What protein is involved in synthesizing messenger RNA in eukaryotes?

A. RNA polymerase I
B. RNA polymerase II
C. RNA polymerase III
D. sigma factor
E. both RNA polymerase I and III


B. RNA polymerase II

Biology & Microbiology

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No animal cell has a _____

a. plasma membrane c. lysosome b. flagellum d. cell wall

Biology & Microbiology

Which scientist believed that species gradually

improved towards perfection due to "fluida"?

a. Lyell b. Lamarck c. Darwin d. Cuvier e. Aristotle

Biology & Microbiology

Coastal wetlands, or marshes, serve to

A) purify water farther upriver. B) return nitrogen to the atmosphere. C) store phosphorus. D) provide a habitat for major predators. E) "absorb" water from major storms.

Biology & Microbiology

Which of the following diseases makes antibodies against centromeres and topoisomerases?

A) Sjögren's syndrome B) scleroderma C) rheumatoid arthritis D) poststreptococcal glomerulonephritis E) systemic lupus erythematosus

Biology & Microbiology