SAT2生物核心词汇：血脂和磷脂.

　　SAT2考试是SAT subject test的通常说法，SAT2考试有别于SAT1，它是一种专项考试，考察学生某一科目的能力。下面就为大家介绍一下SAT2生物核心词汇：血脂和磷脂，希望对即将报名SAT2生物考试的同学有所帮助。

　　Polypeptides

　　All proteins are made of chains of some orall of these 20 amino acids. The bond formed between two amino acids bydehydration synthesis is known as a peptide bond.

　　A particular protein has a specific sequence of amino acids, which is known as its primary structure.Every protein also winds, coils, and folds in three-dimensional spacein specific and predetermined ways, taking on a unique secondary(initial winding and coiling) and tertiary structure (overall folding).In harsh conditions, such as high temperature or extreme pH, proteinscan lose their normal tertiary shape and cease to function properly.When a protein unfolds in harsh conditions, it has been “denatured.”

　　血脂

　　血脂是碳水化合物但不溶于水。他们是有别于其他生物大分子的特点在长的链上碳与氢相连。这种链不溶于水，因为他们非极性。

　　甘油三酯

　　甘油三酸酯的构成为三条长链烃末端连有不饱和脂肪酸，叫做甘油。

　　因为他们包括3个脂肪酸，脂肪油砂也被称为甘油三酯。由于这点 ，甘油和脂肪酸，互相进入对方脱水的合成。

　　一些饱和脂肪，而另一些不饱和。这些的分别指的是存在或没有碳碳双键，在不饱和脂肪酸的油脂。饱和脂肪没有碳碳双键，不饱和脂肪酸，而包含一个或多个这样碳碳双键。在一般情况下，植物是不饱和脂肪和动物脂肪是饱和。饱和脂肪一般在室温下为固体，而不饱和脂肪通常是液体。

　　Lipids

　　Lipids are carbon compounds that do notdissolve in water. They are distinguished from other macromolecules bycharacteristic hydrocarbon chains—long strings of carbonmolecules with hydrogens attached. Such chains do not dissolve well inwater because they are nonpolar.

　　磷脂

　　细胞膜重要组成部分是磷脂，构成一个甘油分子上连接二个不饱和脂肪酸链和一个磷酸基团( po4 - 2 ) ：

　　像所有脂肪，磷脂的烃的后部不溶于水。不过，磷酸盐集团溶解在水中，因为他们是极性分子。不同的溶解度两端的磷脂分子为磷脂双分子层称为细胞膜。

　　以上便是澳际小编为大家搜集整理的SAT2生物核心词汇：血脂和磷脂具体介绍，大家可以在自己的SAT2生物词汇备考的过程中进行适当的熟悉和记忆，以便更好的应对SAT2生物考试。