Oxidative phosphorylation requires all of the items listed below except
A) ATP synthase in the correct position in the membrane.
B) enzyme complexes embedded in a membrane.
C) the flow of electrons from NADH and QH2 in the membrane.
D) a matrix more positively charged than the intermembrane space.
E) a terminal electron acceptor which is O2 in mitochondria.
D) a matrix more positively charged than the intermembrane space.
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A(n) ____________________ cannot be verified because it involves subjective judgment. Fill in the blank(s) with the appropriate word(s)
Cytotoxic T cells eliminate pathogens by
A) releasing chemicals which are toxic to cellular pathogens. B) ingesting and digesting infected or cancerous cells. C) coordinating the activities of other immune cells. D) releasing chemicals which cause infected or cancerous cells to undergo apoptosis. E) ingesting and digesting cellular pathogens.
A 42-year-old male construction worker in southern Arizona developed a cold-like illness, experiencing a chronic cough, chest pain, headaches, and general fatigue. When the symptoms did not abate after several weeks, he visited his physician who ordered microscopic examination and culture of his sputum specimen. Direct microscopic exam demonstrated the presence of large spherule structures full of endsospores. The specimen was cultured at both 25oC and 37oC. The plate incubated at 25oC grew tan colonies with a fluffy white center. Examination of these colonies microscopically showed branching septate hyphae. As the culture matured, the hyphae fragmented into arthrospores. What is the most likely diagnosis?
A. Candidiasis B. Sporotrichosis C. Coccidioidomycosis D. Histoplasmosis E. Blastomycosis
Friedrich Miescher is credited with _____
a. proposing DNA as the hereditary material b. finding that proteins are the physical basis of inheritance c. defining the laws of inheritance d. being the first person to describe and extract DNA e. determining that proteins are composed of unlimited combinations of twenty amino acids