What was proposed as a basic taste by a chemist in 1908? The Saturday quiz

The questions

1 What was proposed as a basic taste by chemist Kikunae Ikeda in 1908?
2 At the centre of the Milky Way, what is Sagittarius A*?
3 Which Booker prize-winning novel has no named characters?
4 Miniminter, KSI and Zerkaa are members of which collective?
5 The helots were people subjugated by which city-state?
6 Which official censored British theatre until 1968?
7 Which sculpture stands by the A1 in Gateshead?
8 San Miguel beer and Tanduay, the world’s bestselling rum, come from where?
What links:
9 Laputa; Nublar; Saint Marie; Skull; Sodor; Utopia?
10 Castellaneta; Kavner; Cartwright; Smith?
11 Frederick of Utrecht, 838; Thomas Becket, 1170; Óscar Romero, 1980?
12 Chairman of ways and means; first deputy; second deputy?
13 Dubris; Londinium; Verulamium; Venonis; Viroconium?
14 Euphoria and Tattoo; What’s Another Year and Hold Me Now?
15 1858 medical textbook; Shonda Rhimes and Ellen Pompeo?

Riled up by the Shonda Rhimes clue? Photograph: Gilbert Flores/WWD/Getty Images

The answers

1 Umami.
2 (Supermassive) black hole.
3 Milkman (Anna Burns).
4 The Sidemen (YouTube personalities).
5 Sparta.
6 Lord Chamberlain.
7 Angel of the North.
8 The Philippines.
9 Fictional islands: Gulliver’s Travels; Jurassic Park; Death in Paradise; King Kong; Thomas the Tank Engine; Thomas More book.
10 Voices of The Simpsons: Homer; Marge; Bart; Lisa.
11 Archbishops/bishops murdered in their cathedrals (and later canonised): the Netherlands; Canterbury; El Salvador.
12 Deputy speakers of the Commons: Nusrat Ghani, Judith Cummins, and Caroline Nokes.
13 Roman settlements linked by Watling Street: Dover; London; St Albans; High Cross; Wroxeter.
14 Songs by double Eurovision winners: Loreen and Johnny Logan.
15 Grey’s Anatomy: Gray’s Anatomy book; created TV series and played title character.