During which cellular process do all three forms of RNA associate?
A. ribosome assembly
B. protein synthesis
C. chromatin formation
D. formation of the nucleolus
Answer: B
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A molecular biologist treats a 600-kb length of linear DNA with HindIII restriction endonuclease. Following gel electrophoresis, the biologist observes that there is only one band on the gel corresponding with the migration distance of the 200-kb molecular weight marker. Assuming that no procedural errors were made, what can be concluded from these results?
A. There were no HindIII recognition sequences present in the original DNA. B. Three HindIII recognition sequences were present in the original DNA. C. One HindIII recognition sequence was present in the original DNA. D. Two HindIII recognition sequences were present in the original DNA.
Which of the following hormones stimulates an increase in basal metabolic rate as a tropic hormone?
a) prolactin b) follicle-stimulating hormone c) adrenocorticotropic hormone d) thyroid-stimulating hormone
All of the following statements regarding C4 plants are true except:
A) rubisco is no longer necessary to make glucose. B) they resemble CAM plants in that they keep their stomata closed during the day. C) they require more ATP to produce glucose than C3 plants. D) C4 plants grow better than C3 plants under low CO2 conditions. E) C4 plants may expand their ranges with global warming.
The basic structure of a virus includes the:
A. Inner nucleus and outer capsid B. Outer capsid and outer cell membrane C. Inner core and outer cell membrane D. Outer capsid and inner core