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Membrane Permeability and Temperature Fluctuations

APBIO-ITPLKK

An oak tree is growing in central New Hampshire. To survive, the plasma membranes of its cells must maintain a certain level of fluidity so as to allow the diffusion of various materials into and out of the cells.

As the temperatures fluctuate from very hot to very cold between summer and winter, which of the following enables the tree to maintain appropriately permeable cell membranes?

A

Cells can add phospholipids with saturated fatty acid tails during hot weather.

B

Cells can add more transport proteins to their membranes during hot weather.

C

Cells can add phospholipids with saturated fatty acid tails during cold weather.

D

Cells can increase their surface area to volume ratio during cold weather.