Asked by Morgan Bradley on Jun 20, 2024
Verified
The two molecules that alternate to form the backbone of a polynucleotide chain are
A) adenine and thymine.
B) cytosine and guanine.
C) sugar and phosphate.
D) base and sugar.
E) base and phosphate.
Polynucleotide Chain
A sequence of nucleotides that form a part of a nucleic acid molecule, such as DNA or RNA, linked by covalent bonds.
Sugar
A sweet-tasting, soluble carbohydrate found in many plants, crucial for energy in living organisms.
Phosphate
A chemical compound containing the phosphate ion, PO4^3-, which plays a critical role in biological systems, including energy transfer and the structure of DNA and RNA.
- Identify the different elements and configurations related to DNA, including nucleotides and the double-helix structure.
Verified Answer
KE
Kevin EspinacoJun 26, 2024
Final Answer :
C
Explanation :
The backbone of a polynucleotide chain, such as DNA or RNA, is formed by alternating sugar and phosphate groups. The sugar involved is deoxyribose in DNA and ribose in RNA. The bases (adenine, thymine/cytosine, guanine, and uracil in RNA) attach to the sugar but do not form the backbone itself.
Learning Objectives
- Identify the different elements and configurations related to DNA, including nucleotides and the double-helix structure.