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2.2 The challenges of size

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Question 3

An industrial biochemist is designing a rectangular-prism-shaped block of immobilized enzymes to optimize reactant diffusion in a continuous-flow bioreactor. The block has dimensions of $cm2\text{ cm} \times 3\text{ cm} \times 6\text{ cm}$ .

What is the surface-area-to-volume ratio of this block?

A

$1 : 2$

B

$2 : 1$

C

$3 : 1$

D

$5 : 3$

Markscheme

2.2 The challenges of size Questions

GCSE
Biology
2.2 The challenges of size

17 exam-style questions on OCR GCSE Biology 2.2 The challenges of size, covering 2.2.1 Exchange surfaces and surface area : volume ratio, 2.2.2 Substances transported in organisms, 2.2.3 The human circulatory system, 2.2.4 The heart and blood vessels, 2.2.5 Red blood cells and plasma, 2.2.6 Uptake of water and mineral ions by plants, 2.2.7 Transpiration and translocation, 2.2.8 Xylem and phloem, 2.2.9 Environmental factors and water uptake, and 2.2.10 Using a potometer. Each one has a worked solution and a mark scheme showing where the marks go.

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