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Ch 4: Matter & Energy Flow in Organisms

About This Chapter

Check out this chapter on matter and energy flow in organisms if you're struggling to complete a homework assignment or prepare for a test. Our well-designed lessons and multiple-choice quizzes are mobile-friendly and make it fun to learn and review these topics at your leisure.

Matter & Energy Flow in Organisms - Chapter Summary

Our instructors present subjects related to matter and energy flow in organisms in this engaging chapter. Written with ease of understanding in mind, these lessons cover photosynthesis, chlorophyll, energy transformation and cellular respiration. After finishing this chapter, you should be able to:

  • Outline the major elements in biological molecules
  • Define metabolic pathway with examples
  • Provide examples of anabolism and catabolism
  • Discuss the function of enzymes
  • Detail the conditional and structural factors that impact enzyme activity
  • Describe the effects of temperature and pH on enzyme activity
  • Identify the effects that enzyme concentration have on enzyme activity

When you review this chapter, you'll have access to short lessons, self-assessment quizzes and help from an expert instructor if you need it. All of our learning materials are accessible on any computer or mobile device 24 hours a day for your convenience. The Dashboard provides a way for you to keep an eye on your progress through the chapter and submit any questions that come up along the way.

12 Lessons in Chapter 4: Matter & Energy Flow in Organisms
Test your knowledge with a 30-question chapter practice test
Photosynthesis: Definition & Reactions

1. Photosynthesis: Definition & Reactions

Some people may falsely assume plants to be weaker than animals. However, plants and a few other organisms harness light energy from the sun to feed the rest of us. This lesson will introduce you to how they do it.

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!

Energy Transformation: Photosynthesis vs. Cellular Respiration

3. Energy Transformation: Photosynthesis vs. Cellular Respiration

In this lesson, explore how energy is converted between different forms during two biological processes: photosynthesis and cellular respiration. Learn how energy from the sun is harvested by plants and ultimately gives us the energy we need.

Cellular Respiration: Energy Transfer in Cells

4. 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.

Major Elements in Biological Molecules: Proteins, Nucleic Acids, Carbohydrates & Lipids

5. Major Elements in Biological Molecules: Proteins, Nucleic Acids, Carbohydrates & Lipids

Bacterial cells have complex macromolecules built from simple molecules. In this lesson, we will look at the major elements in the building blocks of proteins, nucleic acids, carbohydrates, and lipids.

What is a Metabolic Pathway? - Definition & Example

6. What is a Metabolic Pathway? - Definition & Example

In this lesson, you'll learn about metabolic pathways, chemical reactions that none of us could possibly live without. You'll also explore some examples of metabolic pathways.

Anabolism and Catabolism: Definitions & Examples

7. Anabolism and Catabolism: Definitions & Examples

Metabolism breaks down large molecules like food into usable energy. This energy drives bodily processes critical to survival. In this video lesson, you will learn about the two forms of metabolism that break down and build up molecules and see examples of each.

Function of Enzymes: Substrate, Active Site & Activation Energy

8. Function of Enzymes: Substrate, Active Site & Activation Energy

In this lesson, we'll learn how enzymes function to lower the activation energy of a chemical reaction. Enzymes bind to their substrates to perform all kinds of important and essential cellular processes, as well as processes that help you enjoy a slice of pizza!

Structural & Conditional Factors that Impact Enzyme Activity

9. Structural & Conditional Factors that Impact Enzyme Activity

In this lesson, we'll be learning how structural and conditional factors such as ionic concentrations affect enzyme activity through protein organization. We'll also look at how to analyze experiments designed to demonstrate this property.

Effect of Temperature on Enzyme Activity

10. Effect of Temperature on Enzyme Activity

In this lesson we will explore what an enzyme is, how an enzyme functions and then explore in what way temperature may affect the activity of an enzyme.

Effect of Enzyme Concentration on Enzyme Activity

11. Effect of Enzyme Concentration on Enzyme Activity

In this lesson, we'll explore what an enzyme is, what an enzymatic reaction is and what happens to the rate of a reaction if you add more enzymes to a solution.

Effect of pH on Enzyme Activity

12. Effect of pH on Enzyme Activity

Let's explore the relationship between enzymes and pH. Learn how enzymes function, what pH really means, and how the two interact to result in optimal enzymatic activity.

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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