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Paper 2 is the last examination you'll face in IB Biology. In this post, we’ll provide a thorough breakdown of IB Biology Paper 2, ensuring you are familiarised with the structure of the exam and know what type of questions to expect.
IB Biology Paper 2
- Accounts for 44% of the student's subject grade (SL & HL).
- SL students have 1 hour 30 minutes, while HL students are given 2 hours 30 minutes to complete Paper 2.
- Calculators are permitted.
- Paper 2 is made up of short-answer and extended-response questions.
- Paper 2 may cover all topics of the syllabus.
- A calculator is required for this exam.
- Students will have access to an IB-issued formula booklet.
A typical SL question may look the following way:
(a) (i) Label the area where cellulose is found in the micrograph of a plant cell. [1]
(ii) Cellulose is the most abundant organic polymer on Earth. Describe the structure of cellulose. [3]
(b) Outline one reason for humans being unable to digest cellulose. [1]
(c) Explain the advantages of having both lipid and carbohydrate as energy stores in the human body. [2]
A typical HL question may look the following way:
In Solanum tuberosum, above ground are the photosynthetic organs of the plant, and below ground is a large tuber which stores energy in the form of carbohydrates.
(a) State which molecule serves as a source of electrons for photosystem II at the beginning of the electron transport chain in chloroplasts. [1]
(b) Outline how the structure of cellulose provides support to plants. [2]
(c) Outline how the structure of glycogen is suited to its storage role in animals. [2]
(d) Explain how glucose is transported in the phloem, from the leaf to the roots. [5]
How to succeed in IB Biology Paper 2?
To perform well in Biology Paper 2, it’s essential to master both the vast amount of information in the syllabus and the analytical skills required to tackle data-based questions. IB Biology involves a significant amount of content to memorize, so frequent practice is essetial. We recommend using study techniques such as spaced repetition to help you retain the material over time.
Remember that success in Paper 2 isn’t just about recalling facts. Many questions require you to analyse data critically and apply your knowledge to explain concepts in ways that may not be immediately obvious. To prepare, make sure to regularly practice past exam questions and focus on improving your ability to interpret and explain data.
We hope you found this post helpful. For more useful materials associated with the IB check out the wide variety of IA, EE and TOK exemplars available at Clastify.
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