A. The nucleotide sequence of one DNA strand of a DNA double helix is 5-GGATTTTTGTCCACAATCA-3. What is

Question:

A. The nucleotide sequence of one DNA strand of a DNA double helix is 5ʹ-GGATTTTTGTCCACAATCA-3ʹ. What is the sequence of the complementary strand?

B. In the DNA of certain bacterial cells, 13% of the nucleotides contain adenine. What are the percentages of the other nucleotides?

C. How many possible nucleotide sequences are there for a stretch of single-stranded DNA that is N nucleotides long?

D. Suppose you had a method of cutting DNA at specific sequences of nucleotides. How many nucleotides long (on average) would such a sequence have to be in order to make just one cut in a bacterial genome of 3 × 10⁶ nucleotide pairs? How would the answer differ for the genome of an animal cell that contains 3 × 10⁹ nucleotide pairs?

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