Ruled an interception, it wasted a good scoring chance for the Illini

 Illinois wide receiver A.J. Jenkins didn't understand.

He caught the ball. Went to the ground. The next thing he knows, the Illini defense was coming onto the field.   After taking over at the Penn State 40 following an interception by Terry Hawthorne early in the third quarter, the Illini lost possession two plays later when official ruled Penn State cornerback D'Anton Lynn wrestled the ball away from Jenkins during the 10-7 loss at No. 21 Penn State.   The play looked suspect.   "I caught the ball,'' Jenkins said. "I thought I was down. The DB came up with the ball, and they said it was an interception.   "I caught the ball and went to the ground. I was down. I got up, and the defense was coming onto the field.''   Coach Ron Zook was told rules didn't allow him to challenge the call, he said.   "They said it was a non-reviewable play,'' Zook said. "We all felt like he had it. The guy told me when he was on the ground, he was bobbling it.''   TWO QBs: After logging his first snaps in Big Ten play at Purdue last week, Illinois played backup quarterback Reilly O'Toole more against Penn State, but Zook said it wasn't a plan to move toward a two-quarterback platoon.   The Illini called upon O'Toole when starter Nathan Scheelhaase took a helmet-to-helmet hit in the second quarter. Scheelhaase needed a moment to clear his head.   "Nathan got ding there,'' Zook said, and the Illini wanted him to rest before getting back to action.   But the Illini used O'Toole on several passing downs in the second half. "We have to evaluate and use him a little more,'' Zook said. "Nathan gives you the legs to make some things happen and move the chains. Nate is a little bit better at that for us.''   Scheelhaase completed 9 of 16 for 62 yards with one touchdown. He also ran for 89 yards on 14 carries. O'Toole was 4 of 7 for 31 yards. He threw the pass to Jenkins that was ruled an interception.   CONDITIONS: A snowstorm that blanketed Happy Valley with 4 to 6 inches of snow didn't help the passing game, and it was likely a bigger inconvenience for the fans than Illini running back Jason Ford.   Penn State sold 97,828 tickets but an estimated 62,000 attended the game. Thousands of fans streamed out of the stadium at halftime, when there was a scoreless tie. The weather didn't bother Ford.   He rushed for 100 yards, hitting the century mark for the first time this season. An Illinois runner hadn't reached 100 since Donovonn Young rushed for 100 against Western Michigan in the fourth week of the season.   "It was more of a smash-mouth game, more of the game I like,'' he said. "The field was pretty good. It was hard to cut at first, trying to get a burst.''   NOTABLE: Jenkins became the first Illini to surpass 1,000 yards receiving since Brandon Lloyd had 1,010 in 2002. WIth six catches for 43 yards, Jenkins has 1,030 yards. . .    Paterno broke a tie with former Grambling coach Eddie Robinson for the most wins in Division I (FBS) history. Paterno, who is in his 46th year as Nittany Lions coach, sat in the press box during the game. . .    John Supinie can be reached at Johnsupinie@aol.com. Follow him on Twitter @JohnSupinie.