Which of the following organisms causes urinary tract infections?
A. Gardnerella vaginalis
B. Group BÂ Streptococcus
C. Treponema pallidum
D. Schistosoma haematobium
E. Proteus mirabilis
Answer: E
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A population ecologist wants to estimate the size of a robin population. In an apple orchard, she captures 10 robins,
marks them, and then releases them. She returns several weeks later and captures another 10 robins, of which 2 are robins she previously marked. The estimated population size of robins is ____.
a. 50 b. 15 c. 10 d. 200 e. 20
Which molecule is not directly involved in the process of translation?
A) ribosome B) tRNA C) mRNA D) DNA
Which statement about cell adhesion molecules (CAMs) is false?
A) They are glycoproteins. B) They bind to CAMs on other cells. C) They are all produced by the same gene. D) They contribute to cell migration. E) They contribute to stable tissue structure.
Cyanide is a deadly poison that reacts with hemoglobin in our blood and prevents it from binding oxygen. Cyanide also binds to a molecule in the electron transport chain and blocks the flow of electrons down the chain. Explain why both these mechanisms
will stop ATP synthesis. What will be an ideal response?