DP Biology (last assessment 2024)

Test builder »

Question 18M.2.SL.TZ1.c

Select a Test
Date May 2018 Marks available [Maximum mark: 7] Reference code 18M.2.SL.TZ1.c
Level SL Paper 2 Time zone TZ1
Command term Explain Question number c Adapted from N/A
c.
[Maximum mark: 7]
18M.2.SL.TZ1.c

Many diseases are caused by bacteria and other pathogens. Explain, using examples, how other factors can lead to disease in humans.

[7]

Markscheme

Since this question is open-ended here is how it may be marked:
For any non-pathogenic disease being addressed, look for the following components
● name of disease/condition.
● factor/category e.g.: genetic, lifestyle, environmental, psychological, multi-factoral.
● description/symptoms of disease.
● cause of disease.

At least 2 of these qualities must be present to earn any marks for a disease or category/factor
For this question use the unlettered tick. Award 4 MAX if only one condition is explained.

Sample answers:
e.g.
cystic fibrosis 

genetic 

multiple lung infections/sticky mucus allows opportunistic bacterial infections of lungs / patients lack lipases/cannot digest fat/do not “thrive” 

recessive (autosomal) allele / homozygous recessive subjects display cystic fibrosis phenotype / chloride channels are faulty 

e.g.
rickets 
environmental / lifestyle / nutritional 
bones are soft/do not calcify 
lack of vitamin D

Syllabus sections