Which end of the phospholipid is attracted to water?

2 Answers
Aug 28, 2017

Answer:

phospholipid is basically lipid with phosphate group

Explanation:

A phospholipid has two components:

  1. Phosphatidic acid
  2. Amino alcohol

enter image source here

All phospholipids have phosphatidic acid as their backbone and an amino alcohol.Amino alcohol also is of three types:

  1. Coline
  2. Ethnaloamine
  3. Sphingosine

https://chem.libretexts.org/Textbook_Maps/Introductory_Chemistry_Textbook_Maps/Map%3A_The_Basics_of_GOB_Chemistry_(Ball_et_al.)/17%3A_Lipids/17.3%3A_Membranes_and_Membrane_Lipids
http://www.chem.latech.edu/~deddy/chem121/Lipids.htm

When coline binds with phosphatidic acid, it forms lesithin. When ethnaloamine binds with phosphatidic acid, it forms cephaline and when sphingosine binds with phosphatidic acid, it forms sphingolipid.

In all phospholipids, the phosphatidic acid is hydrophobic while amino alcohol is hydrophilic.

Aug 29, 2017

Answer:

The end containing the phosphate group is attracted to water.

Explanation:

A phospholipid is a molecule that is formed by the condensation of:

  • a glycerol molecule
  • two fatty acids
  • a phosphate group
  • an alcohol

The most common phospholipid in the human body is lecithin.

Lecithin
(From Seven Days per Week - blogger)

The components of a molecule of lecithin are

  • choline

www.cholineinfo.org

  • phosphoric acid, #"H"_3"PO"_4#

  • glycerol

www.nutrientsreview.com

  • stearic acid

www.ch.ic.ac.uk

  • oleic acid

www.tuscany-diet.net

The end containing the choline and the phosphate group is called the hydrophilic head of the molecule.

The choline contains a positive charge and the phosphate has a negative charge, so they are highly solvated by water molecules.