Many newly forming polypeptide chains function in the
a. nucleus.
b. mitochondria.
c. Golgi apparatus.
d. lysosomes.
e. cytoplasm.
E
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Which organism is a nitrogen-fixing symbiont of legumes?
A. Clostridium B. Nitrobacter C. Pseudomonas D. Rhizobium
Because of the environmental impact of inorganic fertilizers, scientists are working to engineer plants that more efficiently acquire phosphate. Which options below are likely to achieve that goal? (check all that apply)
_____ Plants that express more phosphatase. _____ Plants that make mycorrhizal associations with fungi. _____ Plants that grow less complex root systems. _____ Smart plants that can sense phosphate levels. _____ Plants that secrete less organic acid.
Which of the following best describes an ocean as an open system?
a. It does not exchange matter with its surroundings. b. It absorbs but not releases energy. c. It absorbs and releases energy. d. It exchanges energy but not matter with its surroundings.
Neutrophils are inhibited from gathering at the site of infection by Mycobacterium tuberculosis by what virulence factor of the pathogen?
A) mycolic acid B) cord factor C) kinase D) the capsule E) hemolysin