Which factor is not a reason Propionibacterium acnes (P. acnes) is often associated with acne?
A) increased sebum production during adolescence
B) biofilm formation by P. acnes in pores and glands
C) increased oxygen levels in clogged pores favoring bacterial growth
D) the ability of P. acnes to metabolize sebum
E) the inflammatory responses to P. acnes which causes pustules and cysts
Answer: C
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Glycolysis is a series of chemical reactions (endergonic and exergonic) by which the cell can obtain ATP. NAD+ plays a crucial role in the reactions of glycolysis by:
A. accepting electrons from glucose so that glucose gets partially oxidized to pyruvate. B. donating electrons to pyruvate when glucose gets partially oxidized. C. converting endergonic reactions to exergonic reactions so that there is an output of energy to make ATP. D. donating electrons to ADP to make ATP.
Support for the succession mechanism of tolerance is found in research on plant communities that shows
A. that plants release toxins that prevent other species from establishing. B. succession is random and cannot be predicted by existing species. C. climax communities never form as predicted by Clements. D. succession is determined largely by species that exist in the ground as seeds or old roots. E. competition-tolerant species colonize first.
The goal of pharmacogenomics is to identify genes related to human diseases
a. True b. False
The majority of microbes live and grow in habitats between pH 7 and 9.
Answer the following statement true (T) or false (F)