Different transport systems for the same nutrient that are part of the same organism are usually regulated in different ways.
Answer the following statement true (T) or false (F)
True
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Quality control is performed to test the validity of catalase production at 68°C. M. fortuitum and M. tuberculosis are used, which yield a positive and negative reaction, respectively. Which one of the following statements explains this discrepancy?
a. Both organisms were most likely incu-bated at the wrong temperature. b. Both organisms were most likely incu-bated on the wrong media before testing. c. The catalase reagent is most likely expired. d. No discrepancy is present. M. fortuitum is catalase-positive and M. tuberculosis is catalase-negative at 68°C.
Where would you expect to find the Ca2+-activated form of gelsolin in cells crawling by amoeboid movement?
A) in and around focal adhesions B) at a pseudopodium tip where endoplasm is converting to ectoplasm C) at a pseudopodium base where ectoplasm is converting to endoplasm D) in the primary cilium E) at the cell trailing edge where force is produced to drive endoplasm forward streaming
The Egyptians believed in all of the following race categories except:
A. yellow B. red C. white D. brown
Humans can survive on Earth without biodiversity.
Indicate whether the statement is true or false.