Which of the following chemical substances contributes to the unique characteristics of acid-fast bacteria?
A) N-acetylglucosamine
B) peptidoglycan
C) lipoteichoic acid
D) endotoxin
E) mycolic acid
E
Bloom's Taxonomy: Application
Section: Bacterial Cell Walls
Learning Outcome: 3.11
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Which of the following reactions would you predict could be coupled to ATP hydrolysis to ADP + Pi to make it energetically favorable, or spontaneous? Choose all that apply
A. creatine phosphate + H2O creatine + Pi, G -10.3 kcal/mol B. phosphoenolpyruvate + H2O pyruvate + Pi, G -14.8 kcal/mol C. glucose 6-phosphate + H2O glucose + Pi, G -3.3 kcal/mol D. glucose 1-phosphate + H2O glucose + Pi, G -5.0 kcal/mol E. glutamic acid + NH3 glutamine, G +3.4 kcal/mol
Computer programs can scan DNA sequences and identify potential genes, which may or may not be functional genes. A functional gene must
a. share an exon with another functional gene. b. result in a mutant phenotype if its sequence is mutated. c. have an open reading frame. d. be expressed in all cell types of the organism. e. have a functional ortholog in another species.
Which of the following characteristics of the lactose operon is not true of the galactose operon?
A. Repressor binding prevents RNA polymerase from binding to the promoter. B. CRP activates expression when bound to cAMP. C. Expression is high when glucose levels are low and the activating metabolite is present. D. Expression is low when glucose levels are high.
What is the function of a normal MAOA protein? a. It breaks down neurotransmitters in the synapse
b. It carries neurotransmitters across synapses. c. It is a neurotransmitter. d. It is an enzyme essential in the formation of certain neurotransmitters. e. It is an enzyme responsible for the construction of neurotransmitter receptors.