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Ch 12: Photosynthesis & Respiration

About This Chapter

Review photosynthesis and respiration topics with this mobile-friendly collection of biology study resources. The chapter can benefit anyone who needs to improve their grades, catch up on missed class information or prepare for upcoming exams.

Photosynthesis & Respiration - Chapter Summary

This collection of short and informative biology lessons examines photosynthesis and respiration. Inside the chapter, our expert instructors will help you outline several biological processes, including the citric acid cycle and the Calvin-Benson cycle. You'll also take a look at the purpose and functions of carbon fixation, photolysis, aerobic respiration and more. By the end of the chapter, you should be able to:

  • Understand photolysis and the light reactions of photosynthesis
  • Outline the steps of the Calvin-Benson cycle, phosphorylation, the electron transport chain and the citric acid cycle
  • Identify the enzymzes that are involved in carbon fixation
  • Recognize alternative methods that plants use to produce energy
  • Name factors that can limit photosynthesis
  • Explain the three primary steps of plant respiration
  • Know the equations for aerobic and anaerobic respiration
  • Differentiate between photosynthesis and chemosynthesis

This self-paced chapter comes with interactive self-assessment quizzes to help you gauge your understanding of the material. If you need to review a certain topic again, simply use your course Dashboard feature to locate it. Lesson transcripts are also available to print for offline study. To make your studying experience flexible and convenient, we've made the chapter material available at any time of day or night and accessible on any computer or mobile device.

12 Lessons in Chapter 12: Photosynthesis & Respiration
Test your knowledge with a 30-question chapter practice test
Photolysis and the Light Reactions: Definitions, Steps, Reactants & Products

1. 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

2. 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.

Phosphorylation: Definition, Types & Steps

3. Phosphorylation: Definition, Types & Steps

Phosphorylation, or the addition of inorganic phosphate, is an important process within a biological system. In this article we will define phosphorylation, explore several types, and go over the steps involved in each.

Carbon Fixation in Photosynthesis: Definition & Reactions

4. Carbon Fixation in Photosynthesis: Definition & Reactions

In this lesson, you will discover what carbon fixation means, when it occurs and what enzyme is involved. The lesson will discuss where the process of carbon fixation falls in photosynthesis as well as give a brief idea of a process by which carbon can be freed from fixation.

Alternative Methods of Carbon Fixation in Plants

5. Alternative Methods of Carbon Fixation in Plants

What happens to plants when it gets too hot or dry for the normal cycles of creating energy to keep functioning? In this lesson, we are going to check out a couple alternative solutions adapted by plants to maintain energy production when the need arises.

Limiting Factors of Photosynthesis

6. Limiting Factors of Photosynthesis

In this lesson, you'll learn about the major factors that can limit the rate of photosynthesis: carbon dioxide level, light intensity, and temperature. Test what you learned with the quiz following the lesson.

Plant Respiration: Definition & Process

7. Plant Respiration: Definition & Process

Cellular respiration is essential to the survival of all plants and animals. In this lesson, we'll look at what plant respiration is, why it is important, and the three main phases involved in the process.

Anaerobic Respiration: Definition, Equation & Examples

8. Anaerobic Respiration: Definition, Equation & Examples

Many organisms are capable of undergoing anaerobic respiration. In some cases, it's a 'backup plan' when oxygen is absent, and in other cases, they thrive that way. Here we will investigate what anaerobic respiration is, the equation and examples of it at work.

Aerobic Respiration: Definition, Steps, Products & Equation

9. Aerobic Respiration: Definition, Steps, Products & Equation

Aerobic respiration is the process most living things undergo to use food energy. Here, we will investigate the definition, the steps of the process, what goes in and what comes out of the process, and the chemical formula. Get ready to breathe!

Glycolysis & the Citric Acid Cycle

10. Glycolysis & the Citric Acid Cycle

How does food actually become energy? Through cellular respiration! In this lesson we will examine two main components of respiration and discover exactly how they break down food into useable energy.

The Electron Transport Chain: Products and Steps

11. 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.

Differences Between Chemosynthesis & Photosynthesis

12. Differences Between Chemosynthesis & Photosynthesis

We all make food in different ways, and the same goes for bacteria, plants, and algae. This lesson goes over the two ways by which such organisms produce food: chemosynthesis and photosynthesis.

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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