Ch 27: Praxis General Science: Cell Biology

About This Chapter

This chapter consists of online video lessons that'll allow you to study cell biology in preparation for taking the Praxis General Science examination. Develop the ability to teach topics that include osmosis, diffusion and cell communication.

Praxis General Science: Cell Biology - Chapter Summary

If you'll soon take the Praxis General Science examination, review the fundamentals of cell biology in this chapter. Use its video lessons to help you remember the various uses for chemical energy and to promote your knowledge of cellular respiration and protein synthesis. The video lessons will also emphasize topics such as the components of the endomembrane system, the locations of mitochondria and the three kinds of RNA. Your study of this chapter will allow you to:

  • Get information about the structure of mitochondria and the nucleus
  • Describe the fluid mosaic model
  • Discover how molecules can be hydrophilic and hydrophobic
  • Learn more about active and passive cellular transport
  • List three kinds of endocytosis
  • Identify the location of a ribosome
  • Explain the functions of the endomembrane system
  • Describe the purpose of the cytoskeleton
  • Discuss the process of cellular communication

The lesson instructors are credentialed educators whose conversational deliveries can smooth the learning process as you get set to take the Praxis General Science examination. View the online video lessons with your mobile device, and use the pause function while you absorb the information. Jump among main subjects by using the video tags, which you'll find when you click the timeline link. The chapter includes worksheets, self-assessment quizzes and text transcripts. The bold terms within the transcripts can be further researched for greater clarification. Take the chapter or final examinations at any point throughout your study.

Praxis General Science: Cell Biology Chapter Objectives

On the Praxis General Science examination, you'll provide answers to 135 multiple-choice questions that span five content categories. You must complete the assessment in under two-and-a-half hours. During the Life Science content category of the computer-based examination, you'll put your knowledge of cell biology to use. Display what you've learned about the functions and structures of plant and animal cell membranes as well as active and passive transport, phospholipid bilayers and more. The Life Science category is worth 20% of the examination.

10 Lessons in Chapter 27: Praxis General Science: Cell Biology
Test your knowledge with a 30-question chapter practice test
Mitochondria Structure: Cristae, Matrix and Inner & Outer Membrane

1. Mitochondria Structure: Cristae, Matrix and Inner & Outer Membrane

If you want to make it through the day, you're going to need some energy. In this lesson, we'll learn about the organelle that supplies this energy, the mitochondrion, and why this cell structure appreciates the time you took to eat breakfast this morning!

Structure of the Nucleus: Nucleolus, Nuclear Membrane, and Nuclear Pores

2. Structure of the Nucleus: Nucleolus, Nuclear Membrane, and Nuclear Pores

In this lesson, we'll discuss the organization and importance of the nucleus in your cells. This is the membrane-bound structure responsible for containing all the genetic material essential to making you who you are.

The Fluid Mosaic Model of the Cell Membrane

3. The Fluid Mosaic Model of the Cell Membrane

In this lesson, we will discuss the components of the cell membrane and why the fluid mosaic model paints the best picture of its structure. We'll learn about the roles of the phospholipid bilayer, cholesterol, proteins and carbohydrates.

How a Phospholipid Bilayer Is Both Hydrophobic and Hydrophilic

4. How a Phospholipid Bilayer Is Both Hydrophobic and Hydrophilic

In this lesson, we will learn what gives phospholipids a dual personality. How can this molecule be both hydrophobic and hydrophilic, and why is this important to a cell?

Passive & Active Transport in Cells

5. Passive & Active Transport in Cells

In order for your cells to survive, nutrients and other substances must be allowed to move in and out across the cell membrane. Sometimes this requires energy (active transport), and sometimes it does not (passive transport).

Endocytosis and Exocytosis Across the Cell Membrane

6. Endocytosis and Exocytosis Across the Cell Membrane

In this lesson, we'll discover how some cells can eat, drink, and digest their dinner through the process of endocytosis and a structure called the lysosome. In addition, we'll learn how a cell can throw out the leftovers across the cell membrane during exocytosis.

The Ribosome: Structure, Function and Location

7. The Ribosome: Structure, Function and Location

The ribosome is the cellular structure responsible for decoding your DNA. In this lesson, we'll learn about ribosome structure, function and location - characteristics that make it a very good genetic translator.

The Endomembrane System: Functions & Components

8. The Endomembrane System: Functions & Components

In this lesson, we'll learn about the endomembrane system, which consists of the endoplasmic reticulum and the Golgi apparatus. This system is important in making, packaging, and shipping all sorts of goodies for the cell to use!

The Cytoskeleton: Microtubules and Microfilaments

9. The Cytoskeleton: Microtubules and Microfilaments

In this lesson, we'll learn about the cytoskeleton of your cells. This network of microtubules, intermediate filaments, and microfilaments helps different types of cells maintain a unique set of characteristics, including shape and movement.

An Overview of Cell Communication

10. An Overview of Cell Communication

Cellular communication is an important process that allows cells to pass signals to one another. In this video lesson, you will be introduced to the process of cellular communication, identifying the three steps of cellular signaling in organisms.

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

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