3-D DNA Model

DNA model Rubric                                   TURN THIS IN WITH MODEL                     name ________________________Due:__________

 

Nitrogen bases

(rungs)

Nitrogen bases are correctly represented with opposite base pair colors consistent.

30  29  28  27  26

Nitrogen bases are shown in pairs, but colors are not consistent

25  24  23  22  21

Nitrogen bases are not shown with separate colors

 

20  19  18  17  16  15

Sugars and Phosphates

(railings)

Sugars (deoxyribose) and phosphates are correctly represented, with alternating colors and nitrogen bases only coming from sugars.

10  9  8  7 

Sugars (deoxyribose) and phosphates are represented with alternating colors, but nitrogen bases are attached at random.

 

6  5  4  3

Railings are part of model, but not shown in alternating colors.

 

 

 

2  1

Model Likeness to DNA

Model is a 3D twisted ladder, with nitrogen base pairs (steps) all of the same size.

 

 

20  19  18  17  16

Model is 3D, but flat – not a twisted ladder.  Nitrogen base pairs have different lengths and railings touch as they cross over.

15  14  13  12  11

Model is not 3D

 

 

 

 

10  9  8  7  6  5

Labeling/Key

Present, thorough and neatly done. Integral part of project.

 

15  14  13  12  11

Present and complete, but appears hastily done as an afterthought

10  9  8  7  6

Present, but not complete.

 

 

5  4  3  2  1  0(not present)

Completeness/Turned in on-time. Due: April 1 (Bio II, III) and April 4 (Bio I)

Adequate number (at least 12) of nitrogen base pairs to show understanding and concept.

20  19  18  17  16

Less than 12 (8-11) base pairs.

 

 

15  14  13  12  11

Minimal number (less than 8) of base pairs.  Needs more.

 

10  9  8  7  6  5

Professional/neat

Extremely Professional/neat. 

5

Neat. 

3

Not too neat.

1

Steps to making a 3-D DNA Model        

 

  1. Look up “DNA Model” images.
  2. Choose one you like and sketch a plan for your design.
  3. On your design, label the following:
    1. Adenine
    2. Guanine
    3. Thymine
    4. Cytosine
    5. Phosphates
    6. Sugars (Deoxyribose is a 5 carbon sugar)

4. Have design checked by Mr. Onos or Ms. Burtch.

      5. Choose and gather materials.

  1. Make a key. Remember that A binds with T, C binds with G. Nucleic acids also connect with the backbone of the molecule at the sugars.

-Remember to add what DNA stands for.

-Also remember to mention the job of DNA…what is DNA for?

  1. Build the model.
  2. Bring model and rubric to school.
  3. Make sure your name is on the model and rubric.
  4. Be prepared to answer “understanding” questions on a mini-quiz the date it is due.
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