DP Chemistry (last assessment 2024)

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Question 17N.3.hl.TZ0.13

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Date November 2017 Marks available [Maximum mark: 2] Reference code 17N.3.hl.TZ0.13
Level hl Paper 3 Time zone TZ0
Command term Outline Question number 13 Adapted from N/A
13.
[Maximum mark: 2]
17N.3.hl.TZ0.13

The stability of DNA is due to interactions of its hydrophilic and hydrophobic components.

Outline the interactions of the phosphate groups in DNA with water and with surrounding proteins (histones).

[2]

Markscheme

Water:
hydrogen/H-bonds

OR

ion–dipole interactions

Proteins:
ionic bonds/interactions

OR

hydrogen/H-bonds

OR

ion–dipole interactions

Ignore “London/dispersion/vdW/dipole–dipole interactions” stated for water and/or proteins.

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