Multiple Choice
What are the main structural features of DNA found in the Z conformation?
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14. DNA Synthesis
Discovering the Structure of DNA
Multiple Choice
Which of the following statements best describes the orientation of the two strands of DNA?
A
The two strands are perpendicular to each other.
B
The two strands are twisted in a left-handed helix.
C
The two strands are parallel and run in the same direction.
D
The two strands are antiparallel, running in opposite directions.
Verified step by step guidance1
Understand the structure of DNA: DNA is composed of two strands that form a double helix.
Recognize the term 'antiparallel': In the context of DNA, antiparallel means that the two strands run in opposite directions.
Visualize the orientation: One strand runs in the 5' to 3' direction, while the complementary strand runs in the 3' to 5' direction.
Eliminate incorrect options: The strands are not perpendicular, nor do they run in the same direction, and they form a right-handed helix, not left-handed.
Conclude with the correct description: The two strands of DNA are antiparallel, meaning they run in opposite directions, which is crucial for DNA replication and function.
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