细胞是组成生物体的基机构单元 ,是生物体进行代谢、能量转换 遗传以及其它生理活动的基本场所

胆固醇以中性脂的形式分布在双层脂膜 内,对生物膜中脂类的物理状态有一定的调节作用,有利于保持膜的流动性和降低相变温度

一,氨基酸的结构和分类 除甘氨酸和脯氨酸外,其他均具有如下结构通式

一、蛋白质合成的分子基础 二、翻译的步骤 三、蛋白质的运输及翻译后修饰

一、核酸和核苷酸的分解代谢 二、核苷酸的生物合成 三、辅酶核苷酸的生物合成

Atomic Structure All natural and most synthetic substances on earth are made from the ninety naturally occurring chemical elements. An atom is the smallest particle into which an element can be divided while still retaining the chemical characteristics of that element (fig 3. 1). The nucleus, at the center of the atom contains one or more particles with a positive electrical charge(protons fif and usually some particles of similar mass that have no charge(neutrons

1. Reduction(fixation)of N, into ammonia(NH3 or NH*) 2. Synthesis of the 20 amino acids 3. Synthesis of other biomolecules from amino acids 4. The de novo pathways for purine and pyrimidinebiosynthesis 5. The salvage pathways for purine and pyrimidine reuse

1. How does a DNA molecule replicate withhigh fidelity? 2. How are DNA lesions(damages) repairedto maintain the integrity of geneticinformation? 3. How do dna molecules recombine(rearrange)?High accuracy, multitude of participants

天津市中德职业技术学院：《工程材料 Engineering Materials》第一章 材料的结构与性能 1.2 金属材料的性能 1.2.2 金属材料的物理、化学和工艺性能

1. Reduction(fixation)of N, into ammonia(NH3 or NH*) 2. Synthesis of the 20 amino acids 3. Synthesis of other biomolecules from amino acids 4. The de novo pathways for purine and pyrimidinebiosynthesis 5. The salvage pathways for purine and pyrimidine reuse