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Core - Cell Biology

    Chapter 4

    Introduction to Metabolism

    4.1 : Overview of Metabolism01:40

    4.1 : Overview of Metabolism

    Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one ...

    29.5K views
    4.2 : Carbohydrate Metabolism01:36

    4.2 : Carbohydrate Metabolism

    Carbohydrates are polymers composed of molecules containing atoms of carbon, hydrogen and oxygen. One gram of carbohydrate can provide four kilo-calories ...

    10.8K views
    4.3 : Glycolysis: Preparatory Phase01:21

    4.3 : Glycolysis: Preparatory Phase

    In cellular metabolism (the complete breakdown of glucose to extract energy),  glycolysis is the first step. Glycolysis takes place in the cytoplasm ...

    13.2K views
    4.4 : Glycolysis: Pay-off Phase01:25

    4.4 : Glycolysis: Pay-off Phase

    So far, glycolysis has cost the cell two ATP molecules and produced two small, three-carbon sugar molecules. These molecules will proceed through the ...

    9.7K views
    4.5 : Fates of Pyruvate01:20

    4.5 : Fates of Pyruvate

    Pyruvate is the end product of glycolysis, where glucose is oxidized to pyruvate, simultaneously reducing NAD+ to NADH. Two molecules of ATP are also ...

    8.3K views
    4.6 : Role of Reduced Coenzymes NADH and FADH₂01:29

    4.6 : Role of Reduced Coenzymes NADH and FADH₂

    The energy released from the breakdown of the chemical bonds within nutrients can be stored either through the reduction of electron carriers or in the ...

    11.1K views
    4.7 : Overview of Nitrogen Metabolism01:20

    4.7 : Overview of Nitrogen Metabolism

    Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is ...

    7.8K views
    4.8 : Overview of Fatty Acid Metabolism01:28

    4.8 : Overview of Fatty Acid Metabolism

    Lipids also are sources of energy that power cellular processes. Like carbohydrates, lipids are composed of carbon, hydrogen, and oxygen, but these atoms ...

    30.2K views
    4.9 : Sugars as Energy Storage Molecules01:10

    4.9 : Sugars as Energy Storage Molecules

    Sugar (a simple carbohydrate) metabolism (chemical reactions) is a classic example of the many cellular processes that use and produce energy. Living ...

    8.3K views
    4.10 : Fats as Energy Storage Molecules01:06

    4.10 : Fats as Energy Storage Molecules

    Triglycerides are a form of long-term energy storage molecules. They are made of glycerol and three fatty acids. To obtain energy from fat, triglycerides ...

    24.8K views
    4.11 : Regulation of Metabolism01:19

    4.11 : Regulation of Metabolism

    Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands ...

    9.2K views
    4.12 : Positive and Negative Feedback Loops01:18

    4.12 : Positive and Negative Feedback Loops

    Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples ...

    17.0K views
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