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A-Level Edexcel Biology Units in Calculations

Review A-Level Edexcel Biology units in calculations through mass, volume, length, energy, temperature and rate conversions in biological contexts.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Biology XBI11/YBI11
Level
A2

Exam points

  • convert biological measurements between cm, µm, cm^3 and dm^3 before calculating
  • use correct compound rate units such as nmol mg^-1 min^-1 in data questions
  • convert energy, mass or temperature values and round answers to stated precision

A.0.1—Units in calculations question 1

[Maximum number: 1]

The diagram shows part of the carbon cycle.

Figure for Question A.0.1—Units in calculations question 1 — Edexcel A-Level Biology A2

Key

The numbers in smooth brackets ( ) show the mass of carbon in petagrams found in either the atmosphere, plants or surface ocean.

The numbers in square brackets [ ] show the mass of carbon in petagrams transferred between the atmosphere and the plants or surface ocean per year.

A petagram is equal to 101510^{15} grams.

The mass of carbon recycling between the atmosphere and the plants, and the atmosphere and the oceans, are roughly balanced.

Calculate the increase in the mass of carbon in plants as a result of carbon exchange between the plants and the atmosphere in one year.

Give your answer in kilograms.

Answer. kg

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