About This Chapter
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.
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.
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.
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.
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.
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.
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.
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.
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.
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!
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.
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.
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Other chapters within the MCAS - Science & Technology-Engineering - Biology: Test Prep & Practice course
- MCAS STE Biology: Chemistry of Life
- MCAS STE Biology: Enzymatic Biochemistry
- MCAS STE Biology: Organelles
- MCAS STE Biology: Cellular Structure & Transport
- MCAS STE Biology: Classification & Evolution
- MCAS STE Biology: Cell Growth & Reproduction
- MCAS STE Biology: DNA Replication
- MCAS STE Biology: Transcription & Translation
- MCAS STE Biology: Genetics & Heredity
- MCAS STE Biology: Digestive & Circulatory Systems
- MCAS STE Biology: Nervous & Endocrine Systems
- MCAS STE Biology: Respiratory & Musculoskeletal Systems
- MCAS STE Biology: The Reproductive System
- MCAS STE Biology: Evolution & Biodiversity
- MCAS STE Biology: Ecology
- MCAS STE Biology: Scientific Method & Inquiry
- MCAS STE Biology: The Science Lab
- MCAS STE Biology: Using Mathematics in Science
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