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what are the differences and similarities between saturated fats, unsaturated fats, and trans fats? thank you

2007-03-16 16:08:25 · 5 answers · asked by jcai 2 in Science & Mathematics Biology

5 answers

saturated fats are bad, their carbons contain the maximum hydrogens because they dont have double bonds, unsaturated do have double bonds between the carbons so hydrogens are fewer

2007-03-16 16:14:39 · answer #1 · answered by wesnaw1 5 · 0 0

The first answer is correct about saturated and unsaturated fats. Trans fat is little more difficult to explain without drawing it out for you. First, it is a type of unsaturated fat. Trans refers to the configuration around the double bond.

Without getting into too much organic chemistry, trans makes the fat straight instead of kinky. This makes them less fluid, and they have a higher melting point than cis (kinked) fats.

Since the trans fat is less fluid, it is more likely to get stuck in arteries, which then can cause cardiovascular disease.

2007-03-16 16:26:21 · answer #2 · answered by seychellie 3 · 0 0

Saturated fats are solid at room temperature and unsaturated fats are still liquid at room temperature. Trans fats are a type of unsaturated fat and may be monounsaturated or polyunsaturated. monounsaturated fats are fatty acids with one double-bonded carbon in the molecule. polyunsaturated fats are a fatty acid in which more than one double bond exists within the representative molecule.

2007-03-16 17:08:21 · answer #3 · answered by krisha p 1 · 0 0

Saturated fatty acids have no double bonds between the carbon atoms of the fatty acid chain, thus they are fully saturated with hydrogen atoms.

Some common examples of saturated fatty acids are butyric acid (4 carbon atoms; contained in butter), lauric acid (12 carbon atoms; in breast milk, coconut oil, palm oil), myristic acid (14 carbon atoms; in dairy products), palmitic acid (16 carbon atoms; in meat) and stearic acid (18 carbon atoms; meat and cocoa butter).

An unsaturated fatty acid in one where one or more double bonds exist in the fatty acid chain. A fatty acid is monounsaturated if it contains one double bond, and polyunsaturated if it contains more than one double bond. Where double bonds are formed, hydrogen atoms are eliminated.

Examples of unsaturated fatty acids are palmitoleic acid, oleic acid, linoleic acid, and arachidonic acid that are found in avocados, nuts, and soybean, canola, and olive oils.

Double bonds may be in either a cis or trans isomer, depending on the geometry of the double bond [think of it as this '_=_' is cis]. In the cis conformation hydrogens are on the same side of the double bond, whereas in the trans conformation they are on the opposite side. In biology, most unsaturation yields cis double bonds. Most trans fats consumed today are produced as a side effect of partial hydrogenation of plant oils — a process developed in the early 1900s. Partial hydrogenation changes a fatty acid's molecular form (raising its melting point and reducing its tendency to go rancid). This process also results in a portion of the changed fatty acid becoming trans fatty acids. Unlike other fatty acids, trans fatty acids are neither required nor beneficial for health and there is good evidence that eating trans fatty acids increases the risk of coronary heart disease.

2007-03-16 17:47:07 · answer #4 · answered by Jerry C 3 · 1 1

saturated fats are solid fats like butter, unsaturated fats are like oils and what is supposed to be the best are polyunsaturated.

2007-03-16 16:16:43 · answer #5 · answered by nana 5 · 0 0

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