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Questions and Answers
Which elements are the most common in the living body?
Which elements are the most common in the living body?
- Carbon, Sodium, Oxygen, Phosphorous
- Sodium, Potassium, Calcium, Magnesium
- Carbon, Hydrogen, Oxygen & Nitrogen (correct)
- Iron, Chlorine, Phosphorous, Sulphur
What are the two categories of chemical compounds that build up living matter?
What are the two categories of chemical compounds that build up living matter?
- Metallic compounds and non-metallic compounds
- Polar compounds and non-polar compounds
- Ionic compounds and covalent compounds
- Organic compounds and inorganic compounds (correct)
Which compounds are known as organic compounds?
Which compounds are known as organic compounds?
- Compounds containing oxygen
- Compounds containing carbon (correct)
- Compounds containing hydrogen
- Compounds containing nitrogen
What are the four types of biological molecules mentioned in the text?
What are the four types of biological molecules mentioned in the text?
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What are some examples of inorganic molecules essential for the maintenance of life?
What are some examples of inorganic molecules essential for the maintenance of life?
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Study Notes
Elements in the Living Body
- Oxygen (O), carbon (C), hydrogen (H), and nitrogen (N) are the most common elements in the living body, making up about 99% of the body's mass.
Categories of Chemical Compounds
- The two categories of chemical compounds that build up living matter are organic and inorganic compounds.
Organic Compounds
- Organic compounds are molecules that contain carbon (C) and hydrogen (H) atoms, and may also contain oxygen (O), nitrogen (N), and other elements.
Biological Molecules
- The four types of biological molecules mentioned in the text are carbohydrates, proteins, lipids, and nucleic acids.
Inorganic Molecules
- Examples of inorganic molecules essential for the maintenance of life include water (H2O), salts, and minerals like calcium (Ca) and phosphorus (P).
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