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HIV Resistance Genetics

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Questions and Answers

What is the impact of unsaturated hydrocarbon tails on membrane fluidity?

They prevent movement of proteins

They make the membrane more solid

They make the membrane more fluid (correct)

They have no impact on membrane fluidity

What effect does the steroid cholesterol have on membrane fluidity at warm temperatures?

It restrains movement of phospholipids (correct)

It solidifies the membrane

It has no effect on membrane fluidity

It increases lateral movement of phospholipids

How does temperature affect the fluidity of a membrane rich in unsaturated fatty acids?

It has no effect on fluidity

It becomes more solid as temperature decreases

It solidifies at higher temperatures

It remains fluid to a lower temperature (correct)

What is the role of the CCR5 protein in relation to HIV infection?

It acts as a co-receptor for HIV entry into cells Signup and view all the answers

How do resistant individuals prevent HIV infection due to the alteration in the CCR5 gene?

By preventing the virus from entering cells Signup and view all the answers

What is the importance of membrane carbohydrates in cell-cell recognition?

They play a role in the sorting of cells into tissues and organs during embryonic development Signup and view all the answers

What type of proteins penetrate the hydrophobic core of the lipid bilayer?

Integral proteins Signup and view all the answers

Which function do transmembrane proteins primarily serve in the membrane?

Transport Signup and view all the answers

What is the main role of glycoproteins on the cell's surface?

Cell-cell recognition Signup and view all the answers

Why do fishes living in extreme cold have membranes with a high proportion of unsaturated hydrocarbon tails?

To enable their membranes to stay fluid in extreme cold Signup and view all the answers