ch. 3 lipids: hydrophobic molecules

Question 1

lipids

Answer 1

loosely defined group of molecules with one main characteristic: insoluble in water

Question 1

lipids

Answer 1

loosely defined group of molecules with one main characteristic: insoluble in water

Question 2

lipids are built from a simple skeleton mace up of two main kinds of molecules:

Answer 2

fatty acids and glycerol

Question 3

fatty acids are

Answer 3

long-chain hydrocarbons w/ a carboxyl group at one end

Question 4

glycerol is

Answer 4

a 3-carbon polyalcohol.

Question 5

many lipid molecules consist of one _______ molecule with three _______ _____ attached, one to each carbon of the glycerol backbone.

Answer 5

glycerol, fatty acids

Question 6

because it contains three fatty acids, a fat molecule is called a

Answer 6

triglyceride

Question 7

if all of the internal carbon atoms in a fatty acid chain are bonded to two hydrogen atoms, we call this ______.

Answer 7

saturated

Question 8

a fatty acid with double bonds between one or more pairs of successive carbon atoms will have fewer hydrogen atoms, and is thus _______.

Answer 8

unsaturated

Question 9

complex lipid molecules called _______ are among the most important molecules of the cell because they form the core of all biological membranes.

Answer 9

phospholipids