Chap. 8

Question 1

First Law of Thermodynamics

Answer 1

Energy can be transferred and transformed, but it cannot be created or destroyed

Question 1

Second Law of Thermodynamics

Answer 1

Every energy transfer/ transformation increases the entropy of the universe

Question 2

Example of Catabolic Pathway

Answer 2

Cellular respiration- Breakdown of glucose in presence of oxygen to make ATP

Question 3

Example of Anabolic Pathway

Answer 3

Synthesis of proteins from amino acids

Question 4

3 Main Cellular Work

Answer 4

1. Chemical work- Pushing endergonic reactions
2. Transport work- Pumping substances against direction of spontaneous movement
3. Mechanical work- ex. contraction of muscle cells

Question 5

Cellular work is

Answer 5

Powered by hydrolysis ATP

Question 6

Active Site Can Lower Ea Barrier By

Answer 6

1. Orienting substrates correctly
2. Straining substrate bonds
3. Providing a favorable microenvironment
4. Covalently bonding to substrate

Question 7

Enzyme Activity is Affected By

Answer 7

1. Temp + pH
2. Chemical that influence enzyme