The histone tails are required for chromatin to condense from the beads-on- a-string conformation into the 30-nm fiber. Recent experiments indicate that the N-terminal tails of histone H4, particularly_____________, are critical for forming the 30-nm fiber.

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#Question id: 5130

#SCPH01 Biochemistry

Regulation by gradients of paracrine factor concentration was elegantly demonstrated by the 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 observations are correct from this graph?

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#Question id: 4128

#SCPH06 I Botany

Which of the following statements about tRNA molecules is false?

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#Question id: 4831

#SCPH12 I Genetics

There are 4 pairs of chromosomes in a Drosophila.The linkage groups present in it are

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#Question id: 15869

#SCPH05 I Biotechnology

In a modest laboratory, aseptic handling, maintenance and observation of cultures, these activities can be done in the culture room.  Some facilities are required for the culture room, except?

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#Question id: 2955

#SCPH01 Biochemistry

Cyclin is to MPF as ............ is to cyclin-dependent kinases.