PreAP Bio prep - organic molecules

Lipids have no uniform structure, but instead share this common characteristic

• All contain fatty acids
• All are oils
• All are hydrophobic
• All are polar

Phospholipids are most important to the function of

• Fatty Acid Construction
• Cell Membrane Formation
• Organ Cushioning
• Meat Marbling

What type of carbohydrate is this?

• polysaccharide
• disaccharide
• monosaccharide
• it isn't a carbohydrate

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Why can water have no net charge but have slight charges in different parts of the molecule?

• The oxygen end is slightly negative and the hydrogen end is slightly positive
• The hydrogen end is slightly negative and the oxygen end is slightly positive
• The hydrogen and oxygen ends change in polarity
• Because it is hydrophobic

Tags

NGSS.MS-PS1-1

Attractions between water molecules are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

Tags

NGSS.HS-ESS2-5

The attraction that causes water and other liquids to form drops on thin films is called ________________. This is also water’s ability to be attracted to other water molecules.

• adhesion
• capillary action
• cohesion
• surface tension

Tags

NGSS.HS-ESS2-5

Why does ice float?

• As water freezes, it expands and its density decreases.
• As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
• As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
• As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

Tags

NGSS.MS-PS1-4

Which types of compounds dissolve easily in water?

• Polar and Nonpolar
• Polar and Ionic
• Nonpolar and Ionic
• Covalent and Nonpolar

Tags

NGSS.HS-PS1-1

Water beads up on the surface of a penny because of this property.

• Adhesion
• High Surface Tension
• Universal Solvent
• Changes in Density