Question

What direction is a molecule of DNA oriented along?

• A. Both strands 5’$\to$3’
• B. One strand 5’$\to$3’ and the other strand 3’$\to$5’
• C. Both strands 3’$\to$5’
• D. Either A or C

Answer 1

The correct option is B

One strand 5’$\to$3’ and the other strand 3’$\to$5’

The two complementary strands of DNA run in opposite directions- one in the 5’$\to$3’ direction and the other in the 3’$\to$5’ direction.