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: 962

#Biochemistry

The carbon in urea originates from ________.

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#Question id: 963

#Biochemistry

________ is hydrolytically cleaved to directly yield urea in the urea cycle.

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#Question id: 964

#Biochemistry

In mammals, ureogenesis occurs almost exclusively in the ________.

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#Question id: 966

#Biochemistry

 In the urea cycle the nitrogen atoms originate from ________.

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#Question id: 967

#Biochemistry

At the subcellular level where does the urea cycle occur?

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#Question id: 968

#Biochemistry

In the urea cycle which molecule is transported from the mitochondrial matrix to the cytosol as ornithine is transported in the opposite direction?