#Question id: 4110
#Unit 3. Fundamental Processes
Tay-Sachs disease belongs to the family of lysosomal storage diseases; it is an autosomal recessive neurodegenerative disorder caused by deficiency of the lysosomal enzyme hexosaminidase. The inability to degrade sphingolipids results in the deposition of these lipids in the cells that causes severe mental retardation and death in childhood. The most common mutation in Tay-Sachs disease patients is a 4-base pair insertion in exon 11 of the 14 exons of the hexosaminidase gene. What could be the most likely consequence of this mutation?
#Question id: 27556
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 33499
#Unit 2. Cellular Organization
#Question id: 4709
#Unit 11. Evolution and Behavior
The horizontal axis of the cladogram depicted below is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V-Z) represent various common ancestors. Let's say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.
In Darwin's tree of life, each fork in the tree represents ________.
#Question id: 6539
#General Aptitude
Fill in the blank : F2 ,.... , D8, C16, B32, A64