An organism that obtains its nutrition from dead organic matter is a:
A) saprophyte. B) phytoplankton. C) parasite. D) neophyte.
Answer: A
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A new experimental pesticide is being tested by a large agricultural chemical company. An unfortunate side effect in plants treated with this new product is a decrease in NADPH production in the chloroplasts
(Interestingly, reduction of NAD+ to NADH in the mitochondria is unaffected.) Given this observation, which of the following would you expect to observe in the chloroplasts of these plants? A. an increase in 3-phosphoglycerate levels and a decrease in RuBP production B. a decrease in 3-phosphoglycerate levels and an increase in RuBP C. an increase in glyceraldehyde-3- phosphate production D. an increase in 3-phosphoglycerate production and an increase in RuBP
Which of the following type of reversible enzyme inhibitor binds to a site distinct from the substrate active site?
A. competitive B. uncompetitive C. mixed D. uncompetitive and mixed E. competitive, uncompetitive, and mixed
Which of the following occurs when the cAMP-CAP complex binds the CAP site near the lac promoter?
A. Transcription rate decreases. B. Transcription rate increases. C. RNA polymerase binds to the promoter. D. RNA polymerase binds to the promoter and transcription rate decreases. E. RNA polymerase binds to the promoter and transcription rate increases.
The endothelial cells found closest to the site of an infection express proteins called lectins. Each lectin binds to a particular ____________ that is presented on the surface of a target cell
(a) oligosaccharide (b) aminophospholipid (c) polysaccharide (d) sphingolipid