7. DNA and Chromosome Structure

Which of the following is the only difference between the nitrogenous bases found in DNA and those found in RNA?

Which of the following is a feature shared by both DNA and RNA?

In terms of overall electrical charge at physiological pH, what net charge does DNA typically carry and what structural feature is primarily responsible?

In the DNA double helix, which two molecules form the repeating sugar-phosphate backbone of each strand?

Which of the following DNA molecules is expected to be the most thermodynamically stable under physiological salt conditions, assuming all are the same length and fully paired (no mismatches)?

DNA consists of two antiparallel strands of nucleotides held together by which type of bonds?

The two strands of a DNA molecule are held together by hydrogen bonds between the:

In double-stranded DNA, what is the correct base-pairing rule (Watson–Crick base pairing)?

In the context of DNA structure, which nucleotide base is not found in DNA?

The pairing of nitrogenous bases in DNA is specific because which feature ensures that adenine pairs with thymine and guanine pairs with cytosine?

If you stretched the DNA from a single human cell end to end, approximately how long would it be?

In DNA structure, which nitrogenous base is NOT found in DNA?

In the context of DNA structure, which letter represents the sugar component in the nucleotide backbone?

In gel electrophoresis, how do short strands of DNA move compared to long strands?

Which components make up the backbone of the DNA molecule?