Paired examples from each family, starch against cellulose and DNA against RNA among them, drive this SC335 Unit 3 macromolecule comparison through five shared questions about structure and function. Searches like "sc 335 unit 3 assignment example", "sc335 unit 3 sample" and "sc335 unit 3 example" land here.
What a finished SC335 Unit 3 macromolecule comparison looks like
A table of eight columns, two for each family, and five rows fills the center of four pages. The carbohydrate pair is starch and cellulose; lipids pair a triglyceride with a phospholipid; proteins set collagen beside myoglobin; nucleic acids set DNA beside RNA. Rows ask, in order, what the monomer is, what bond links monomers and how that bond forms, what shape the bond allows, what job the molecule does, and what enzyme or condition breaks it. Beneath the table, one paragraph per family explains the single difference that separates its pair: alpha versus beta glycosidic linkage, a phosphate head replacing one fatty acid, a glycine-rich repeat versus a chain folded around heme, a hydroxyl group at the 2' carbon. A last paragraph names what the four differences have in common.
How a SC335 Unit 3 example is structured
Pairs, not families, are the analytic unit, because a comparison of four families alone repeats the textbook while a comparison inside each family forces the structure-to-function argument the course marks. The five rows are identical for every column, so the table reads across as well as down, and a reader can see that all four families link monomers by removing water and break them by adding it back. Each family paragraph follows one pattern: name the difference, show what it does to shape, and connect shape to job. Cellulose's beta linkage producing straight chains that stack into fibers, and RNA's extra hydroxyl making it easier to cut, are the two strongest examples and get the most space. The closing paragraph makes a single claim, that small changes in a bond or group redirect a molecule's whole biological role, and cites the course text for it.
Pairs inside each family
Two members built from the same kind of unit are compared within each family, so every difference in function has to be traced to one identifiable difference in structure.
Five rows asked of every column
Monomer, linking bond, the shape that bond permits, the molecule's work in the body and what breaks it are asked of all eight molecules, which lets the table be read in either direction.
Water out, water in
Condensation building every polymer and hydrolysis taking each apart are shown as a single pattern shared by all four families, stated once and pointed back to throughout.
One linkage, two fates
Alpha linkages coil starch into granules that amylase can open; beta linkages keep cellulose straight enough to stack, and human digestive enzymes cannot cut them.
An extra hydroxyl
RNA's 2' hydroxyl can attack its own backbone, which the comparison uses to explain why DNA, lacking that group, serves for long-term storage.
Where marks go in SC335 Unit 3
Tables that compare the four families but never compare molecules within a family draw the heaviest criticism, because they stop at categories the course expects students to reason beyond. Monomers misnamed, fatty acids called the monomer of a phospholipid with no mention of glycerol and phosphate, or nucleotides confused with nitrogenous bases, cost accuracy credit row by row. Calling lipids polymers draws a comment from many instructors; they are assembled from components but are not built from repeating monomers. Cellulose described as indigestible without the beta linkage behind it misses the structure-to-function point. Paragraphs that restate the table instead of explaining each difference add length without analysis. Bonds named without how they form, and figures copied without citation, pull the score down modestly.
Get a SC335 Unit 3 example written to your instructions
Attach the SC335 Unit 3 prompt and rubric; name the molecules your instructor listed, if any. Within 24-48h a free first custom comparison comes back following that prompt, its table asking identical questions of every molecule and its paragraphs tracing each difference in function to one change in structure.
SC335 Unit 3 questions, answered
Are lipids really macromolecules if they are not polymers?
Most courses group them with the other three because they are large, biologically essential and built from smaller components, but they are not chains of repeating monomers. A triglyceride is glycerol with three fatty acids attached, and a phospholipid replaces one of them with a phosphate-containing head. Your comparison can say this directly, which usually earns credit rather than costing it.
Why can't people digest cellulose?
Human digestive enzymes cut the alpha linkages between glucose units in starch but have no enzyme for the beta linkages in cellulose. Grazing animals rely on microbes in their gut that produce cellulases. Cellulose still matters in the human diet as fiber, adding bulk and feeding some gut bacteria, but it supplies little usable glucose.
How many molecules should the comparison include?
Where the prompt fixes a count, use it. Where it does not, one clear example per family meets most rubrics, and a pair within each family strengthens the structure-to-function argument. Eight molecules in one table stays readable; more than that usually crowds out the explanation, which is where most of the analysis credit sits.