$22 77 UTG+1 limped, then facing 3.5xBB raise/call

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1)Is this an instamuck everytime?
2)What if I have TT,JJ?

PartyPoker $22 Speed Tournament, Big Blind is t100 (8 handed) Converter on pregopoker.com

UTG (t4215)
Hero (t1790)
MP1 (t1660)
MP2 (t2240)
CO (t3390)
Button (t2476)
SB (t2379)
BB (t1850)

Preflop: Hero is in UTG+1 with 7[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/spade.gif[/img]
<font color="gray">UTG folds</font>, Hero calls t100, <font color="gray">MP1 folds</font>, <font color="gray">MP2 folds</font>, <font color="red">CO raises to t350</font>, <font color="gray">Button folds</font>, SB calls t300, <font color="gray">BB folds</font>, Hero calls t250

Flop: (t1150) Q[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] (3 players)
<font color="red">SB bets t100</font>, Hero calls t100, CO calls t100

Turn: (t1450) J[img]/images/graemlins/spade.gif[/img] (3 players)
<font color="red">SB bets t425</font>, <font color="gray">Hero folds</font>, CO calls t425

River: (t2300) 6[img]/images/graemlins/club.gif[/img] (2 players)
<font color="red">SB bets t475</font>, <font color="gray">CO folds</font>