Which of the following is a trace element?
Correct answer: B. Copper
- A. Hydrogen
- B. Copper
- C. Oxygen
- D. Carbon
Explanation
Copper is a chemical element with the symbol Cu and atomic number 29. It is a transition metal with a reddish-brown color, and it is known for its excellent conductivity of electricity and heat. Copper serves as a cofactor for several enzymes involved in essential biological processes.
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About Biological Molecules
The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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