A-Level AQA Chemistry Amino acids, Proteins & DNA: Use the Data Booklet to help you

Question

Use the Data Booklet to help you answer these questions.

DNA exists as two strands of nucleotides in the form of a double helix with hydrogen bonding between the two strands.

A deoxyribose molecule in a strand of DNA is shown.

[DNA strand]

Name the types of group attached to 2-deoxyribose at positions X and Y.

X ________________

Y ________________

In the DNA double helix, adenine is linked by hydrogen bonds to a molecule in the other strand of DNA.

Complete the diagram below to show the other molecule and the hydrogen bonds between it and adenine.

[DNA strand]

Use the Data Booklet to help you answer these questions - AQA - A-Level Chemistry - Question 9 - 2017 - Paper 2