{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Digestibility of Cellulose and

Digestibility of Cellulose and - triglyceride or fat...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Digestibility of Cellulose and Chitin Humans and most animals do not have the necessary enzymes needed to break the linkages of cellulose or chitin. Animals that can digest cellulose often have microorganisms in their gut that digest it for them. Fiber is cellulose, an important component of the human diet. Lipids Lipids are compounds that are insoluble in water but soluble in nonpolar solvents. Some lipids function in long-term energy storage. One gram of fat stores more than twice as much energy as one gram of carbohydrate. Lipids are also an important component of cell membranes. Fats and Oils (Triglycerides) Fats and oils are composed of fatty acids and glycerol. Fatty acids have a long hydrocarbon (carbon and hydrogen) chain with a carboxyl (acid) group. The chains usually contain 16 to 18 carbons. Glycerol contains 3 carbons and 3 hydroxyl groups. It reacts with 3 fatty acids to form a
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: triglyceride or fat molecule. Fats are nonpolar and therefore they do not dissolve in water. Saturated and Unsaturated Fat Saturated fatty acids have no double bonds between carbons. Unsaturated fatty acids have at least one double bond. Each double bonds produces a "bend" in the molecule. Double bonds produce a bend in the fatty acid molecule (see diagram above). Molecules with many of these bends cannot be packed as closely together as straight molecules, so these fats are less dense. As a result, triglycerides composed of unsaturated fatty acids melt at lower temperatures than those with saturated fatty acids. For example, butter contains more saturated fat than corn oil, and is a solid at room temperature while corn oil is a liquid....
View Full Document

{[ snackBarMessage ]}