Exam 3: Microbial Metabolism

A bacterial isolate that grows better on a nutrient agar plate supplemented with amino acids but still grows in a nutrient agar plate lacking amino acids suggests amino acids are trace nutrients for the isolate.

Improperly functioning acyl carrier proteins (ACPs)would likely result in

In aerobic respiration,the final electron acceptor is

A bacterium that lacks an arginine biosynthetic pathway would still be able to make proteins with arginine and grow only if arginine is supplemented into the growth medium.

The portion of an enzyme to which substrates bind is referred to as the

In substrate-level phosphorylation,ATP storage is depleted during the steps in catabolism of the fermentable compounds.

Based on your understanding of metabolism,generalize when an enzyme's rate of activity can be changed.

Varied coenzyme availability increases the diversity of enzymatic reactions in both biosynthetic and catabolic pathways possible in a cell.

Summarize the roles the proton motive force has in microbial metabolism.

Biosynthesis of glucose can occur by compounds other than sugars via gluconeogenesis.

Which of the following would be used by a chemoorganotroph for energy?

For a carbon source,chemoorganotrophs generally use compounds such as

All microorganisms require

One example of an electron acceptor that can be used in anaerobic respiration is

The net result of electron transport is the generation of a pH gradient and an electrochemical potential across the membrane.

Compare and contrast defined media and complex media.Use specific examples in your answer.

The net gain of ATP per molecule of glucose fermented is

Explain what an enzyme must accomplish to catalyze a specific reaction.

Consider a pizza dough made by vigorously mixing to form gluten and evenly disperse the ingredients such as baker's yeast (Saccharomyces cerevisiae).Predict the metabolic differences yeast would have in a thinly flattened dough and in a spherical dough ball.

Categorize the circumstances under which the same substance (molecule)can be either an electron donor or an electron acceptor.