Ch 25: Praxis Middle School Science: Cell Biology

About This Chapter

Do you need some review of cell biology for the Praxis Middle School Science test? Our expert instructors have put together video lessons with you in mind. Use our quizzes after each lesson to help you confirm what you know so you're ready for anything on test day.

Praxis Middle School Science: Cell Biology - Chapter Summary

Whether you feel somewhat confident about cell biology or you need a refresher on the subject before taking the Praxis Middle School Science exam, you'll benefit from reviewing the video lessons in this chapter. They're brief, succinct and engaging. They're also easy to navigate so you can jump past topics you don't want to review and concentrate on the topics you do. You can watch them as many times as you need, anytime, anywhere. The cell biology topics reviewed in the lessons include:

  • Structure of cellular components like mitochondria, nuclei and ribosomes
  • The fluid mosaic model of the cellular membrane
  • Properties of phospholipid bilayers
  • Cellular transport (both active and passive varieties)
  • Structure and function of the endomembrane system
  • Microelements of the cytoskeleton
  • Basics of cell signaling

Take the short quizzes after each lesson to help boost your confidence in your comprehension and retention or identify any weak spots. If you have questions, you can use the 'ask-an-expert' feature to submit them.

Objectives of the Praxis Middle School Science: Cell Biology Chapter

Most States require aspiring middle school science teachers to pass the Praxis Middle School Science test, which is a computer-based assessment that is divided into 6 major sections. Cell biology topics are covered on the life sciences section of the test, which constitutes 24% of the 125 total questions. The topics covered in our video lessons in this chapter have been chosen to correlate with questions you're likely to encounter on the actual test.

Creators of the Praxis indicate that they want to ensure that test-takers understand structure and function of cell membranes and organelles, the relationship between different levels of organization (from the cell to the organ system level) and the important differences between cell biology of prokaryotes and eukaryotes. You also may be tested on key differences between major cellular types like muscle, nerve and epithelial cells.

11 Lessons in Chapter 25: Praxis Middle School 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?

Active & Passive Transport in Cells

5. Active & Passive Transport in Cells

Every second of every day, your cells are restocked with vital nutrients while getting rid of waste products. How does all this go on, you ask? Find out in this lesson on active and passive transport in cells.

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.

Prokaryotes & Eukaryotes: Definition & Examples

11. Prokaryotes & Eukaryotes: Definition & Examples

Every living organism can be categorized as either a prokaryote or a eukaryote. There are many different examples of both types of organisms. Learn about prokaryotes and eukaryotes, and test your knowledge by answering the quiz questions.

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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