Podcast
Questions and Answers
What are the bodies of all organisms composed of?
What are the bodies of all organisms composed of?
Variety of chemical compounds
How are chemical compounds formed?
How are chemical compounds formed?
Bonding of naturally existing elements
How many elements are present in the living body out of the 92 elements found in nature?
How many elements are present in the living body out of the 92 elements found in nature?
About 25
What are the four most common elements in the living body?
What are the four most common elements in the living body?
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What are the other elements besides the four most common ones that are essential for the survival of organisms?
What are the other elements besides the four most common ones that are essential for the survival of organisms?
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What are the two categories that chemical compounds that build up living matter can be divided into?
What are the two categories that chemical compounds that build up living matter can be divided into?
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Organic compounds are compounds that contain Carbon.
Organic compounds are compounds that contain Carbon.
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Inorganic compounds are compounds that do not contain Carbon.
Inorganic compounds are compounds that do not contain Carbon.
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Which are some examples of inorganic compounds?
Which are some examples of inorganic compounds?
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What are the organic compounds that build up the living body or living matter known as?
What are the organic compounds that build up the living body or living matter known as?
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Which of the following are biomolecule categories?
Which of the following are biomolecule categories?
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Study Notes
Chemical Basis of Life
- Organisms' bodies are composed of various chemical compounds formed by bonding of elements.
- Only about 25 elements are found in living organisms, out of 92 elements in nature. These are present in diverse forms
- The four most common elements in living organisms are Carbon, Hydrogen, Oxygen, and Nitrogen.
- Other elements like Sulphur, Phosphorous, Sodium, Potassium, Calcium, Magnesium, Iron and Chlorine are also essential for organisms.
- Figure 1.1 shows the percentages of the four main elements in the human body: Oxygen (65%), Carbon (18%), Hydrogen (10%), Nitrogen (3%), and Other elements (4%).
Types of Chemical Compounds
- Chemical compounds that make up living matter are categorized as organic and inorganic compounds.
- Organic compounds contain Carbon; inorganic compounds do not. Examples of inorganic compounds containing Carbon are Carbon dioxide, Carbon monoxide, Carbonates and Bicarbonates.
- Organic compounds that build living matter are called biomolecules, and they include:
- Carbohydrates
- Proteins
- Lipids
- Nucleic acids
- These four types of compounds are considered to be the main biomolecules.
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Description
Explore the fundamental chemical compounds that constitute living organisms in this quiz on the chemical basis of life. Understand the significance of elements like Carbon, Hydrogen, Oxygen, and Nitrogen, along with the classification of organic and inorganic compounds. Test your knowledge of the essential elements and their roles in biological systems.
