DP Biology (first assessment 2025)

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Question 20N.2.SL.TZ0.b

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Date November 2020 Marks available [Maximum mark: 5] Reference code 20N.2.SL.TZ0.b
Level SL Paper 2 Time zone TZ0
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 5]
20N.2.SL.TZ0.b

Outline how carbon compounds are produced in cells using light energy.

[5]

Markscheme

a. occurs by the process of photosynthesis;

b. occurs in chloroplasts of plant cells/using chlorophyll;

c. chlorophyll absorbs red/blue light AND reflects green light; Both needed for marking point.

d. raw materials/starting products are carbon dioxide and water/shown in an equation;

e. water is split by photolysis;

f. oxygen is produced as waste/by-product/lost;

g. glucose formed/shown in an equation;

h. glucose molecules combine to form starch for storage;

i. light energy transformed to chemical;

Syllabus sections