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Item EB036002: Energy is given off when ATP and water react to form ADP and inorganic phosphate, but energy is taken in when ADP and inorganic phosphate react to form ATP and water.

Chemical reactions among ATP, water, ADP, and inorganic phosphate occur in living systems. Which of the following correctly describes how energy is transferred during these reactions?

  1. Energy is given off when ATP and water react to form ADP and inorganic phosphate, and energy is also given off when ADP and inorganic phosphate react to form ATP and water.
  2. Energy is given off when ATP and water react to form ADP and inorganic phosphate, but energy is taken in when ADP and inorganic phosphate react to form ATP and water.
  3. Energy is taken in when ATP and water react to form ADP and inorganic phosphate, but energy is give off when ADP and inorganic phosphate react to form ATP and water.
  4. Energy is taken in when ATP and water react to form ADP and inorganic phosphate, and energy is also taken in when ADP and inorganic phosphate react to form ATP and water.

Pre-Test

Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 110
6–8
n = 0
9–12
n = 102
Male
n = 62
Female
n = 37
English
n = 96
Other
n = 5
A. Energy is given off when ATP and water react to form ADP and inorganic phosphate, and energy is also given off when ADP and inorganic phosphate react to form ATP and water. 19% NAN% 17% 18% 16% 18% 0%
B. Energy is given off when ATP and water react to form ADP and inorganic phosphate, but energy is taken in when ADP and inorganic phosphate react to form ATP and water. 35% NAN% 37% 37% 41% 38% 40%
C. Energy is taken in when ATP and water react to form ADP and inorganic phosphate, but energy is give off when ADP and inorganic phosphate react to form ATP and water. 26% NAN% 27% 29% 24% 26% 60%
D. Energy is taken in when ATP and water react to form ADP and inorganic phosphate, and energy is also taken in when ADP and inorganic phosphate react to form ATP and water. 19% NAN% 19% 16% 19% 19% 0%

Post-Test

Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 137
6–8
n = 0
9–12
n = 128
Male
n = 79
Female
n = 42
English
n = 117
Other
n = 8
A. Energy is given off when ATP and water react to form ADP and inorganic phosphate, and energy is also given off when ADP and inorganic phosphate react to form ATP and water. 21% NAN% 22% 20% 26% 22% 25%
B. Energy is given off when ATP and water react to form ADP and inorganic phosphate, but energy is taken in when ADP and inorganic phosphate react to form ATP and water. 31% NAN% 30% 32% 31% 29% 25%
C. Energy is taken in when ATP and water react to form ADP and inorganic phosphate, but energy is give off when ADP and inorganic phosphate react to form ATP and water. 26% NAN% 26% 27% 24% 26% 25%
D. Energy is taken in when ATP and water react to form ADP and inorganic phosphate, and energy is also taken in when ADP and inorganic phosphate react to form ATP and water. 23% NAN% 22% 22% 19% 22% 25%