DP Biology (first assessment 2025)

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Question 19M.2.HL.TZ1.f

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.2.HL.TZ1.f
Level HL Paper 2 Time zone TZ1
Command term Outline Question number f Adapted from N/A
f.
[Maximum mark: 2]
19M.2.HL.TZ1.f

Based on these data, outline the evidence that T-705 has potential to be used as a treatment for EVD.

[2]

Markscheme

a. cells not killed/few cells killed «even at high concentrations» ✔

b. «T-705» effective/viruses reduced/viruses killed at 100 μM
OR
«T-705» very effective/viruses much reduced/nearly all viruses killed at 1000 μM ✔

c. virus concentration decreases as T-705 concentration increases ✔

d. drug has «high» potential for treatment «at high enough concentration» ✔

Examiners report

Graph was well read and understood by most. The question was answered with more insight than expected, especially when alluding to the implications of live cells at high drug concentrations

Syllabus sections