Login
Copyright

Ch 4: Holt McDougal Biology Chapter 4: Cells & Energy

About This Chapter

The Cells & Energy chapter of this Holt McDougal Biology Companion Course helps students learn the essential lessons associated with energy production and cellular traits. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Cells & Energy textbook chapter.

How It Works:

  • Identify the lessons in the Holt McDougal Cells & Energy chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the energy and cell science topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • Muscle metabolism
  • What chlorophyll is
  • The process of photosynthesis
  • How cells transfer energy
  • The citric acid cycle and electron transport chain
  • The difference between photosynthesis and cellular respiration
  • How lactic acid fermentation and alcoholic fermentation differ

Holt McDougal is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.

11 Lessons in Chapter 4: Holt McDougal Biology Chapter 4: Cells & Energy
Muscle Metabolism: Synthesis of ATP

1. Muscle Metabolism: Synthesis of ATP

Did you know our muscles use billions of molecules every second to contract? This lesson describes the different metabolic processes by which ATP is generated by the muscle cell. Examples are utilized to define glycolysis, the citric acid cycle and oxidative phosphorylation.

Chemosynthesis: Definition & Equation

2. Chemosynthesis: Definition & Equation

This lesson introduces the concept of chemosynthesis. It explains that energy is necessary for all life and provides a description of the chemosynthetic process. The lesson also includes examples of where chemosynthesis occurs in nature along with a brief quiz.

Chlorophyll: Absorbing Light Energy for Photosynthesis

3. 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!

Photosynthesis: Biology Lab

4. Photosynthesis: Biology Lab

Plants and other organisms that have the pigment chlorophyll can do something that no other living creature can - capture light energy from the sun and use it to make chemical energy through photosynthesis. In this lab, we'll see how we can set up an experiment to measure the rate of this important process.

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

5. 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

6. 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.

Cellular Respiration: Energy Transfer in Cells

7. 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.

The Citric Acid (Krebs) Cycle: Products and Steps

8. 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

9. 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.

Comparing & Contrasting Cellular Respiration & Photosynthesis

10. Comparing & Contrasting Cellular Respiration & Photosynthesis

In this lesson we will compare and contrast respiration and photosynthesis by considering the major steps occurring in each process, where these processes take place, and the organisms that use these forms of metabolism.

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.

Earning College Credit

Did you know… We have over 79 college courses that prepare you to earn credit by exam that is accepted by over 2,000 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Other Chapters

Other chapters within the Holt McDougal Biology: Online Textbook Help course

Support