1.3 Transport in cells

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The table below shows information about four different strains of cube-shaped bacteria, listed in order of increasing size.

Organism	Side length ( $μm\mu\text{m}$ )	Surface area ( $μm2\mu\text{m}^2$ )	Volume ( $μm3\mu\text{m}^3$ )	Surface area to volume ratio
A (Smallest)	1	6	1	6 : 1
B	2	24	8	3 : 1
C	5	150	125	$Y$ : 1
D (Largest)	10	600	1000	0.6 : 1

Calculate the value of $Y$ in the table.

[2]

Describe the relationship between the size of the organism and its surface area to volume ratio.

[1]

1.3 Transport in cells Questions