that sour flavor, you may not realize that you have contemplated functional groups. View this lesson for an introduction to organic chemistry, functional groups and how they are part of your daily life.

Introduction to Organic Molecules II: Monomers and Polymers

2. Introduction to Organic Molecules II: Monomers and Polymers

From everyday man-made items like milk jugs and styrofoam to natural proteins and plant materials, the world is full of polymers! Check out this lesson to learn how polymers are constructed on a molecular level.

Structure and Function of Carbohydrates

3. 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

4. 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

5. 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 II: Amino Acids, Polymerization and Peptide Bonds

6. 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 III: Structure and Characteristics of the 20 Amino Acids

7. 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 IV: Primary, Secondary, Tertiary and Quaternary Structure

8. 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.

Function of Enzymes: Substrate, Active Site & Activation Energy

9. Function of Enzymes: Substrate, Active Site & Activation Energy

In this lesson, we'll learn how enzymes function to lower the activation energy of a chemical reaction. Enzymes bind to their substrates to perform all kinds of important and essential cellular processes, as well as processes that help you enjoy a slice of pizza!

Enzyme Activity & Inhibition: Structure, Substrates, pH & Temperature

10. Enzyme Activity & Inhibition: Structure, Substrates, pH & Temperature

Enzymes appreciate the right working conditions. Can you blame them? We all work best in the correct environment. In this lesson, we'll learn how substrate concentration, temperature, and pH affect enzyme activity and structure.

Coenzymes, Cofactors & Prosthetic Groups: Function and Interactions

11. Coenzymes, Cofactors & Prosthetic Groups: Function and Interactions

Some enzymes require helpers to recognize a substrate or complete a reaction. These helpers include cofactors, coenzymes, and prosthetic groups, which are required for some enzymes' functions.

Enzymatic Reactions: Inhibition and Regulation

12. Enzymatic Reactions: Inhibition and Regulation

Enzymes are generally not allowed to run uncontrolled in a cell. While they are useful in catalyzing reactions, there is a time and place for everything. In this lesson, we'll discuss enzyme activators and inhibitors that regulate these reactions positively and negatively, respectively.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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