Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

[Q]: Selenocysteine, a selenium-containing analog of cysteine, is found in the prokaryotic and eukaryotic kingdoms in active sites of enzymes involved in oxidation-reduction reactions. Its biosynthesis and cotranslational insertion into selenoproteins is performed by an outstanding mechanism, implying the participation of several gene products. The tRNA(Sec) is one of these. In eukaryotes, its transcription mode by RNA polymerase III differs from that of classical tRNA genes, both at the level of the promoter elements and transcription factors involved. In addition, enhanced transcription is afforded by a newly characterized zinc finger activator. Not only transcription of the gene, but also the tRNA(Sec) itself is atypical since its 2D and 3D structures exhibit features which set it apart from classical tRNAs. Decoding of eukaryotic selenocysteine UGA codons requires a stem-loop structure in the 3'UTR of mRNAs, the selenocysteine insertion sequence (SECIS) element. Structure probing and sequence comparisons led us to propose a 2D structure model for the SECIS element, containing a novel RNA motif composed of four consecutive non-Watson-Crick base-pairs. A 3D model, rationalizing the accessibility data, was elaborated by computer modeling. It yields indicative or suggestive evidence for the role that could play some conserved residues and/or structural features in SECIS function. These might act as signals for interaction with SBP, the SECIS binding protein that we have characterized.
[A]: What is the name of the stem loop present in the 3' end of genes encoding for selenoproteins?

[Q]: It was a comfortable sunny Sunday. I was going to meet an old university friend I hadn't seen for years, and was really excited to hear all his news. My train was running a little late, but that was no big problem - I could text him to say I would be delayed. He would understand. But... where was my mobile phone? I had that familiar sinking feeling. Yes, I'd forgotten it at home. No mobile phone. I'm sure I'm not alone in feeling anxious, _ and worried when I don't have my phone with me. In fact, I know I'm not alone: two-thirds of us experience 'nomophobia', the fear of being out of mobile phone contact. That's according to a study from 2012 which surveyed 1,000 people in the UK about their relationship with mobile phones. It says we check our mobile phones 34 times a day, that women are more 'nomophobic'than men, and that 18-24 year-olds are the most likely to suffer fear of being without their mobiles: 77% of them say they are unable to be apart from their phones for more than a few minutes. Do you have nomophobia ? * You never turn your phone off * You obsessively check for texts, missed calls and emails* You always take your phone to the bathroom with you* You never let the battery run out It's funny to think that around 20 years ago the only people with mobile phones would be businessperson carrying their large, plastic 'bricks'. Of course, these days, mobile phones are everywhere. A UN study from this year said mobile phone subscriptions would outnumber people across the world by the end of 2014. And when there are more phones than people in the world, maybe it's time to ask who really is in charge? Are you in control of your phone, or does your phone control you? So, what happened with my university friend? When I arrived a few minutes late he just laughed and said: "You haven't changed at all - still always late!" And we had a great afternoon catching up, full of jokes and stories, with no interruptions and no nagging desire to check my phone. Not having it with me felt strangely liberating. Maybe I'll leave it at home on purpose next time.
[A]: Which word is used to describe old mobile phones according to the passage?

[Q]: Successful mining took time and capital, particularly once most of the timber around the Klondike had been cut down. A realistic mining operation required $1,500 for wood to be burned to melt the ground, along with around $1,000 to construct a dam, $1,500 for ditches and up to $600 for sluice boxes, a total of $4,600. The attraction of the Klondike to a prospector, however, was that when gold was found, it was often highly concentrated. Some of the creeks in the Klondike were fifteen times richer in gold than those in California, and richer still than those in South Africa. In just two years, for example, $230,000 worth of gold was brought up from claim 29 on the Eldorado Creek.
[A]:
Where was gold more prevalent