Paper 1 · DNA and Molecular Genetics
The following diagram shows a single DNA strand. Which is the direction of the strand as indicated by the arrow and the type of bond represented at X?
Adirection of strand 3¹ – 5¹, bond at X phosphoester
Bdirection of strand 3¹ – 5¹, bond at X hydrogen
Cdirection of strand 5¹ – 3¹, bond at X phosphoester
Ddirection of strand 5¹ – 3¹, bond at X hydrogen
ZIMSEC Biology 9190/1 Paper 1, June 2004, Q12