Scelta multipla
Which type of bond 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
Scelta multipla
What do the two strands of DNA join together to form?
A
A single-stranded loop
B
A beta-pleated sheet
C
A double helix
D
A linear polypeptide
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Recall the basic structure of DNA, which consists of two strands made up of nucleotides.
Understand that these two strands are complementary and run in opposite directions (antiparallel).
Recognize that the strands are held together by hydrogen bonds between complementary base pairs (adenine with thymine, and cytosine with guanine).
Know that the two strands twist around each other to form a stable three-dimensional structure.
Identify this twisted, ladder-like structure as the double helix, which is the characteristic shape of DNA.
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