1. Week 1, Quiz 3 – Are you ready?

2. 1. Is less dense than water. 2. Is a polar substance. 3. Is more dense than water. 4. Is a nonpolar substance. Countdown 30

3. 1. Primary structure 2. Secondary structure 3. Tertiary structure 4. Quaternary structure Countdown 30

4. 1. Making energy 2. Storing genetic information 3. Manufacturing proteins 4. Regulating water balance Countdown 30

5. 1. Saturated fatty acids. 2. Unsaturated fatty acids. 3. Trans fatty acids. 4. Polar fatty acids. Countdown 30

6. 1. Amino acids 2. Fatty acids 3. Nucleotides 4. Simple sugars Countdown 30

7. 1. Polar covalent bonds 2. Ionic bonds 3. Hydrogen bonds 4. Nonpolar covalent bonds. Countdown 30