The genetic material in most organisms is composed of which two components alternating in the backbone?

Study for the Manor Preboards Module 2 Test. Use flashcards and multiple choice questions that include hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

The genetic material in most organisms is composed of which two components alternating in the backbone?

Explanation:
DNA's backbone is made of alternating deoxyribose sugar and phosphate groups. Each nucleotide contributes a sugar and a phosphate, connected by phosphodiester bonds to form the long, repeating sugar–phosphate chain that runs along the sides of the double helix. The sugar in DNA is deoxyribose (not ribose, which is found in RNA), and the backbone uses phosphate rather than sulfate or any other group. This arrangement contrasts with RNA, where ribose is used, but the essential idea for most organisms is that the backbone is deoxyribose sugar linked by phosphate groups.

DNA's backbone is made of alternating deoxyribose sugar and phosphate groups. Each nucleotide contributes a sugar and a phosphate, connected by phosphodiester bonds to form the long, repeating sugar–phosphate chain that runs along the sides of the double helix. The sugar in DNA is deoxyribose (not ribose, which is found in RNA), and the backbone uses phosphate rather than sulfate or any other group. This arrangement contrasts with RNA, where ribose is used, but the essential idea for most organisms is that the backbone is deoxyribose sugar linked by phosphate groups.

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