But Jones hit back with two more penalties to cut the gap to seven points and an interception and charge for the line by giant lock Alun-Wyn Jones briefly raised home hopes.
Ulster surged into a 21-0 half-time lead with their second try in the 32nd minute when after a line-out take by Frost, the pack drove the big lock over the line.
And three minutes later the Scarlets conceded their second try when the Clermont forwards powered to the line following a line-out with lock Loic Jacquet emerging as the scorer as the French club led 12-0.
The all-important fourth try for a bonus point soon followed, as a rolling maul from a five-metre lineout shoved lock Cooper over the line.
The lock breached the home line but was awarded the try only after television match official Derek Bevan had ruled there had been downward pressure.
Hibbard prevented Tito taking a quick line-out and the Kiwi lock seemed to lash out at the Welsh international, who in turn seemed to head-butt the giant Blues star.
Saracens continued to carve out chances and lock Hugh Vyvyan was bundled over the line only for the television match official to rule that he had been held up.
As a general rule, they tend to distort markets and sectors, have unintended consequences down the line at best and immediately at worst, and lock in ways of doing things at the expense of innovation.
Some brave defence kept the Scarlets out for a while but eventually lock Eustace powered through to reach for the line.
Exeter came out brightly after the restart and were almost rewarded for their efforts with a try, lock James Hanks stopped just short of the line.
Hogg went over the line after receiving replacement Matt Mustchin's pass but the lock forward was adjudged by the television match official to have been in touch when he released the ball.
Swinging arms aside, there was little of note to get the 28, 643 spectators excited about in a slow-paced first half until Irish lock and match-day captain Paul O'Connell lunged over the line for the first try of the Lions tour.
The Dragons went back to basics, and a series of short-range forward drives ended with a try for the outstanding Owen, the lock reaching over the top of a pile-up on the Exiles' line.
It will gain a fixed-line arm, but that is no recompense for what it will give up: its lock on the massive mobile market, encompassing two-thirds of Chinese customers and an even higher share of new subscribers.
Things went from bad to worse for Andy Robinson's Edinburgh side when lock Craig Hamilton was shown the yellow card on 50 minutes for pulling down in the line-out.
Edinburgh lock Craig Hamilton pounced and his hack downfield ended with Ben Cairns going over the try-line.
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