All of the following statements about preparation of spotting needles are true EXCEPT: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Each spotting needle must be open at both ends. b The capillary tube must be positioned at the tip of the inner blue cone of the Bunsen burner to soften it. The capillary tube must be rolled back and forth between your thumb and forefinger using both hands. d Once it has cooled the capillary tube can be snapped in half using your fingers. e You must bring your hands together to bend the capillary tube when it begins to soften in the flame.

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Micelles and Biological Membrane

Micelles are the type of lipid molecules that organize themselves in spherical shape in aqueous solutions. The production of the micelle is a reply to the amphipathic behavior of fatty acids. It means that they consist of both hydrophobic regions and hydrophilic regions. In micelles, polar head groups (hydrophilic groups) produce an outer layer associated with water whereas nonpolar tails (hydrophobic groups) are organized in the interior.