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: 3846

#Unit 3. Fundamental Processes

A heat-sensitive DNA ligase (25°C permissive, 37°C nonpermissive) has been used to show that DNA synthesis is discontinuous. Examination of DNA replication in the presence of [3H]-thymidine in the mutant would demonstrate which of following?

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#Question id: 32286

#Unit 2. Cellular Organization

Which of the following is the major component of the ER folding machinery?

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#Question id: 14508

#Unit 13. Methods in Biology

There are three events A, B and C, one of which must occur and only one can happen, the odds are 8 to 3 against A, 5 to 2 against B; find the probability of C.

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#Question id: 7036

#Unit 5. Developmental Biology

In drosophila, which portion of the embryo at the blastoderm- stage will give rise to ectodermal, endodermal and mesodermal tissues?

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#Question id: 2399

#Unit 2. Cellular Organization

Approximately how many molecules of ATP are produced from the complete oxidation of one molecule of glucose (C6H12O6) in aerobic cellular respiration?