Hyperthermophiles are organisms that thrive at extremely high temperatures. What

Question

Hyperthermophiles are organisms that thrive at extremely high temperatures. What sorts of specializations might they have to survive in such high temperatures? Choose all of the correct answers.

1) cell membranes with a higher degree of unsaturation

2) cell membranes with more cholesterol

3) increased use of isoprene units instead of fatty acids

4) extremely heat stable proteins that function best at high temperatures

5) cell membranes with long chain fatty acids

6) monolayer membranes that link one side to the other for stability

Explanation / Answer

Saturated fatty acids can pack more closely together, increasing the van deer Walls forces between the chains. This means that membranes with a high level of saturated fatty acids will have higher melting points.

1 and 2 are incorrect
4, 5 and 6 are correct
Unsure of 3, but I believe it is correct as well.

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