Which of the following statements is true?
(a) Phospholipids will spontaneously form liposomes in nonpolar solvents.
(b) In eukaryotes, all membrane-enclosed organelles are surrounded by one lipid bilayer.
(c) Membrane lipids diffuse within the plane of the membrane.
(d) Membrane lipids frequently flip-flop between one monolayer and the other.
(c) The remaining answers are false. Phospholipids form bilayers only in polar solvents. Nuclei and mitochondria are enclosed by two membranes. Membrane lipids rarely flip-flop between one monolayer and the other.
You might also like to view...
Which of these are amniotes?
A) amphibians B) fishes C) turtles D) lungfish
Before Title IX was enforced, one myth that authorities embraced about women’s participation in competitive sports was that
a. Soviet women's gender had to be verified clinically b. their marriageability would be jeopardized c. black athletes were superior to white athletes d. There reproductive organs would be harmed
The physical appearance and physiology of an organism, resulting from interactions of its genetic makeup and its environment, is its
(a) phenotype. (b) hybrid vigor. (c) dominance. (d) genotype.
The initiation of translation in archaea ________.
A. employs fMet-tRNAifMet the same as bacterial cells, but proceeds in a mechanism similar to eukaryotes B. employs fMet-tRNAifMet and proceeds in a mechanism similar to bacterial cells C. employs Met-tRNAiMet and proceeds in a mechanism similar to eukaryotic cells D. employs Met-tRNAiMet the same as eukaryotic cells, but proceeds in a mechanism similar to bacteria