Unit 3: Bacterial Metabolism

Question 1

what is pyruvic acid

Answer 1

common intermediate provides carbon for org production or biosynthesis

Question 2

products of anaerobic respiration

Answer 2

Co2, reduced species and ATP

Question 3

products of aerobic respiration

Answer 3

Co2 water and ATP

Question 4

what is fermentation

Answer 4

organic compounds act both as donors and acceptors of e-. take place in presence of absence of O2

Question 5

products of fermentation

Answer 5

varies ethanol, lactase, CO2, H2, acetate etc

Question 6

what is the aerobic respiration

Answer 6

pyruvate enters krebs e- go down ETC using O2 as terminal e- acceptor

Question 7

what is anaerobic respiration

Answer 7

when e- move down to inorganic terminal acceptor other than O2

Question 8

efficiency of aerobic respiration

Answer 8

all 6 glucose converted. 38 ATP molecules

Question 9

efficiency of anaerobic respiration

Answer 9

ATP varies 2 to 38 because only part of krebs operate anaerobically not all ETC used

Question 10

efficiency of fermentation

Answer 10

ATP yield is 2

Question 11

end products of mixed acid fermentation

Answer 11

strong acids- lactic, acetic,formic acids, H2 and Co2

Question 12

which genus uses mixed acid and butanediol fermentation

Answer 12

Enterobacteriaceae