Incubation of cells at 20°C blocks the release of proteins from the trans-Golgi. Under such conditions, you would expect to see
A. an increase in exocytosis.
B. a decrease in exocytosis.
C. an increase in endocytosis.
D. a decrease in endocytosis.
B. a decrease in exocytosis.
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Which types of plants contain vascular tissues?
A. Both gymnosperms and flowering plants contain vascular tissues. B. All plants except bryophytes contain vascular tissues. C. All plants contain vascular tissues. D. Only flowering plants contain vascular tissues.
Assuming independent assortment, what phenotypic ratio would you expect to see if an individual with the genotype RrGg is self-crossed?
A) 1:3 B) 9:3:3:1 C) 1:2:1 D) 1:3:2:1 E) 3:1
Listeria monocytogenes causes a variety of diseases, including food poisoning. Listeria are small, gram +, motile rod-shaped bacteria. Which of the following best describes these microorganisms?
A. listeria are facultative intracellular pathogens B. once infected, the immune system cannot destroy listeria C. listeria cannot be cultivated on artificial media D. flagella are produced both at room temperature and at 37C
Which instrument would be used to examine living cells that are attached to other surfaces, such as artery plaques?
a. Phase-contrast microscope b. Scanning acoustic microscope c. Fluorescence microscope d. Confocal microscope