The solutions in the arms of a U-tube are separated at the bottom of the tube by a selectively permeable membrane. The membrane is permeable to sodium chloride but not to glucose. Side A is filled with a solution of 0.4 M glucose and 0.5 M sodium chloride (NaCl), and side B is filled with a solution containing 0.8 M glucose and 0.4 M sodium chloride. Initially, the volume in both arms is the same.

At the beginning of the U-tube experiment illustrated above, which of the following statements is true?

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#Question id: 11992

#Unit 10. Ecological Principles

Which of the following abiotic factors has the greatest influence on the metabolic rates of plants and animals? 

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#Question id: 1145

#Unit 4. Cell Communication and Cell Signaling

Phospholipase C is activated by:

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#Question id: 2830

#Unit 2. Cellular Organization

The NtrC protein from E. coli

a. is a σ54 RNA polymerase.             

b. stimulates transcription of the glnA gene.

c. is activated by a protein kinase called NtrB.

d. binds both to an enhancer site upstream of the glnA gene and to RNA polymerase.

e. has ATPase activity.

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#Question id: 33505

#Unit 2. Cellular Organization

Identification process of the presence of exons are hampered by

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#Question id: 1653

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements does NOT apply to IgG?