BIOS 242: EXAM 2 CHAMBERLAIN ACTUAL EXAM PREP 2026 150
QUESTIONS AND CORRECT DETAILED ANSWERS ALREADY A
GRADED WITH EXPERT FEEDBACK|NEW AND REVISED
1. What is a heterotroph?: organism that must obtain its carbon in organic form
2. What is an autotroph?: an organism that uses inorganic co2 as its carbon source
3. What is a phototroph?: microbes that photosynthesize
4. What is a chemotroph?: microbes that gain energy from chemical compounds
5. What is the temperature range for the optimal rate of growth for a psy-
chrophile?: 0-15 degrees celsius
6. What is the temperature range for the optimal rate of growth for a
mesophile?: 20-40 degrees celsius
7. What is the temperature range for the optimal rate of growth for a ther-mophile?:
45-80 degrees celsius
8. What does a barophile require for growth?: high hydrostatic pressure
9. What is an example of a barophile?: deep sea microbes live in 1000x atmospheric pressure
10. What does a halophile require for growth?: high concentration of salt (9-25% nacl)
11. What are enzymes?: biological catalysts that increase the rate of a chemical reaction
12. is needed for a reaction to occur: activation energy
13. True or false: enzymes lower the activation energy: true
14. Enzymes act on reactant molecules known as : substrates
15. Enzymes bind and chemically change substrates into : products
16. What is an apoenzyme?: protein, composed of a sequence of amino acids
17. What is required for a holoenzyme?: cofactors and coenzyme
18. Cofactors are elements: inorganic
19. Coenzymes are elements: organic
20. What are cofactos?: metal ions that activate enzymes
21. Cofactors help bring the and substrate close together: active site
22. True or false: cofactors do not directly participate in chemical reactions with the
enzyme: false
23. What the is main function of coenzymes?: remove a chemical group from one substrate molecule and
add it to a substrate
24. What is the most important component of coenzymes?: vitamins
25. What are the phases of the growth curve in a bacterial culture?: lag phase, exponential
1/8
, growth/log phase, stationary growth phase, death phase
26. What is the lag phase?: flat period on the graph when the population appears to not be growing
2/8
QUESTIONS AND CORRECT DETAILED ANSWERS ALREADY A
GRADED WITH EXPERT FEEDBACK|NEW AND REVISED
1. What is a heterotroph?: organism that must obtain its carbon in organic form
2. What is an autotroph?: an organism that uses inorganic co2 as its carbon source
3. What is a phototroph?: microbes that photosynthesize
4. What is a chemotroph?: microbes that gain energy from chemical compounds
5. What is the temperature range for the optimal rate of growth for a psy-
chrophile?: 0-15 degrees celsius
6. What is the temperature range for the optimal rate of growth for a
mesophile?: 20-40 degrees celsius
7. What is the temperature range for the optimal rate of growth for a ther-mophile?:
45-80 degrees celsius
8. What does a barophile require for growth?: high hydrostatic pressure
9. What is an example of a barophile?: deep sea microbes live in 1000x atmospheric pressure
10. What does a halophile require for growth?: high concentration of salt (9-25% nacl)
11. What are enzymes?: biological catalysts that increase the rate of a chemical reaction
12. is needed for a reaction to occur: activation energy
13. True or false: enzymes lower the activation energy: true
14. Enzymes act on reactant molecules known as : substrates
15. Enzymes bind and chemically change substrates into : products
16. What is an apoenzyme?: protein, composed of a sequence of amino acids
17. What is required for a holoenzyme?: cofactors and coenzyme
18. Cofactors are elements: inorganic
19. Coenzymes are elements: organic
20. What are cofactos?: metal ions that activate enzymes
21. Cofactors help bring the and substrate close together: active site
22. True or false: cofactors do not directly participate in chemical reactions with the
enzyme: false
23. What the is main function of coenzymes?: remove a chemical group from one substrate molecule and
add it to a substrate
24. What is the most important component of coenzymes?: vitamins
25. What are the phases of the growth curve in a bacterial culture?: lag phase, exponential
1/8
, growth/log phase, stationary growth phase, death phase
26. What is the lag phase?: flat period on the graph when the population appears to not be growing
2/8
