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Ch 11: Praxis Biology: Cell Structures and Functions

About This Chapter

Use our video lessons and quizzes to prepare for the Praxis Biology exam. In this chapter, you can learn about the structures within a cell and their purpose.

Praxis Biology: Cell Structures and Functions - Chapter Summary

The lessons in this chapter will teach you about types of cells, such as eukaryotic and prokaryotic cells. You will look at the structure of cells, including the nucleus and the cell wall. Other lessons cover the function of each cell part. By the end of these video lessons, you will have an understanding of topics including:

  • How the phospholipid bilayer is both hydrophobic and hydrophilic
  • The fluid mosaic model of the cell membrane
  • Plant cell structures
  • Passive and active transport in cells
  • Structure, location and function of the ribosome
  • The endomembrane system
  • Osmolarity and water potential
  • Cell signaling

Experienced instructors guide you through each topic, using examples to clarify their points. You can prepare for the exam by testing your knowledge with the quizzes that follow each lesson, and there are links that make it easy to review key items on the video.

Praxis Biology: Cell Structures and Functions Chapter Objectives

In many states, candidates for teacher certification must pass Praxis examinations for the subjects they wish to teach. The biology content knowledge exam has 150 multiple-choice questions and assesses test-takers for competency to teach the subject at the secondary school level. There is a two-hour time limit, and the exam can be administered as a paper test or on computer. The Praxis Biology exam has six sections, and the material taught in this chapter is in section II, Molecular and Cellular Biology. This section, with 38 questions, comprises about 25% of the test.

14 Lessons in Chapter 11: Praxis Biology: Cell Structures and Functions
Test your knowledge with a 30-question chapter practice test
Eukaryotic and Prokaryotic Cells: Similarities and Differences

1. Eukaryotic and Prokaryotic Cells: Similarities and Differences

In this lesson, we discuss the similarities and differences between the eukaryotic cells of your body and prokaryotic cells such as bacteria. Eukaryotes organize different functions within specialized membrane-bound compartments called organelles. These structures do not exist in prokaryotes.

Eukaryotic and Prokaryotic Cell Flashcards

Eukaryotic and Prokaryotic Cell Flashcards

In this set of flashcards, you'll get to know eukaryotic and prokaryotic cells. By going through this set you'll be able to identify different cells as eukaryotic or prokaryotic based on their cell structures.

Bacterial Cell Walls: Structure, Function & Types

3. Bacterial Cell Walls: Structure, Function & Types

The bacterial cell wall has to be strong to prevent cell lysis but also porous to allow transport across the cell membrane. In this lesson, we will examine the structure of the bacterial cell wall and how it accomplishes both of these crucial tasks.

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?

The Fluid Mosaic Model of the Cell Membrane

5. 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.

Plant Cell Structures: The Cell Wall and Central Vacuole

6. Plant Cell Structures: The Cell Wall and Central Vacuole

In this lesson, we'll talk about some of the things that make plant cells so different from our cells. In addition to being mean, green photosynthesizing machines, plant cells have cell walls and central vacuoles to make them unique!

Passive Transport in Cells: Simple and Facilitated Diffusion & Osmosis

7. Passive Transport in Cells: Simple and Facilitated Diffusion & Osmosis

A cell membrane is selectively permeable - not permeable to everything. In this lesson, we'll talk about methods of passive transport along a concentration gradient, including simple and facilitated diffusion and osmosis.

Active Transport in Cells: Definition & Examples

8. Active Transport in Cells: Definition & Examples

In this lesson, we'll learn how substances are transported across the cell membrane against the concentration gradient. This might seem like an uphill battle for the cell, but all it takes is a little chemical energy and a few integral membrane proteins to kick off some active transport!

Endocytosis and Exocytosis Across the Cell Membrane

9. 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.

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

10. 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 Ribosome: Structure, Function and Location

11. 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

12. 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

13. 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.

The Mechanisms of Hormone Action

14. The Mechanisms of Hormone Action

To keep everything regulated, your body constantly needs to send messages to different cells. It does this by using hormones. In this lesson we'll look at how hormones work and what they do.

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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