What is common to both photosystems I and II?
A. Both involve the generation of oxygen.
B. Both lose an electron to a primary electron acceptor that passes the electron down an electron transport chain leading to the generation of ATP.
C. Both are found in the stroma.
D. Both contain a reaction center composed of chlorophyll a.
E. Both involve the splitting of water to donate an electron to the reaction center.
Answer: D
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Which of the following is an advantage of cDNA libraries?
A. cDNA libraries are easy to make. B. cDNA libraries utilize genomic DNA, which is easy to obtain. C. cDNA lacks introns and therefore reflects all the genes expressed by a particular tissue or organism. D. cDNA lacks exons. E. cDNA libraries are more stable than other DNA libraries.
Streptomyces
A. may produce antibiotics. B. may produce geosmins. C. will swarm together to form fruiting bodies. D. are typically found in the soil. E. may produce antibiotics, may produce geosmins AND are typically found in the soil.
If the vas deferens tubes are cut and tied
(vasectomy), the semen eventually will not contain a. fructose. b. buffers. c. prostaglandins. d. sperm. e. any of these.
A young woman presents to the emergency room with fever, headache, and vomiting. Food poisoning is suspected, she is given supportive care, and released. One week later she returns to the hospital in acute renal failure. A medical history reveals that
she had been a volunteer at an orphanage in a rural section of a Caribbean island recently hit by a hurricane. During evacuation from the island, she had to wade through floodwaters suffered several abrasions on her legs and feet. What is the most likely pathogen based on her symptoms and history? A) uropathogenic E. coli B) BK virus C) leptospirosis D) candiduria E) Staphylococcus saprophyticus