gen bio lipids

Joshua Timbol · 65問 · 2年前

通報

問題一覧

are usually associated with fats, which most people try to get rid of when attempting to lose weight.

Lipids

are not purely harmful. Many of our physiological functions highly rely on ____.

Lipids

Excessive consumption of food products that are rich in fats can lead to _____.

obesity and heart diseases

Characteristics

•Used as energy stores •Diverse chemical structures •Nonpolar hydrocarbon chains •Water-insoluble organic compounds

A typical fat consists of a _____ molecule with ___ chains that are combined through a dehydration reaction.

glycerol, three fatty acid

Glycerol + fatty acids

triglycerides

The two types of fatty acids are ___ fatty acid.

saturated and unsaturated

____ have no double bonds in their hydrocarbon chains which gives them a straight-chain conformation.

Saturated fatty acids

____ have hydrocarbon chains that contain one or more double bonds between carbon atoms. These double bonds usually bend in the carbon chain.

Unsaturated fatty acids

can be in the form of animal, plant, or fish fats.

Fats

usually consist of saturated fatty acids, which make them solid at room temperature.

Animal fats

are liquid at room temperature because of their unsaturated fatty acids.

Plant and fish oils

are produced from hydrogenation. They are common in fast foods, fried foods, and many junk food products.

Trans fats

are usual sources of trans fats. Excess consumption of these products may increase our risk of acquiring heart disease.

Fast-food items

A ______ has tails of two fatty acid chains and a head that contains a phosphate group.

phospholipid

hydrophilic head + hydrophobic tail

Phospholipid

The presence of unsaturated fatty acids in some phospholipids contribute to the ____ of the cell membrane.

fluidity

are a vital class of lipids because they are the primary components of cell membranes.

Phospholipids

are examples of steroids.

Cholesterol and testosterone

serves as the precursor of all other steroid products. It is a key component of animal cell membranes and an essential component in our diet.

Cholesterol

is naturally synthesized by the male gonad to initiate many male-specific changes in the body.

Testosterone

What structure is this?

Cholesterol

What structure is this?

Testosterone

are produced by plants to prevent desiccation or water loss when exposed to too much sunlight.

Waxes

are present in feathers of birds.

Waxy water repellent layers

are present in exoskeleton of insects.

Waxy water repellent layers

is a natural wax produced in honeycombs.

Beeswax

digestion involves the subsequent release of individual fatty acid chains, which ultimately produces a monoglyceride

Triglyceride

Triglyceride digestion involves the subsequent release of individual fatty acid chains, which ultimately produces a ___

monoglyceride

The ___ contain triglyceride molecules and other cholesterol molecules to carry these molecules from the intestine to the liver and adipose tissue.

chylomicrons

__ are lipids that have four interconnected carbon rings and no fatty acid tails. They have diverse roles, such as hormone synthesis and vitamin transport.

Steroids

is associated with carbohydrate metabolism, as products of glucose can also be converted into lipids.

Lipid metabolism

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