Statement: In the case of group II introns, the chemistry of splicing and the RNA intermediates produced are the same as those for nuclear pre-mRNA.

 Explanations: I. The intron uses an A residue within the branch site to attack the phosphodiester bond at the boundary between its 5’ end and the end of the 5’ exon-that is, at the 5’ splice site. This reaction produces the branched lariat.

II. A second reaction in which the newly freed 3’ -OH of the exon attacks the 3’splice site, releasing the intron as a lariat and fusing the 3’ and 5’ exons.

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#Question id: 608

#Unit 1. Molecules and their Interaction Relevant to Biology

The ʺTʺ state refers to the ________.

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#Question id: 11369

#Unit 9. Diversity of Life Forms

If new genetic variation in the experimental populations arose solely by spontaneous mutations, then the most effective process for subsequently increasing the

prevalence of the beneficial mutations in the population over the course of generations is

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#Question id: 5226

#Unit 11. Evolution and Behavior

Which of the following has the largest genome and the fewest genes per million base pairs?

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#Question id: 28259

#Unit 5. Developmental Biology

In mammalian eggs cell containing  thick extracellular matrix which analogous to the_____?_____

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#Question id: 28715

#Unit 2. Cellular Organization

COPI Vesicle transport from cis Golgi network to ER, these COPI vesicle coated with coat proteins, associated GTPase  is__________