DP Biology (first assessment 2025)

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Question 19M.2.SL.TZ1.d

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

Outline the role of lymphocytes in defence against disease.

[2]

Markscheme

a. produce antibodies ✔

b. memory cells confer immunity ✔

c. specific immunity results from production of antibodies specific to a particular antigen ✔

d. recognize pathogens ✔

e. destroy foreign cells/cancer cells ✔

Examiners report

Many candidates correctly stated that lymphocytes produce antibodies. Lymphocytes were often mistaken for phagocytes and lengthy descriptions of engulfing of diseases were given. 

Syllabus sections