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Ch 14: Praxis Biology & General Science: Cellular Energy Flow

About This Chapter

Our video lessons can teach you about the different parts of the chloroplast and why chlorophyll is important. You can learn about photosynthesis, cellular respiration and the electron transport chain to help you prepare for the Praxis II Biology and General Science exam.

Praxis Biology & General Science: Cellular Energy Flow - Chapter Summary

Apply the concepts learned in this chapter to enhance your understanding of cellular energy flow and prepare for the Praxis II Biology and General Science test. Make your way through engaging video lessons on the light and dark reactions involved in photosynthesis and the importance of cellular respiration. You'll also get details on glycolysis, the Krebs or citric acid cycle and the electron transport chain that make up the cellular respiration process. The lessons in this chapter cover the following concepts:

  • Structure and parts of the chloroplast
  • Chlorophyll's role in photosynthesis
  • How photolysis is used in light reactions
  • Steps in the Calvin cycle of photosynthesis
  • Structure of mitochondria
  • Reactions and carriers in the cellular respiration process
  • Stages of cellular respiration
  • Lactic acid and alcoholic fermentation
  • Chemosynthesis

These concise lessons are led by experts in the field of biology who provide detailed descriptions and examples of the processes that are a part of the cellular energy flow. Self-assessment quizzes accompany each lesson and are similar in format to the questions you'll see on the Praxis II test.

Praxis Biology & General Science: Cellular Energy Flow Objectives

Many states use the Praxis II Biology and General Science test to evaluate the readiness of teacher candidates to teach biology and general science to students. The 120 questions on the test cover eight different content areas. Questions on cellular energy flow are part of the molecular and cellular biology content area, which has 18 questions and makes up about 15% of the entire test.

11 Lessons in Chapter 14: Praxis Biology & General Science: Cellular Energy Flow
Test your knowledge with a 30-question chapter practice test
Chloroplast Structure: Chlorophyll, Stroma, Thylakoid, and Grana

1. Chloroplast Structure: Chlorophyll, Stroma, Thylakoid, and Grana

In this lesson, we'll explore the parts of the chloroplast, such as the thylakoids and stroma, that make a chloroplast the perfect place for conducting photosynthesis in plant cells.

Chlorophyll: Absorbing Light Energy for Photosynthesis

2. Chlorophyll: Absorbing Light Energy for Photosynthesis

Plants are clean, green, photosynthesizing machines. Using a specialized pigment called chlorophyll, plants are able to soak up energy from the sun and turn it into food. In this lesson, we'll start to learn why chlorophyll literally gets excited about a sunny day!

Photolysis and the Light Reactions: Definitions, Steps, Reactants & Products

3. Photolysis and the Light Reactions: Definitions, Steps, Reactants & Products

In this lesson, we'll learn how electrons get excited during the light-dependent reactions of photosynthesis, jumping off photosystem reaction centers like they were trampolines! In addition, we'll learn how the splitting of water creates reactants for this part of photosynthesis while creating a little fresh air for us.

Dark Reactions of Photosynthesis: The Calvin-Benson Cycle

4. Dark Reactions of Photosynthesis: The Calvin-Benson Cycle

Photosynthesis starts out using the energy from sunlight to get things started, but it ends with the dark reactions, which don't need sunshine to complete sugar production. In the Calvin cycle, ATP and NADPH from the light reactions are used to produce sugars.

Mitochondria Structure: Cristae, Matrix and Inner & Outer Membrane

5. 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!

Cellular Respiration: Energy Transfer in Cells

6. Cellular Respiration: Energy Transfer in Cells

Watch this short video to learn the basics about converting organic compounds into ATP, also known as cellular respiration. We'll look at an overview of the process.

Redox Reactions & Electron Carriers in Cellular Respiration: Definitions and Examples

7. Redox Reactions & Electron Carriers in Cellular Respiration: Definitions and Examples

Redox reactions play an important role in cellular respiration. In this lesson, you will see how NAD and FAD are used as electron carriers to temporarily store energy during cellular respiration.

Glycolysis Pathway: Steps, Products & Importance

8. Glycolysis Pathway: Steps, Products & Importance

Cellular respiration creates chemical energy in the form of ATP from the food we eat and the air we breathe. In this lesson, we'll learn about the first part of this process, glycolysis.

The Citric Acid (Krebs) Cycle: Products and Steps

9. The Citric Acid (Krebs) Cycle: Products and Steps

In this lesson, we return to the process of cellular respiration for the second act of creating energy from food. In this act, products from glycolysis feed into the next stage, the citric acid cycle.

The Electron Transport Chain: Products and Steps

10. The Electron Transport Chain: Products and Steps

In this lesson, we'll learn about the finale of cellular respiration. The electron transport chain uses products from the first two acts of glycolysis and the citric acid cycle to complete the chemical reaction that turns our food into usable cellular energy.

Lactic Acid & Alcoholic Fermentation: Comparison, Contrast & Examples

11. Lactic Acid & Alcoholic Fermentation: Comparison, Contrast & Examples

When in an anaerobic environment, some cells can use glycolysis and fermentation to keep producing ATP. Lactic acid fermentation happens in our muscle cells when we are exercising feverishly, while alcoholic fermentation is used in yeast cells and is what leads to beer, bread, and wine.

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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