Topic 1

Question 1

4 Major Classes of Biological Molecules

Answer 1

1 Amino Acids
2. Carbohydrates (monosaccharides)
3. Nucleotides
4. Lipids

Question 2

Amino Acids Contain

Answer 2

• amino group
• carboxylic acid
• side chain

Question 3

Amino Acids

Answer 3

• monomoers that link sequentially to form polymers
• changing their shape can change their function

Question 4

Spontaneous Reactions

Answer 4

• when delta H is < 0 and delta S > 0
• when delta H is (-) = favourable
• when delta S is (+) = favourable

Question 5

Major Biological Polymers

Answer 5

1. Proteins
2. Polysaccharides
3. Nucleic Acids

Question 6

Protein Polymer

Answer 6

• amino acids

Question 7

Polysaccahride Polymer

Answer 7

• carbohydrates

Question 8

Nucleic Acid Polymer

Answer 8

• nucleotides

Question 9

Thermodynamic Equation

Answer 9

• G=H-TS

Question 10

Enthalpy (H)

Answer 10

• the heat content of a system (J/mol)

Question 11

Entropy (S)

Answer 11

• a measure of the system’s disorder/randomness

Question 12

Free Energy (G)

Answer 12

• a measure of the free energy of a system based on H+S
• when G<0= spontaneous/ exergonic
• when G>0= non-spontaneous/ endergonic