Sinopsis
Like large emeralds encrusted with gold, thousands of chrysalides (cocoons) hang from milkweed plants in southern Ontario. Within each of these chrysalides, a monarch butterfly caterpillar will undergo a metamorphosis to become an adult butterfly. This process requires much energy to fuel the tremendous changes that occur in a caterpillar’s physical appearance and abilities. All organisms require energy to survive. Cells in a eukaryotic organism contain organelles, such as the mitochondria shown below, that transform the energy in food into energy that can be used for various cellular processes. Without mitochondria, organisms such as the monarch caterpillar would not be able to perform the metabolic processes they need for metamorphosis. Metabolic processes involve all the chemical reactions that take place in cells, as well as the chemical reactions that need energy to transport molecules and build the cellular
structures necessary for all life processes. In this unit, you will learn about the chemical reactions that form molecules and see how the laws of thermodynamics govern all reactions between molecules. You will discover how special proteins are essential to metabolic processes in the cell. You will explore the series of metabolic reactions that take place in cells and learn how energy is transformed and used in these reactions. Finally, you will explore how the study of cell biology relates to your life and lifestyle.
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