Question

Please answer each question and explain why you chose each answer

Microbial growth on the two-carbon acetate substrate invokes
A) the citric acid cycle for aerobic catabolism.
B) both the citric acid and glyoxylate pathways.
C) the glyoxylate pathway.
D) the glyoxylate and glycolysis pathways.

Which two metabolic processes are most dissimilar?
A) citric acid cycle and glycolysis
B) glycolysis and gluconeogenesis
C) proton motive force and substrate-level phosphorylation
D) pentose phosphate pathway and glycolysis

When culturing a chemoorganoheterophic bacterium, what outcome is LEAST likely to occur if ammonia and phosphate are provided at equal concentrations?
A) Cells require much less P to grow than N, so extra P will be used for ATP synthesis and result in a faster growth rate.
B) Cells will never consume all of the phosphate, because N is needed in higher quantities than P.
C) The final biomass of cells will be no different than if only 50% of the phosphate was provided.
D) The bacteria will import all of the ammonia to use for biosynthetic pathways.

Hypothetically, if free electrons existed in sufficient numbers for enzymes to use in metabolic reactions
A) a higher diversity of cytochromes would likely be observed.
B) cytochromes would be unnecessary for cells and quinones would be more important.
C) Q-cycle reactions would no longer be necessary for electron transport, but the proton motive force would otherwise be unchanged.
D) most metabolic pathways for both anabolism and catabolism would have to be rewritten.

Answer 1

B. both glyoxylate pathways and the citric acid

For microbial growth to take place the required energy in the form of ATP is obtained by the citric acid cycle.

Also for the synthesis of large molecules for growth like carbohydrates, the process of glyoxylate cycle is utilised.