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Item RH023009: Both an organism's physical characteristics and the function of the organism's cells could be influenced by the actions of protein molecules in an organism's cells (no specific organism identified).

Because the traits of organisms depends on the proteins they produce, evolutionary biologists study the proteins that organisms make. Which of the following describes ways that protein molecules are important to an organism?

  1. Proteins play a part in the development of an organism's physical characteristics and in the function of the organism's cells.
  2. Proteins play a part in the development of an organism's physical characteristics but not in the functions of the organism's cells.
  3. Proteins play a part in the function of the organism's cells but not in the development of the organism's physical characteristics.
  4. Proteins do not play a part in the development of an organism's physical characteristics nor in the function of the organism's cells.

Pre-Test

Distribution of responses (prior to studying evolution in high school)
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 580
6–8
n = 25
9–12
n = 514
Male
n = 254
Female
n = 286
English
n = 526
Other
n = 13
A. Proteins play a part in the development of an organism's physical characteristics and in the function of the organism's cells. 59% 56% 59% 56% 63% 60% 38%
B. Proteins play a part in the development of an organism's physical characteristics but not in the functions of the organism's cells. 17% 24% 18% 22% 13% 18% 23%
C. Proteins play a part in the function of the organism's cells but not in the development of the organism's physical characteristics. 19% 4% 19% 15% 22% 18% 31%
D. Proteins do not play a part in the development of an organism's physical characteristics nor in the function of the organism's cells. 4% 16% 4% 7% 2% 4% 8%

Post-Test (Control)

Distribution of responses (following typical high school instruction on evolution)
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 255
6–8
n = 15
9–12
n = 195
Male
n = 97
Female
n = 119
English
n = 205
Other
n = 6
A. Proteins play a part in the development of an organism's physical characteristics and in the function of the organism's cells. 62% 27% 64% 62% 61% 62% 33%
B. Proteins play a part in the development of an organism's physical characteristics but not in the functions of the organism's cells. 15% 33% 14% 18% 13% 15% 0%
C. Proteins play a part in the function of the organism's cells but not in the development of the organism's physical characteristics. 17% 33% 16% 14% 19% 17% 50%
D. Proteins do not play a part in the development of an organism's physical characteristics nor in the function of the organism's cells. 6% 7% 6% 6% 6% 6% 17%

Post-Test (Treatment)

Distribution of responses (following completion of an evolution curriculum module)
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 301
6–8
n = 8
9–12
n = 274
Male
n = 134
Female
n = 150
English
n = 274
Other
n = 9
A. Proteins play a part in the development of an organism's physical characteristics and in the function of the organism's cells. 72% 75% 72% 70% 74% 73% 67%
B. Proteins play a part in the development of an organism's physical characteristics but not in the functions of the organism's cells. 14% 0% 14% 16% 12% 14% 11%
C. Proteins play a part in the function of the organism's cells but not in the development of the organism's physical characteristics. 13% 25% 13% 10% 14% 13% 22%
D. Proteins do not play a part in the development of an organism's physical characteristics nor in the function of the organism's cells. 1% 0% 1% 3% 0% 1% 0%