What is the "double helix" when referring to the structure of DNA? a. four strands of linked nucleotides that are bound by sugar groups b. two strands of linked nucleotides that fold back and forth like an accordion c. two chromosomes that are twisted around each other d. two strands of linked nucleotides that are twisted around each other e. four strands of linked nucleotides that are bound by phosphate groups
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Step 1: A double helix refers to the structure of DNA, which consists of two strands of linked nucleotides. Show more…
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What is the structural feature that allows dna to replicate?a. dna molecules have the same number of purines and pyrimidines.b. the nitrogenous bases are located on the inside of the double helix.c. the strands of the double helix are complementary.d. twisting of the molecule to form an α-helixe. three-component structure of the nucleotides?
Sri K.
The two complementary strands of the DNA double helix are held to each other by (a) ionic bonds between deoxyribose molecules (b) ionic bonds between phosphate groups (c) covalent bonds between nucleotide bases (d) covalent bonds between deoxyribose molecules (e) hydrogen bonds between nucleotide bases
Why is a DNA molecule called a double helix? A. Each nucleotide has two main parts: a base and a phosphate. B. The sugar and phosphate parts are the same in all DNA molecules. C. There are two kinds of nitrogen bases in a DNA molecule. D. A DNA molecule always has two strands of nucleotides.
Joanna Q.
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