1. A phospholipid has a "head" made up of a glycerol molecule attached to a single Blank, which is attached to another small molecule.target 1 of 5

Question

2. Phospholipids vary in the small molecules attached to the phosphate group. The phospholipid shown in the figure has a Blank attached to phosphate.target 2 of 5
3. Because the phosphate group and its attachments are either charged or polar, the phospholipid head is Blank, which means it has an affinity for water.target 3 of 5
4. A phospholipid also has two "tails" made up of two Blankmolecules, which consist of a carboxyl group with a long hydrocarbon chain attached.target 4 of 5
5. Because the C-H bonds in the fatty acid tails are relatively nonpolar, the phospholipid tails are Blank, which means they are excluded from water.

Answer 1

1. A phospholipid has a "head" made up of a glycerol molecule attached to a single phosphate, which is attached to another small molecule.

2. Phospholipids vary in the small molecules attached to the phosphate group. The phospholipid shown in the figure has a choline attached to phosphate.

3. Because the phosphate group and its attachments are either charged or polar, the phospholipid head is hydrophilic, which means it has an affinity for water.

4. A phospholipid also has two "tails" made up of two fatty acid molecules, which consist of a carboxyl group with a long hydrocarbon chain attached.

5. Because the C-H bonds in the fatty acid tails are relatively nonpolar, the phospholipid tails are hydrophobic, which means they are excluded from water.