Many eukaryotic genes contain a large number of exons. Correct splicing of such genes requires that neighboring exons be ligated to one another; if they are not, exons will be left out. One early proposal suggested that the splicing machinery bound to a splice site at one end of an intron and scanned through the intron to find the splice site at the other end. Such a scanning mechanism would guarantee that an exon was never skipped. This hypothesis was tested with one minigene with a duplicated 5ʹ splice site. Find diagram of the products you expect from minigene if the splicing machinery binds to a 5ʹ splice site and scans toward a 3ʹ splice site.

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#Question id: 774

#Unit 1. Molecules and their Interaction Relevant to Biology

RISC stands for:

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#Question id: 9199

#Unit 9. Diversity of Life Forms

Ecosystem services include processes that increase the quality of the abiotic environment. Which of the following processes would fall under this category?

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#Question id: 5272

#Unit 8. Inheritance Biology

Clever technique that streamlines the identification of auxotrophic mutants is

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#Question id: 11949

#Unit 7. System Physiology – Animal

If a woman has a tumor secreting large amounts of estrogen from the adrenal gland, which of the following will occur?

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#Question id: 2332

#Unit 2. Cellular Organization

Which portion of a phospholipid molecule would be facing the interior of the cell?