Lecture 1.2

Question 1

Unique Chemical Properties of Water

Answer 1

small size
bent shape
polar covalent bonds
overall polarity
ability to form H-bonds

Question 2

Unique Properties of Water

Answer 2

solvent for polar compounds
high surface tension (cohesion)
high heat capacity
high heat of vaporization
liquid has a higher density than solid

Question 3

Hydrophobic Effect

Answer 3

brings together nonpolar molecules in order to avoid contact with water

Question 4

hydrogen bond

Answer 4

• electrical attraction between the partial positive charge on hydrogen and a partial negative charge on an electronegative element
• forms between a hydrogen atom in a polar covalent bond and a strongly electronegative atom

Question 5

Characteristics of Life

Answer 5

• made up of carbs, lipids, nucleic acids, and proteins
• made up of one or more cells
• acquire energy from their environment
• contain genetic information to help develop, function, and reproduce
• use a universal molecular code to make proteins
• respond to internal stimuli
• maintain homeostasis
• product of evolution