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JBT Task 5 (0515)


Competency 208.5.6: Lipids – The graduate constructs models of fatty acids and demonstrates why lipids are essential to the functioning of cells.
Task 5: Lipids


Despite the negative attention they often receive, fats (and other lipid molecules) play an extremely important role in the biochemical processes in our bodies. For this task, you will consider some of the biochemical roles of lipids (especially fatty acids) and demonstrate how a complete lack of fat in the diet would affect these biochemical roles and human health in general.

You should compile your work for this task in a single document (e.g., Microsoft Word, Google Document) that includes diagrams, text explanations, and references. If a requirement asks for an explanation, you should provide a written response in a narrative style (i.e., complete sentences rather than bullet points).

Note: Multimedia presentations (e.g., PowerPoint, Keynote) will not be accepted due to potential originality concerns.

Note: Please save submission documents as *.doc, *.docx, *.rtf, or *.pdf files. If you are using Google Documents, you must save the file in *.pdf format and upload the *.pdf file.


You have been asked to help dietitians in a local community health center to better understand the importance of fat in the diet and particularly how no-fat diets affect the biochemical processes of the body.

A. Explain how lipids, in the form of triglycerides, are broken down to produce ATP, including each of the following:
● the pathways involved in the breakdown
● the substrate(s) and end product(s) of the pathways

B. Explain two differences between saturated and unsaturated fatty acids (not fats).
1. Create one original 3-D model to demonstrate the chemical structure of a saturated fatty acid.
2. Create one original 3-D model to demonstrate the chemical structure of an unsaturated fatty acid.

Note: Take a picture of your completed 3-D models as evidence that you created them. You can include the pictures as part of your document, or you can submit them in Taskstream as separate attachments.

C. Create an original diagram, with clear labels, to demonstrate the fluid mosaic structure of cell membranes.

Note: The inclusion of the following components aids in demonstrating the fluid mosaic structure: phospholipids, hydrophilic portion, hydrophobic portion, and membrane protein(s).

D. Explain how no-fat diets can affect the body (e.g., nutrient absorption, essential fatty acids), including each of the following:
● the molecule, or class of molecules affected
● how the absence of fat influences the availability of the molecule, or class of molecules
● the consequence(s), at the biochemical level (i.e., not simply physiological changes), of the change in availability

E. When you use sources, include all in-text citations and references in APA format.

Note: For definitions of terms commonly used in the rubric, see the Rubric Terms web link included in the Evaluation Procedures section.

Note: When using sources to support ideas and elements in an assessment, the submission MUST include APA formatted in-text citations with a corresponding reference list for any direct quotes or paraphrasing. It is not necessary to list sources that were consulted if they have not been quoted or paraphrased in the text of the assessment.

Note: No more than a combined total of 30% of a submission can be directly quoted or closely paraphrased from sources, even if cited correctly. For tips on using APA style, please refer to the APA Handout web link included in the General Instructions section.
Evaluation Method
A rubric is used in this Evaluation.
Name of rubric: JBT Task 5 (0515) [View rubric link opens in new window]

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