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Questions and Answers
What are the most common 4 elements found in the living body?
What are the most common 4 elements found in the living body?
Carbon, Hydrogen, Oxygen, Nitrogen
How can chemical compounds that build up living matter be divided?
How can chemical compounds that build up living matter be divided?
Organic compounds and inorganic compounds
What are the four types of biological molecules?
What are the four types of biological molecules?
Carbohydrates, Proteins, Lipids, Nucleic acids
How many elements are present in the living body out of the 92 elements present in nature?
How many elements are present in the living body out of the 92 elements present in nature?
What are some inorganic molecules that are essential for the maintenance of life?
What are some inorganic molecules that are essential for the maintenance of life?
What distinguishes organic compounds from inorganic compounds?
What distinguishes organic compounds from inorganic compounds?
Name two elements other than Carbon, Hydrogen, Oxygen, and Nitrogen that are essential for the survival of organisms.
Name two elements other than Carbon, Hydrogen, Oxygen, and Nitrogen that are essential for the survival of organisms.
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Study Notes
Elements in the Living Body
- Only about 25 elements out of 92 naturally existing elements are present in the living body.
- These elements are present in different locations in the body in different forms.
Most Common Elements in the Living Body
- The most common 4 elements in the living body are Carbon, Hydrogen, Oxygen, and Nitrogen.
- Other essential elements include Sulphur, Phosphorous, Sodium, Potassium, Calcium, Magnesium, Iron, and Chlorine.
Elements Percentage in the Human Body
- Diagram 1.1 shows the percentages of main elements in the human body.
Classification of Chemical Compounds
- Chemical compounds can be divided into two categories: organic compounds and inorganic compounds.
- Organic compounds contain carbon, while inorganic compounds do not contain carbon.
Biological Molecules
- Biological molecules are organic compounds that build up living matter.
- There are four types of biological molecules:
- Carbohydrates
- Proteins
- Lipids
- Nucleic acids
Inorganic Molecules
- Inorganic molecules include water, minerals, and gases.
- These molecules are essential for the maintenance of life.
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