Ch 6: MCAS STE Biology: Cellular Respiration & Photosynthesis

About This Chapter

In this chapter, you will receive a comprehensive review of cellular respiration and photosynthesis. Watch these videos so you can feel ready and able to answer related questions on the MCAS STE Biology exam.

MCAS STE Biology: Cellular Respiration & Photosynthesis - Chapter Summary

Let us help you review the particular processes involved in cellular respiration and photosynthesis with the video lessons in this chapter. After you complete all of the lessons, you will have examined:

  • Cellular respiration
  • Oxidation and reduction reactions in metabolism
  • Redox reactions and electron carriers in cellular respiration
  • Glycolysis pathway
  • The Krebs cycle
  • The electron transport chain
  • Photosynthesis and chlorophyll
  • Photolysis and the light reactions
  • The Calvin-Benson Cycle

The lessons contain short videos to help illustrate the information and provide real life examples of the material. There is a clickable timeline below each video for you to easily return to a particular portion of the lesson if you would like to review it. Take the self-assessment quiz at the end of each lesson to test your knowledge and see how questions may appear on the exam.

MCAS STE Biology: Cellular Respiration & Photosynthesis Chapter Objectives

The MCAS STE Biology exam is taken by high school students in Massachusetts to asses their mastery of biology according to the Massachusetts Curriculum Framework. The exam is divided into five main content areas, and the material covered in this chapter prepares you for questions within the biochemistry and cell biology area; this content area account for 25% of your total test score. You may even find questions related to photosynthesis in the ecology content area, which accounts for 20% of the total score.

The MCAS STE Biology exam is one of four standardized Science and Technology/Engineering tests taken by high school students in Massachusetts. Students need to score a 220 or higher on one of the four STE exams to qualify for graduation. The MCAS STE Biology exam consists of 40 multiple-choice questions and 5 open-ended response questions.

11 Lessons in Chapter 6: MCAS STE Biology: Cellular Respiration & Photosynthesis
Test your knowledge with a 30-question chapter practice test
Cellular Respiration: Energy Transfer in Cells

1. 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.

Oxidation & Reduction Reactions in the Metabolism: Process & Significance

2. Oxidation & Reduction Reactions in the Metabolism: Process & Significance

Oxidation and reduction reactions, collectively known as redox reactions, take place in body cells and are important for the production of energy, namely ATP. Oxidation involves the loss of electrons and reduction involves the gain of electrons.

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

3. 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

4. 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

5. 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

6. 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.

Photosynthesis: Definition & Reactions

7. 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.

The Relationship Between Photosynthesis & Cellular Respiration

8. The Relationship Between Photosynthesis & Cellular Respiration

The ecosystems of the world are generally in balance with one another. Animals and plants live in mutually beneficial relationships. We will examine one of these relationships: the relationship between photosynthesis and cellular respiration.

Chlorophyll: Absorbing Light Energy for Photosynthesis

9. 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

10. 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

11. 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.

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.
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