Multiple Choice
Which type of force is primarily responsible for holding the two strands of DNA together in the double helix?
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7. DNA and Chromosome Structure
DNA Structure
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Given the DNA strand 5'-ATCGGTA-3', what would be the sequence of its complementary DNA strand?
A
3'-UAGCCAU-5'
B
3'-TACCGAT-5'
C
3'-ATCGGTA-5'
D
3'-TAGCCAT-5'
Verified step by step guidance1
Identify the base pairing rules for DNA: Adenine (A) pairs with Thymine (T), and Cytosine (C) pairs with Guanine (G).
Write down the original DNA strand given: 5'-ATCGGTA-3'.
Determine the complementary bases for each nucleotide in the original strand using the base pairing rules.
Since the complementary strand runs antiparallel, reverse the direction to 3' to 5' when writing the complementary sequence.
Combine the complementary bases in the 3' to 5' direction to get the full complementary DNA strand.
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