Specification of different mesodermal cell types in the frog Xenopus laevis by activin, a paracrine factor of the TGF-beta family. Which of the following observation is correct at the slightly lower concentration of activin?

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#Question id: 2571

#Unit 2. Cellular Organization

While examining a rock surface, you have discovered an interesting new organism. Which of the following criteria will allow you to classify the organism as belonging to Bacteria but not Archaea or Eukarya?

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#Question id: 2572

#Unit 2. Cellular Organization

If animals had alternation of generations like plants, ________.

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#Question id: 2573

#Unit 2. Cellular Organization

Certain unicellular eukaryotes, including diatoms and some yeasts, have mechanisms of nuclear division that may resemble intermediate steps in the evolution of mitosis. Which of the following is a characteristic feature of nuclear division in these organisms?

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#Question id: 2574

#Unit 2. Cellular Organization

Through a microscope, you can see a cell plate beginning to develop across the middle of a cell and nuclei forming on either side of the cell plate. This cell is most likely ________.

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#Question id: 2575

#Unit 2. Cellular Organization

NMR studies of the pectin molecules indicate that, which one is not true for pectin ?

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#Question id: 2576

#Unit 2. Cellular Organization

What effect will addition of AMP-PNP have on axonal transport?