Problem: ASCII:

ASCII was incorporated into the Unicode character set as the first 128 symbols, so the 7-bit ASCII characters have the same numeric codes in both sets. This allows UTF-8 to be backward compatible with 7-bit ASCII, as a UTF-8 file containing only ASCII characters is identical to an ASCII file containing the same sequence of characters. Even more importantly, forward compatibility is ensured as software that recognizes only 7-bit ASCII characters as special and does not alter bytes with the highest bit set (as is often done to support 8-bit ASCII extensions such as ISO-8859-1) will preserve UTF-8 data unchanged.

What set is backward compatible with 7-bit ASCII?
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A: UTF-8


Problem: Rainfall along the coast averages about 10 inches (250 mm) of precipitation annually. The average (mean) rainfall is 10.65 inches (271 mm) and the median is 9.6 inches (240 mm). Most of the rainfall occurs during the cooler months. The months of December through March supply most of the rain, with February the only month averaging 2 inches (51 mm) or more of rain. The months of May through September tend to be almost completely dry. Though there are few wet days per month during the rainy period, rainfall can be heavy when it does fall. Rainfall is usually greater in the higher elevations of San Diego; some of the higher elevation areas of San Diego can receive 11–15 inches (280–380 mm) of rain a year. Variability of rainfall can be extreme: in the wettest years of 1883/1884 and 1940/1941 more than 24 inches (610 mm) fell in the city, whilst in the driest years as little as 3.2 inches (80 mm) has fallen for a full year. The wettest month on record has been December 1921 with 9.21 inches (234 mm).
What is the average rainfall in January along the coast?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Other notable Old Etonians include scientists Robert Boyle, John Maynard Smith, J. B. S. Haldane, Stephen Wolfram and the 2012 Nobel Prize in Physiology or Medicine winner, John Gurdon; Beau Brummell; economists John Maynard Keynes and Richard Layard; Antarctic explorer Lawrence Oates; politician Alan Clark; entrepreneur, charity organiser and partner of Adele, Simon Konecki; cricket commentator Henry Blofeld; explorer Sir Ranulph Fiennes; adventurer Bear Grylls; composers Thomas Arne, George Butterworth, Roger Quilter, Frederick Septimus Kelly, Donald Tovey, Thomas Dunhill, Lord Berners, Victor Hely-Hutchinson, and Peter Warlock (Philip Heseltine); Hubert Parry, who wrote the song Jerusalem and the coronation anthem I was glad; and musicians Frank Turner and Humphrey Lyttelton.
What is Roger Quilter's occupation?
A: unanswerable


Context and question: In the beginning, the Quran did not have vocalization markings. The system of vocalization, as we know it today, seems to have been introduced towards the end of the ninth century. Since it would have been too costly for most Muslims to purchase a manuscript, copies of the Quran were held in mosques in order to make them accessible to people. These copies frequently took the form of a series of 30 parts or juzʼ. In terms of productivity, the Ottoman copyists provide the best example. This was in response to widespread demand, unpopularity of printing methods and for aesthetic reasons.
What are the parts of the Quran called that are 30 in total?
Answer: juzʼ


Question: There are also some extremely complex characters which have understandably become rather rare. According to Joël Bellassen (1989), the most complex Chinese character is /𪚥 (U+2A6A5) zhé  listen (help·info), meaning "verbose" and containing sixty-four strokes; this character fell from use around the 5th century. It might be argued, however, that while containing the most strokes, it is not necessarily the most complex character (in terms of difficulty), as it simply requires writing the same sixteen-stroke character 龍 lóng (lit. "dragon") four times in the space for one. Another 64-stroke character is /𠔻 (U+2053B) zhèng composed of 興 xīng/xìng (lit. "flourish") four times.
Is there an answer to this question: What have become more rare?

Answer: complex characters


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Additionally, genes can have regulatory regions many kilobases upstream or downstream of the open reading frame. These act by binding to transcription factors which then cause the DNA to loop so that the regulatory sequence (and bound transcription factor) become close to the RNA polymerase binding site. For example, enhancers increase transcription by binding an activator protein which then helps to recruit the RNA polymerase to the promoter; conversely silencers bind repressor proteins and make the DNA less available for RNA polymerase.
How do regulatory regions act?
A:
by binding to transcription factors