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13 Jan 2018

Neutral lipids are normally associated with which purpose: A. signaling B. structure C. catalysis D. energy E. information storage Explain

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Keith Leannon
Keith LeannonLv2
14 Jan 2018
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Which of the following is nota function in which lipids play an important role?

A) Vision

B) Storing energy

C) Membrane structure

D) Storing genetic information

E) Chemical signaling

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A) asymmetric lipid bilayer

B) contains integral membrane proteins

C) lipid monolayer
D) contains lipids with ester-linked fatty acids

E) none of the above

Which of the following has been identified as cell inclusions but are NOT storage compounds?

A) glycogen
B) polyhydroxybutyrate (PHB)

C) polyphosphate
D) magnetosomes (magnetite)

E) pili

Assume the amino acid R groups located in the active site of an enzyme important for its function are Glutamate and Aspartate at positions 85 and 176. Both of these are polar, negatively charged AA’s. What would likely happen if one of these AA’s were mutated to a lysine, which is a positively charged AA?

A. Nothing. The enzyme would function normally

B. The active site wouldn’t form and the substrate wouldn’t bind, and no catalysis would take place.

C. The active site would form, the substrate could bind, but catalysis wouldn’t take place or at a reduced rate.

D. The active site would form but the substrate couldn’t bind and no catalysis would take place.

The correct answer is C. Could someone please explain why this is?
Thank you

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