Unit 2- Chemistry Of Life

Question 1

How are compounds different than molecules?

Answer 1

Compounds are groups of 2 or more different types of atoms joined together

Question 2

How is the formation of an ionic bond different than that of a covalent bond?

Answer 2

Covalent bonds share. Ionic bonds don’t share- they give and take

Question 3

What is a polar molecule?

Answer 3

Unequal sharing of electrons

Question 4

The attraction between water molecules due to hydrogen bonding is called…

Answer 4

Cohesion

Question 5

The attraction of water to other polar substances is called..

Answer 5

Adhesion

Question 6

Why do oil slicks form on the surface of the water?

Answer 6

Water is polar and oil is non-polar. Oil is less dense than water so it floats

Question 7

What is the primary purpose of a carbohydrate?

Answer 7

Stores energy

Question 8

What are the 4 major macromolecules?

Answer 8

• carbohydrate
• lipids
• Nucleic acids
• proteins

Question 9

What determines the shape of the protein?

Answer 9

Sequence of amino acids

Question 10

How are atoms, molecules, and macromolecules related?

Answer 10

Atoms interact to form molecules. Molecules bond together to form macromolecules