Ribose forms a _ cornered ring.
Correct answer: D. Five
- A. Three
- B. Four
- C. Six
- D. Five
Explanation
Ribose forms a five-membered ring, which is also called a furanose ring. This ring consists of four carbon atoms and one oxygen atom. Structure: In aqueous solution, ribose primarily exists in its cyclic furanose form. The ring is made up of four carbon atoms from the original five-carbon chain and one oxygen atom.Numbering: The carbon atoms in the ring are numbered 1 through 4, with the fifth carbon (C5) attached to the fourth carbon and extending outside the ring.Function: This five-membered ring structure is crucial in biological molecules like RNA, where ribose forms the backbone with a phosphate group.
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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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