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Questions and Answers
Match the following elements with their presence as essential elements in the human body:
Match the following elements with their presence as essential elements in the human body:
Sulphur = Essential for the survival of organisms Phosphorous = Essential for the survival of organisms Sodium = Essential for the survival of organisms Potassium = Essential for the survival of organisms
Match the following categories of compounds with their composition:
Match the following categories of compounds with their composition:
Organic compounds = Contain carbon Inorganic compounds = Do not contain carbon Biological molecules = Build up living matter Water, minerals and gasses = Essential for the maintenance of life
Match the following biological molecules with their types:
Match the following biological molecules with their types:
Carbohydrates = Type of biological molecule Proteins = Type of biological molecule Lipids = Type of biological molecule Nucleic acids = Type of biological molecule
Match the following percentages with their main elements in the human body (mass basis):
Match the following percentages with their main elements in the human body (mass basis):
Match the following compounds with their classifications:
Match the following compounds with their classifications:
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Study Notes
Elements Essential in the Human Body
- Carbon, Oxygen, Nitrogen, and Hydrogen are essential elements in the human body
Categories of Compounds by Composition
- Carbohydrates: composed of Carbon, Hydrogen, and Oxygen
- Proteins: composed of Carbon, Hydrogen, Oxygen, and Nitrogen
- Nucleic Acids: composed of Carbon, Hydrogen, Oxygen, Nitrogen, and Phosphorus
Biological Molecules by Type
- Carbohydrates: examples include sugars, starches, and fibers
- Proteins: examples include enzymes, hormones, and structural components
- Nucleic Acids: examples include DNA and RNA
Main Elements in the Human Body by Percentage (Mass Basis)
- Oxygen: approximately 65% of the human body's mass
- Carbon: approximately 18% of the human body's mass
- Hydrogen: approximately 10% of the human body's mass
- Nitrogen: approximately 3% of the human body's mass
Compounds by Classification
- Inorganic compounds: include water, salts, and minerals
- Organic compounds: include carbohydrates, proteins, and nucleic acids
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