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Chapter 9: Q33P (page 291)
Question: Predict the effect of a mutation in signal peptidase that narrows its specificity so that it cleaves only between two Leu residues.
Answer
Theproteins fold abnormally and function abnormally.
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(a) Individuals with a certain one of the ABO blood types are said to be "universal donors," whereas those with another type are said to be "universal recipients." What are these blood types? Explain. (b) Antibodies are contained in blood plasma, which is blood with its red and white cells removed. Indicate the various compatibilities of blood plasma from an individual with one ABO blood type with an individual with a different ABO blood type. (c) Considering the answers to Parts a and b, why is it possible that there can be a universal donor and a universal recipient for a transfusion of whole blood?
Question: Archae bacteria and Eubacteria produce different types of membrane lipids. How does the archaeal lipid shown here differ from phosphatidyl-glycerol?
Name this lipid.
Why do glycerophospholipids and sphingolipids鈥攂ut not fatty acids鈥攆orm bilayers?
Why can鈥檛 triacylglycerols be significant components of lipid bilayers?
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