Plasma Membranes Must Be in a Fluid (Liquid) State in Order

question 22

Multiple Choice

Plasma membranes must be in a fluid (liquid) state in order to function properly. Fluidity is temperature- dependent. Bacteria can regulate the specific lipid composition of their plasma membranes. Which of the following statements is true?

• A) The proportion of saturated lipids in the plasma membrane will increase with both cooler and warmer growth temperatures.
• B) The proportion of unsaturated lipids in the plasma membrane will increase with warmer growth temperatures.
• C) The proportion of unsaturated lipids in the plasma membrane will increase with cooler growth temperatures.
• D) The proportion of saturated lipids in the plasma membrane will increase with cooler growth temperatures while the proportion of unsaturated lipids will increase with warmer growth temperatures.
• E) The proportion of saturated lipids in the plasma membrane will increase with cooler growth temperatures.

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