Chapter 7: Fermentation and Anaerobic Respiration

Question 1

• electrons carried by NADH are transferred to an organic acceptor molecule
• NAD+ accepts electrons in reaction 6 o glycolysis
• glycolysis continue to supply ATP by substrate-level phosphorylation

Answer 1

fermentation

Question 2

• converts pyruvate into lactate
• occurs in some bacteria, plant tissues, skeletal muscle
• used to make buttermilk, yogurt, dill pickles

Answer 2

lactate fermentation

Question 3

• converts pyruvate into ethyl alcohol and CO2
• occurs in some plant tissues, invertebrates, protists, bacteria, and single-celled fungi such as yeasts
• used to make bread and alcoholic beverages

Answer 3

alcoholic fermentation

Question 4

fermentation is the only source of ATP for bacteria and fungi that lack enzymes to carry out oxidative phosphorylation

Answer 4

strict anaerobes

Question 5

can switch between fermentation and full oxidative pathways, depending on the oxygen supply

Answer 5

facultative anaerobes

Question 6

they have an absolute requirement for oxygen to survive and are unable to live solely by fermentations

Answer 6

strict aerobes