When an electron pair is shared between two atoms:
Correct answer: C. Single covalent bond is formed
- A. Two covalent bonds are formed
- B. Hydrogen bond is formed
- C. Single covalent bond is formed
- D. Ionic bond is formed
Explanation
Option A is incorrect because Two covalent bonds are formed by the sharing of two electron pairs.Option B is incorrect because Hydrogen bond is the weak interaction between partially positive hydrogen atom and partially negative atom, mainly oxygen.Option C is correct since A single covalent bond is formed by the sharing of one electron pair means 2 electrons.Option D is incorrect because Ionic bond is formed by the electrostatic interaction of two oppositely charged ions.
This question appeared on the UHS MDCAT 2011 paper, which you can sit online with every answer explained.
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About Classification of Biological Molecules
Biological molecules are classified as carbohydrates, lipids, proteins and nucleic acids, with water, minerals and vitamins also supporting cellular processes. The key distinctions involve their monomers, chemical bonds, structures and functions, including glucose and starch, fatty acids and triglycerides, amino acids and polypeptides, and nucleotides in DNA and RNA.
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