When the inner cells are removed from the mammalian embryo and cultured in vitro, they establish a population of pluripotent cells, which is

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#Question id: 31114

#Unit 2. Cellular Organization

When the level of Ca²⁺ is raised, which of the following causes troponin I to release its hold on actin?

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#Question id: 28798

#Unit 2. Cellular Organization

To nucleate the assembly of branched actin filaments, Arp2/3 needs to be activated by___

a) Formins protein

b) nucleation promoting factor (NPF)

c) actin-nucleating proteins (ANP) 

d) Act A protein

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#Question id: 4327

#Unit 3. Fundamental Processes

What would occur if the repressor of an inducible operon were mutated so it could not bind the operator?

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#Question id: 11504

#Unit 9. Diversity of Life Forms

Which organisms represent the common ancestor of all photosynthetic plastids found in eukaryotes?

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#Question id: 479

#Unit 1. Molecules and their Interaction Relevant to Biology

The first reaction in glycolysis that results in the formation of an energy-rich compound (i.e., a compound whose hydrolysis has a highly negative DG'°) is catalyzed by