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Massachusetts Comprehensive Assessment System

2011, High School Biology

  Question 23: Open-Response  
DNA is found in the cells of all organisms. The structure of DNA is directly linked to its function.
  1. Describe the function of DNA in organisms.
  2. In your Student Answer Booklet, draw and label a simple model of DNA that includes the sugar/phosphate backbone and nitrogenous bases.
  3. Explain how the structure of DNA enables it to perform the function you described in part (a).

Scoring Guide and Sample Student Work
Select a score point in the table below to view the sample student response.

ScoreDescription
4 Response demonstrates a thorough understanding of the basic structure and function of DNA. The response correctly describes the function of DNA, provides a correctly labeled model of DNA, and clearly explains how the structure of DNA enables it to perform its function in organisms.
4
3
Response demonstrates a general understanding of the basic structure and function of DNA.
2
Response demonstrates a limited understanding of the basic structure and function of DNA.
1
Response demonstrates a minimal understanding of the basic structure and function of DNA.
0
Response is incorrect or contains some correct work that is irrelevant to the skill or concept being measured.

Note: There are 2 sample student responses for Score Point 4.

None found...

Return to the MCAS 2011 Student Work Directory



Last Updated: October 3, 2016
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