合成生物可以合成哪些东西作文 - 学习作文网

合成生物可以合成哪些东西作文【一】

核膜：为双层结构，包含外膜和内膜。

核纤层：核内膜内侧一层蛋白质网络结构。

核仁：是rRNA合成加工和装配核糖体亚单位的重要场所。

染色质：是间期细胞核遗传物质的存在形式。染色体是细胞有丝分裂时遗传物质的特定形式。

合成生物可以合成哪些东西作文【二】

高尔基体由一层扁平、碟形的泡囊所组成, 边缘往往分支，形成复杂的管状网络。与分泌作用有关。

合成生物可以合成哪些东西作文【三】

1、细胞壁的形成：由原生质体分泌的物质形成，在细胞分裂过程中已形成。成分：主要是纤维素、果胶质，还有非纤维素的多糖、水和蛋白质等其他物质。

2、细胞壁的功能：维持细胞形状，保护原生质体，影响植物的吸收、保护、支持、蒸腾、物质运输、分泌等要的生理活动。

3、细胞壁的结构:

合成生物可以合成哪些东西作文【四】

直径为的微小颗粒，主要成分为蛋白质（60％）和RNA(40%。游离存在、附在内质网上，也可形成多聚核糖体。细胞内蛋白质合成的场所。

合成生物可以合成哪些东西作文【五】

组织：指植物体内许多形态结构、机理相同的细胞，在器官发育中有相同来

源，且相互密切联系共同完成一种或几种生理功能的细胞群。

器官：由各种不同的组织组合在一起形成植物的器官。

简单组织：由一种类型细胞构成的组织。

复合组织：由多种类型细胞构成的组织。

合成生物可以合成哪些东西作文【六】

微体也是由单位膜包围的，呈球形。植物细胞中分为两类：过氧化物酶体和乙醛酸循环体。

合成生物可以合成哪些东西作文【七】

Dear Sir or Madam:

In my capacity as the chairman of Biochemistry and Molecular Biology Department, the School of Life Science, Nankai University, I deem it a pleasure to recommend Mr. Bruce Liu as a worthy candidate for graduate studies at the Department of Cell and Molecular Biology of your esteemed university.

Over the past four years, I delivered two important courses Genetics and Cell Engineering to the Mr. Liu‘s class and his performance was impressive. He is endowed with a strong curiosity in the quest for new knowledge. Before attending each class, he would make full preparations so that he could quickly assimilate what was being taught. Sometimes he could come up with some surprisingly thought-provocative questions and he had a habit of discussing important problems with me in great detail. During those discussions, he often brought with him valuable materials that he obtained from a large quantity of technical literature. Such an initiative enabled him to broaden his ken of knowledge extensively and to cultivate and significantly improve his ability in reading technical literature in English and to follow the latest scientific and technological development in the world. Therefore, even before he graduated, he had already distinguished himself from the rest of his classmates in his English proficiency. Furthermore, his indefatigable spirit of reading large amount of technical materials was not simply intended to secure high scores in his coursework, but more importantly, to satisfy his almost insatiable interest in biology.

Apart from this, I was also very impressed by Mr. Liu‘s hands-on ability in conducting experiments. For many complicated experiments, he undertook them with a rigorous and conscientious attitude and would always complete them satisfactorily. In dealing with crucial steps involved in the experiments, he tended to make bold hypotheses and conduct substantial observations, ultimately achieving remarkable results. All those testify to Mr. Liu‘s tremendous potential in academic research, especially in his analytical skills and in the execution of experimental procedures.

In addition to his scholastic aptitudes, Mr. Liu can be described as trustworthy in personality. His kind-hearted nature and his integrity have created many friends for him. By no means a bookworm, Mr. Liu took an active part in extracurricular activities in which he enhanced his group spirit and the sense of collectivism. His willingness to assist his classmates has brought him a very high reputation.

To summarize, Mr. Liu has been an outstanding student in our department and he is fully qualified to undertake high-level studies in a more challenging environment. His excellent qualities will undoubtedly facilitate him in achieving satisfactory results in his future academic pursuit and in his career.

Yours Sincerely

Professor and Chairman of Biochemistry and Molecular Biology Department

Nankai University