7. DNA and Chromosome Structure

Which type of bond is found between complementary nitrogenous bases in the DNA double helix?

In DNA structure, which pair of nitrogenous bases are classified as purines?

In the DNA double helix, which type of bond holds the two strands together through complementary base pairing?

In DNA structure, what overall net charge does DNA carry at physiological pH, and what feature of the molecule is primarily responsible for this charge?

Which of the following components forms the backbone of DNA?

Which type of bond holds the nitrogenous bases together across the middle of the DNA double helix?

The complex of DNA and protein that makes up a eukaryotic chromosome is properly called:

In DNA structure, what molecules make up the repeating backbone of a DNA strand?

In a DNA strand, how can you identify the 5' and 3' ends based on the chemical structure of the sugar-phosphate backbone?

The nucleotides in the backbone of the DNA strand are held together by what type of bond?

In the context of DNA structure, what are the three chemical components of a single DNA nucleotide?

Which nitrogenous bases are found in a strand of DNA?

Which set correctly lists the four nitrogenous bases found in DNA?

Which of the following best describes the structure of a DNA molecule?

Which structural component is found in DNA but not in RNA?