The two wins in a week will have eased the pressure on Argyle's under-fire boss as he side ended a seven-match losing streak and edged up to third from bottom.
Rory Fallon, who scored the winner in the 2-1 victory at fellow strugglers Peterborough, headed Argyle's 57th-minute opener from a Gary Sawyer cross from the left to the far post.
It was a carbon copy of the same move which forced Iron goalkeeper Josh Lillis to flap Fallon's looping 44th-minute header onto the bar and away to safety.
Sturrock said: "Rory scored an identical goal to the one he got at Peterborough again today.
"He is a threat in the air when he is playing like that and he is also good in defence with his aerial ability."
Goalkeeper Romain Larrieu - who made a handful of first half stops to deny Iron dangermen Gary Hooper and Paul Hayes - conceded a 75th-minute penalty when he felled Martyn Woolford as the winger latched on to a return pass from fellow substitute Garry Thompson.
Fit-again recalled striker Hooper sent Larrieu the wrong way from the spot but Argyle only took a minute to regain the lead.
With central defender Rob Jones getting attention to a hamstring injury, Argyle broke through the middle.
Fallon headed the ball to skipper Carl Fletcher and his incisive through-ball sent substitute Alan Judge in on goal.
Judge was tumbled by keeper Lillis and got up to power home the penalty winner.
Sturrock said: "I think the win in the week has buoyed the boys. Before if they had got pegged back they would have let it affect them.
"Today they have gone straight up the other end and got a goal back, which turned out to be the winner."
Disappointed Iron boss Nigel Adkins said: "We came here with a game plan to play narrow, through the middle and get the Hayes-Hooper combination going against their young centre-backs and it's worked well.
"The first half I was pleased with but we had good opportunities and have not taken them.
"We have come away from home and we are looking nice and solid and could have scored three or four goals in the first half.
"We had talked about the threat of Fallon, just an easy ball into the box and if you don't stop the cross or don't compete you give him an opportunity.
"We targeted this game as one where we could take all three points because Plymouth are struggling and we have come away with nothing."