Which lipid molecule is linked to lipoproteins? A) phosphatidylinositol B) stero

Question

Which lipid molecule is linked to lipoproteins? A) phosphatidylinositol B) sterols C) isoprenoids D) long-chain fatty acids D) All of the above. What happens to a protein which is modified by the enzyme farnesyl transferase? A) It is degraded. B) It moves to the nucleus. C) It moves to mitochondria. D) It moves the inner leaflet of the plasma membrane. E) It moves to the outer leaflet of the plasma membrane. Which of the following statements about the plasma membrane is true? A) It is a static structure. B) It can undergo phase transitions. C) It is permeable to ions. D) It is impermeable to small non-polar compounds. E) All of the above. How does fatty acid composition affect membrane fluidity? A) Membranes with high short fatty acid content tend to be more fluid than those with low short fatty acid content. B) Membranes with low saturated fatty acids are more rigid than those with high saturated fatty acid content. C Cells living in a hot environment tend

Explanation / Answer

ANSWERS

20) OPTION IS A PHOSPHATIDYLINOSITOL IS LINKED TO LIPOPROTEIN. PHOSPHATIDYLINOSITOL IS PRIMARY ANIONIC LIPID IN LIPOPROTEIN.

21) OPTION IS E. IT MOVES TO THE OUTER LEAFLET OF PLASMA MEMBRANE.

22) OPTION IS B. IT UNDERGOES PHASE TRANSITIONS.

23) OPTION IS E. NONE OF THE ABOVE

24) OPTION IS C. INCREASE IN STEROL CONTENT RESULTS IN INCREASED RIGIDITY.

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